Xiaofeng Luo

Central China Normal University

H-index: 79

Asia-China

About Xiaofeng Luo

Xiaofeng Luo, With an exceptional h-index of 79 and a recent h-index of 61 (since 2020), a distinguished researcher at Central China Normal University, specializes in the field of Nuclear Physics, Particle Physics, QCD Phase Diagram, QCD Critical Point.

His recent articles reflect a diverse array of research interests and contributions to the field:

Observation of the electromagnetic field effect via charge-dependent directed flow in heavy-ion collisions at the Relativistic Heavy Ion Collider

STCF conceptual design report (Volume 1): Physics & detector

Reaction plane correlated triangular flow in collisions at GeV

CEPC Technical Design Report--Accelerator

The present and future of QCD

Longitudinal and transverse spin transfer to and hyperons in polarized collisions at

Jet-hadron correlations with respect to the event plane in GeV collisions in STAR

Results on Elastic Cross Sections in Proton–Proton Collisions at s= 510 GeV with the STAR Detector at RHIC

Xiaofeng Luo Information

University	Central China Normal University
Position	Institute of Particle Physics Wuhan 430079 China
Citations(all)	19674
Citations(since 2020)	12710
Cited By	11818
hIndex(all)	79
hIndex(since 2020)	61
i10Index(all)	229
i10Index(since 2020)	207
Email	Access Email
University Profile Page	Central China Normal University

Xiaofeng Luo Skills & Research Interests

Nuclear Physics

Particle Physics

QCD Phase Diagram

QCD Critical Point

Top articles of Xiaofeng Luo

Observation of the electromagnetic field effect via charge-dependent directed flow in heavy-ion collisions at the Relativistic Heavy Ion Collider

Authors

MI Abdulhamid,BE Aboona,J Adam,JR Adams,G Agakishiev,I Aggarwal,MM Aggarwal,Z Ahammed,A Aitbaev,I Alekseev,E Alpatov,A Aparin,S Aslam,J Atchison,GS Averichev,V Bairathi,JG Ball Cap,K Barish,P Bhagat,A Bhasin,S Bhatta,SR Bhosale,IG Bordyuzhin,JD Brandenburg,AV Brandin,XZ Cai,H Caines,M Calderón de la Barca Sánchez,D Cebra,J Ceska,I Chakaberia,BK Chan,Z Chang,A Chatterjee,D Chen,J Chen,JH Chen,Z Chen,J Cheng,Y Cheng,S Choudhury,W Christie,X Chu,HJ Crawford,G Dale-Gau,A Das,AP Dash,M Daugherity,TG Dedovich,IM Deppner,AA Derevschikov,A Dhamija,P Dixit,X Dong,JL Drachenberg,E Duckworth,JC Dunlop,J Engelage,G Eppley,S Esumi,O Evdokimov,O Eyser,R Fatemi,S Fazio,CJ Feng,Y Feng,E Finch,Y Fisyak,FA Flor,C Fu,T Gao,F Geurts,N Ghimire,A Gibson,K Gopal,X Gou,D Grosnick,A Gupta,A Hamed,Y Han,MD Harasty,JW Harris,H Harrison-Smith,W He,XH He,Y He,C Hu,Q Hu,Y Hu,H Huang,HZ Huang,SL Huang,T Huang,X Huang,Y Huang,TJ Humanic,D Isenhower,M Isshiki,WW Jacobs,A Jalotra,C Jena,Y Ji,J Jia,C Jin,X Ju,EG Judd,S Kabana,D Kalinkin,K Kang,D Kapukchyan,K Kauder,D Keane,A Kechechyan,A Kiselev,AG Knospe,HS Ko,L Kochenda,AA Korobitsin,A Yu Kraeva,P Kravtsov,L Kumar,MC Labonte,R Lacey,JM Landgraf,A Lebedev,R Lednicky,JH Lee,YH Leung,N Lewis,C Li,HS Li,W Li,X Li,Y Li,Z Li,X Liang,Y Liang,T Lin,Y Lin,C Liu,F Liu,G Liu,H Liu,L Liu,T Liu,X Liu,Y Liu,Z Liu,T Ljubicic,O Lomicky

Journal

Physical Review X

Published Date

2024/2/23

The deconfined quark-gluon plasma (QGP) created in relativistic heavy-ion collisions enables the exploration of the fundamental properties of matter under extreme conditions. Noncentral collisions can produce strong magnetic fields on the order of 10 18 G, which offers a probe into the electrical conductivity of the QGP. In particular, quarks and antiquarks carry opposite charges and receive contrary electromagnetic forces that alter their momenta. This phenomenon can be manifested in the collective motion of final-state particles, specifically in the rapidity-odd directed flow, denoted as v 1 (y). Here, we present the charge-dependent measurements of d v 1/d y near midrapidities for π±, K±, and p (p) in Au+ Au and isobar (Ru 44 96+ Ru 44 96 and Zr 40 96+ Zr 40 96) collisions at s NN= 200 GeV, and in Au+ Au collisions at 27 GeV, recorded by the STAR detector at the Relativistic Heavy Ion Collider. The combined …

STCF conceptual design report (Volume 1): Physics & detector

Authors

M Achasov,XC Ai,LP An,R Aliberti,Q An,XZ Bai,Y Bai,O Bakina,A Barnyakov,V Blinov,V Bobrovnikov,D Bodrov,A Bogomyagkov,A Bondar,I Boyko,ZH Bu,FM Cai,H Cai,JJ Cao,QH Cao,X Cao,Z Cao,Q Chang,KT Chao,DY Chen,H Chen,HX Chen,JF Chen,K Chen,LL Chen,P Chen,SL Chen,SM Chen,S Chen,SP Chen,W Chen,X Chen,XF Chen,XR Chen,Y Chen,YQ Chen,HY Cheng,J Cheng,S Cheng,TG Cheng,JP Dai,LY Dai,XC Dai,D Dedovich,A Denig,I Denisenko,JM Dias,DZ Ding,LY Dong,WH Dong,V Druzhinin,DS Du,YJ Du,ZG Du,LM Duan,D Epifanov,YL Fan,SS Fang,ZJ Fang,G Fedotovich,CQ Feng,X Feng,YT Feng,JL Fu,J Gao,YN Gao,PS Ge,CQ Geng,LS Geng,A Gilman,L Gong,T Gong,B Gou,W Gradl,JL Gu,A Guevara,LC Gui,AQ Guo,FK Guo,JC Guo,J Guo,YP Guo,ZH Guo,A Guskov,KL Han,L Han,M Han,XQ Hao,JB He,SQ He,XG He,YL He,ZB He,ZX Heng,BL Hou,TJ Hou,YR Hou,CY Hu,HM Hu,K Hu,RJ Hu,WH Hu,XH Hu,YC Hu,J Hua,GS Huang,JS Huang,M Huang,QY Huang,WQ Huang,XT Huang,XJ Huang,YB Huang,YS Huang,N Hüsken,V Ivanov,QP Ji,JJ Jia,S Jia,ZK Jia,HB Jiang,J Jiang,SZ Jiang,JB Jiao,Z Jiao,HJ Jing,XL Kang,XS Kang,BC Ke,M Kenzie,A Khoukaz,I Koop,E Kravchenko,A Kuzmin,Y Lei,E Levichev,CH Li,C Li,DY Li,F Li,G Li,G Li,HB Li,H Li,HN Li

Journal

Frontiers of Physics

Published Date

2024/2

The super τ-charm facility (STCF) is an electron–positron collider proposed by the Chinese particle physics community. It is designed to operate in a center-of-mass energy range from 2 to 7 GeV with a peak luminosity of 0.5 × 1035 cm−2·s−1 or higher. The STCF will produce a data sample about a factor of 100 larger than that of the present τ-charm factory — the BEPCII, providing a unique platform for exploring the asymmetry of matter-antimatter (charge-parity violation), in-depth studies of the internal structure of hadrons and the nature of non-perturbative strong interactions, as well as searching for exotic hadrons and physics beyond the Standard Model. The STCF project in China is under development with an extensive R&D program. This document presents the physics opportunities at the STCF, describes conceptual designs of the STCF detector system, and discusses future plans for detector R&D and physics …

Reaction plane correlated triangular flow in collisions at GeV

Authors

MI Abdulhamid,BE Aboona,J Adam,L Adamczyk,JR Adams,I Aggarwal,MM Aggarwal,Z Ahammed,EC Aschenauer,S Aslam,J Atchison,V Bairathi,JG Ball Cap,K Barish,R Bellwied,P Bhagat,A Bhasin,S Bhatta,SR Bhosale,J Bielcik,J Bielcikova,JD Brandenburg,C Broodo,XZ Cai,H Caines,M Calderón de la Barca Sánchez,D Cebra,J Ceska,I Chakaberia,P Chaloupka,BK Chan,Z Chang,A Chatterjee,D Chen,J Chen,JH Chen,Z Chen,J Cheng,Y Cheng,S Choudhury,W Christie,X Chu,HJ Crawford,M Csanád,G Dale-Gau,A Das,IM Deppner,A Dhamija,P Dixit,X Dong,JL Drachenberg,E Duckworth,JC Dunlop,J Engelage,G Eppley,S Esumi,O Evdokimov,O Eyser,R Fatemi,S Fazio,CJ Feng,Y Feng,E Finch,Y Fisyak,FA Flor,C Fu,CA Gagliardi,T Galatyuk,T Gao,F Geurts,N Ghimire,A Gibson,K Gopal,X Gou,D Grosnick,A Gupta,W Guryn,A Hamed,Y Han,S Harabasz,MD Harasty,JW Harris,H Harrison-Smith,W He,XH He,Y He,N Herrmann,L Holub,C Hu,Q Hu,Y Hu,H Huang,HZ Huang,SL Huang,T Huang,X Huang,Y Huang,TJ Humanic,M Isshiki,WW Jacobs,A Jalotra,C Jena,A Jentsch,Y Ji,J Jia,C Jin,X Ju,EG Judd,S Kabana,D Kalinkin,K Kang,D Kapukchyan,K Kauder,D Keane,A Khanal,YV Khyzhniak,DP Kikoła,D Kincses,I Kisel,A Kiselev,AG Knospe,HS Ko,LK Kosarzewski,L Kumar,MC Labonte,R Lacey,JM Landgraf,J Lauret,A Lebedev,JH Lee,YH Leung,N Lewis,C Li,D Li,HS Li,H Li,W Li,X Li,Y Li,Z Li,X Liang,Y Liang,R Licenik,T Lin,Y Lin,MA Lisa,C Liu,G Liu,H Liu,L Liu

Journal

Physical Review C

Published Date

2024/4/19

We measure triangular flow relative to the reaction plane at 3 GeV center-of-mass energy in Au+ Au collisions at the BNL Relativistic Heavy Ion Collider. A significant v 3 signal for protons is observed, which increases for higher rapidity, higher transverse momentum, and more peripheral collisions. The triangular flow is essentially rapidity-odd with a slope at midrapidity, d v 3/d y|(y= 0), opposite in sign compared to the slope for directed flow. No significant v 3 signal is observed for charged pions and kaons. Comparisons with models suggest that a mean field potential is required to describe these results, and that the triangular shape of the participant nucleons is the result of stopping and nuclear geometry.

CEPC Technical Design Report--Accelerator

Authors

Waleed Abdallah,Konstantin Afanaciev,Shakeel Ahmad,Ijaz Ahmed,Xiaocong Ai,Abid Aleem,Wolfgang Altmannshofer,Fabio Alves,Rui An,Weiming An,Daniele Paolo Anderle,Stefan Antusch,Yasuo Arai,Andrej Arbuzov,Abdesslam Arhrib,Mustafa Ashry,Sha Bai,Yang Bai,Yu Bai,Vipul Bairathi,Csaba Balazs,Philip Bambade,Yong Ban,Triparno Bandyopadhyay,Shou-Shan Bao,Desmond P Barber,Ayse Bat,Varvara Batozskaya,Subash Chandra Behera,Alexander Belyaev,Michele Bertucci,Xiao-Jun Bi,Yuanjie Bi,Tianjian Bian,Fabrizio Bianchi,Thomas Biekotter,Michela Biglietti,Shalva Bilanishvili,Deng Binglin,Denis Bodrov,Anton Bogomyagkov,Serge Bondarenko,Stewart Boogert,Maarten Boonekamp,Marcello Borri,Angelo Bosotti,Vincent Boudry,Mohammed Boukidi,Igor Boyko,Ivanka Bozovic,Giuseppe Bozzi,Jean-Claude Brient,Anastasiia Budzinskaya,Masroor Bukhari,Vladimir Bytev,Giacomo Cacciapaglia,Haiying Cai,Hua Cai,Huacheng Cai,Wenyong Cai,Wujun Cai,Yijian Cai,Yizhou Cai,Yuchen Cai,Lorenzo Calibbi,Junsong Cang,Guofu Cao,Jianshe Cao,Antoine Chance,Xuejun Chang,Yue Chang,Zhe Chang,Wei Chao,Auttakit Chatrabhuti,Yimin Che,Yuzhi Che,Bin Chen,Boping Chen,Chunhui Chen,Danping Chen,Fuqing Chen,Fusan Chen,Gang Chen,Guoming Chen,Hua-Xing Chen,Huirun Chen,Jinhui Chen,Ji-Yuan Chen,Kai Chen,Mali Chen,Mingjun Chen,Mingshui Chen,Ning Chen,Shanhong Chen,Shanzhen Chen,Shao-Long Chen,Shaomin Chen,Shiqiang Chen,Tianlu Chen,Wei Chen,Xiang Chen,Xiaoyu Chen,Xin Chen,Xun Chen,Xurong Chen,Ye Chen,Ying Chen,Yukai Chen,Zelin Chen,Zilin Chen,Hok Chuen Cheng,Huajie Cheng,Shan Cheng,Tongguang Cheng,Yunlong Chi,Pietro Chimenti,Wen Han Chiu,Guk Cho,Ming-Chung Chu,Xiaotong Chu,Ziliang Chu,Guglielmo Coloretti,Andreas Crivellin,Hanhua Cui,Xiaohao Cui,Zhaoyuan Cui,Brunella d'Anzi,Ling-Yun Dai,Xinchen Dai,Xuwen Dai,Antonio de Maria,Nicola de Filippis,Christophe de la Taille,Francesca de Mori,Chiara de Sio,Elisa del Core,Shuangxue Deng,Wei-Tian Deng,Zhi Deng,Ziyan Deng,Bhupal Dev,Tang Dewen,Biagio Di Micco,Ran Ding,Siqin Ding,Yadong Ding,Haiyi Dong,Jianing Dong,Jing Dong,Lan Dong

Published Date

2024/1/9

The Circular Electron Positron Collider (CEPC) is a large scientific project initiated and hosted by China, fostered through extensive collaboration with international partners. The complex comprises four accelerators: a 30 GeV Linac, a 1.1 GeV Damping Ring, a Booster capable of achieving energies up to 180 GeV, and a Collider operating at varying energy modes (Z, W, H, and ttbar). The Linac and Damping Ring are situated on the surface, while the Booster and Collider are housed in a 100 km circumference underground tunnel, strategically accommodating future expansion with provisions for a Super Proton Proton Collider (SPPC). The CEPC primarily serves as a Higgs factory. In its baseline design with synchrotron radiation (SR) power of 30 MW per beam, it can achieve a luminosity of 5e34 /cm^2/s^1, resulting in an integrated luminosity of 13 /ab for two interaction points over a decade, producing 2.6 million Higgs bosons. Increasing the SR power to 50 MW per beam expands the CEPC's capability to generate 4.3 million Higgs bosons, facilitating precise measurements of Higgs coupling at sub-percent levels, exceeding the precision expected from the HL-LHC by an order of magnitude. This Technical Design Report (TDR) follows the Preliminary Conceptual Design Report (Pre-CDR, 2015) and the Conceptual Design Report (CDR, 2018), comprehensively detailing the machine's layout and performance, physical design and analysis, technical systems design, R&D and prototyping efforts, and associated civil engineering aspects. Additionally, it includes a cost estimate and a preliminary construction timeline, establishing a framework for …

The present and future of QCD

Authors

P Achenbach,D Adhikari,A Afanasev,F Afzal,CA Aidala,A Al-Bataineh,DK Almaalol,M Amaryan,D Androić,WR Armstrong,M Arratia,J Arrington,A Asaturyan,EC Aschenauer,H Atac,H Avakian,T Averett,C Ayerbe Gayoso,X Bai,KN Barish,N Barnea,G Basar,M Battaglieri,AA Baty,I Bautista,A Bazilevsky,C Beattie,SC Behera,V Bellini,R Bellwied,JF Benesch,F Benmokhtar,CA Bernardes,JC Bernauer,H Bhatt,S Bhatta,M Boer,TJ Boettcher,SA Bogacz,HJ Bossi,JD Brandenburg,EJ Brash,RA Briceño,WJ Briscoe,SJ Brodsky,DA Brown,VD Burkert,H Caines,IA Cali,A Camsonne,DS Carman,J Caylor,DS Cerci,S Cerci,M Chamizo Llatas,S Chatterjee,JP Chen,Y Chen,Y-C Chen,Y-T Chien,P-C Chou,X Chu,E Chudakov,E Cline,IC Cloët,PL Cole,ME Connors,M Constantinou,W Cosyn,S Covrig Dusa,R Cruz-Torres,U d'Alesio,C da Silva,Z Davoudi,CT Dean,DJ Dean,M Demarteau,A Deshpande,W Detmold,A Deur,BR Devkota,S Dhital,M Diefenthaler,S Dobbs,M Döring,X Dong,R Dotel,KA Dow,EJ Downie,JL Drachenberg,A Dumitru,JC Dunlop,R Dupre,JM Durham,D Dutta,RG Edwards,RJ Ehlers,L El Fassi,M Elaasar,L Elouadrhiri,M Engelhardt,R Ent,S Esumi,O Evdokimov,O Eyser,C Fanelli,R Fatemi,IP Fernando,FA Flor,N Fomin,AD Frawley,T Frederico,RJ Fries,C Gal,BR Gamage,L Gamberg,H Gao,D Gaskell,F Geurts,Y Ghandilyan,N Ghimire,R Gilman,C Gleason,K Gnanvo,RW Gothe,SV Greene,HW Grießhammer,SK Grossberndt,B Grube,DC Hackett,TJ Hague,H Hakobyan,J-O Hansen,Y Hatta,M Hattawy,LB Havener,O Hen,W Henry,DW Higinbotham,TJ Hobbs,AM Hodges,T Holmstrom,B Hong,T Horn,CR Howell,HZ Huang,M Huang,S Huang,GM Huber,CE Hyde

Journal

Nuclear Physics A

Published Date

2024/4/15

This White Paper presents an overview of the current status and future perspective of QCD research, based on the community inputs and scientific conclusions from the 2022 Hot and Cold QCD Town Meeting. We present the progress made in the last decade toward a deep understanding of both the fundamental structure of the sub-atomic matter of nucleon and nucleus in cold QCD, and the hot QCD matter in heavy ion collisions. We identify key questions of QCD research and plausible paths to obtaining answers to those questions in the near future, hence defining priorities of our research over the coming decades.

Longitudinal and transverse spin transfer to and hyperons in polarized collisions at

Authors

MI Abdulhamid,BE Aboona,J Adam,L Adamczyk,JR Adams,I Aggarwal,MM Aggarwal,Z Ahammed,DM Anderson,EC Aschenauer,S Aslam,J Atchison,V Bairathi,W Baker,JG Ball Cap,K Barish,R Bellwied,P Bhagat,A Bhasin,S Bhatta,J Bielcik,J Bielcikova,JD Brandenburg,XZ Cai,H Caines,M Calderón de la Barca Sánchez,D Cebra,J Ceska,I Chakaberia,P Chaloupka,BK Chan,Z Chang,A Chatterjee,D Chen,J Chen,JH Chen,Z Chen,J Cheng,Y Cheng,S Choudhury,W Christie,X Chu,HJ Crawford,M Csanád,G Dale-Gau,A Das,M Daugherity,IM Deppner,A Dhamija,L Di Carlo,P Dixit,X Dong,JL Drachenberg,E Duckworth,JC Dunlop,J Engelage,G Eppley,S Esumi,O Evdokimov,A Ewigleben,O Eyser,R Fatemi,S Fazio,CJ Feng,Y Feng,E Finch,Y Fisyak,FA Flor,C Fu,CA Gagliardi,T Galatyuk,T Gao,F Geurts,N Ghimire,A Gibson,K Gopal,X Gou,D Grosnick,A Gupta,W Guryn,A Hamed,Y Han,S Harabasz,MD Harasty,JW Harris,H Harrison-Smith,W He,XH He,Y He,N Herrmann,L Holub,C Hu,Q Hu,Y Hu,H Huang,HZ Huang,SL Huang,T Huang,X Huang,Y Huang,TJ Humanic,D Isenhower,M Isshiki,WW Jacobs,A Jalotra,C Jena,A Jentsch,Y Ji,J Jia,C Jin,X Ju,EG Judd,S Kabana,ML Kabir,S Kagamaster,D Kalinkin,K Kang,D Kapukchyan,K Kauder,D Keane,M Kelsey,YV Khyzhniak,DP Kikoła,B Kimelman,D Kincses,I Kisel,A Kiselev,AG Knospe,HS Ko,LK Kosarzewski,L Kramarik,L Kumar,S Kumar,R Kunnawalkam Elayavalli,R Lacey,JM Landgraf,J Lauret,A Lebedev,JH Lee,YH Leung,N Lewis,C Li,W Li,X Li,Y Li,Z Li,X Liang,Y Liang,R Licenik,T Lin

Journal

Physical Review D

Published Date

2024/1/5

The longitudinal and transverse spin transfers to Λ (Λ) hyperons in polarized proton-proton collisions are expected to be sensitive to the helicity and transversity distributions, respectively, of (anti) strange quarks in the proton, and to the corresponding polarized fragmentation functions. We report improved measurements of the longitudinal spin transfer coefficient, D L L, and the transverse spin transfer coefficient, D T T, to Λ and Λin polarized proton-proton collisions at s= 200 GeV by the STAR experiment at RHIC. The dataset includes longitudinally polarized proton-proton collisions with an integrated luminosity of 52 pb− 1, and transversely polarized proton-proton collisions with a similar integrated luminosity. Both datasets have about twice the statistics of previous results and cover a kinematic range of| η Λ (Λ)|< 1.2 and transverse momentum p T, Λ (Λ) up to 8 GeV/c. We also report the first measurements of the …

Jet-hadron correlations with respect to the event plane in GeV collisions in STAR

Authors

MI Abdulhamid,BE Aboona,J Adam,L Adamczyk,JR Adams,I Aggarwal,MM Aggarwal,Z Ahammed,EC Aschenauer,S Aslam,J Atchison,V Bairathi,JG Ball Cap,K Barish,R Bellwied,P Bhagat,A Bhasin,S Bhatta,SR Bhosale,J Bielcik,J Bielcikova,JD Brandenburg,XZ Cai,H Caines,M Calderón de la Barca Sánchez,D Cebra,J Ceska,I Chakaberia,P Chaloupka,BK Chan,Z Chang,A Chatterjee,D Chen,J Chen,JH Chen,Z Chen,J Cheng,Y Cheng,S Choudhury,W Christie,X Chu,HJ Crawford,M Csanád,G Dale-Gau,A Das,M Daugherity,IM Deppner,A Dhamija,P Dixit,X Dong,JL Drachenberg,E Duckworth,JC Dunlop,J Engelage,G Eppley,S Esumi,O Evdokimov,O Eyser,R Fatemi,S Fazio,CJ Feng,Y Feng,E Finch,Y Fisyak,FA Flor,C Fu,CA Gagliardi,T Galatyuk,T Gao,F Geurts,N Ghimire,A Gibson,K Gopal,X Gou,D Grosnick,A Gupta,W Guryn,A Hamed,Y Han,S Harabasz,MD Harasty,JW Harris,H Harrison-Smith,W He,XH He,Y He,N Herrmann,L Holub,C Hu,Q Hu,Y Hu,H Huang,HZ Huang,SL Huang,T Huang,X Huang,Y Huang,TJ Humanic,D Isenhower,M Isshiki,WW Jacobs,A Jalotra,C Jena,A Jentsch,Y Ji,J Jia,C Jin,X Ju,EG Judd,S Kabana,D Kalinkin,K Kang,D Kapukchyan,K Kauder,D Keane,YV Khyzhniak,DP Kikoła,D Kincses,I Kisel,A Kiselev,AG Knospe,HS Ko,LK Kosarzewski,L Kumar,MC Labonte,R Lacey,JM Landgraf,J Lauret,A Lebedev,JH Lee,YH Leung,N Lewis,C Li,HS Li,W Li,X Li,Y Li,Z Li,X Liang,Y Liang,R Licenik,T Lin,Y Lin,MA Lisa,C Liu,G Liu,H Liu,L Liu,T Liu,X Liu

Journal

Physical Review C

Published Date

2024/4/9

Angular distributions of charged particles relative to jet axes are studied in s N N= 200 GeV Au+ Au collisions as a function of the jet orientation with respect to the event plane. This differential study tests the expected path-length dependence of energy loss experienced by a hard-scattered parton as it traverses the hot and dense medium formed in heavy-ion collisions. A second-order event plane is used in the analysis as an experimental estimate of the reaction plane formed by the collision impact parameter and the beam direction. Charged-particle jets with 15< p T, jet< 20 and 20< p T, jet< 40 GeV/c were reconstructed with the anti-k T algorithm with radius parameter setting of R= 0.4 in the 20–50% centrality bin to maximize the initial-state eccentricity of the interaction region. The reaction plane fit method is implemented to remove the flow-modulated background with better precision than prior methods. Yields …

Results on Elastic Cross Sections in Proton–Proton Collisions at s= 510 GeV with the STAR Detector at RHIC

Authors

Journal

Physics Letters B

Published Date

2024/4/5

We report results on an elastic cross section measurement in proton–proton collisions at a center-of-mass energy s= 510 GeV, obtained with the Roman Pot setup of the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). The elastic differential cross section is measured in the four-momentum transfer squared range 0.23≤− t≤ 0.67 GeV 2. This is the only measurement of the proton-proton elastic cross section in this t range for collision energies above the Intersecting Storage Rings (ISR) and below the Large Hadron Collider (LHC) colliders. We find that a constant slope B does not fit the data in the aforementioned t range, and we obtain a much better fit using a second-order polynomial for B (t). This is the first measurement below the LHC energies for which the non-constant behavior B (t) is observed. The t dependence of B is determined using six subintervals of t in the STAR measured t range, and is in …

Search for the chiral magnetic effect in Au+ Au collisions at sNN= 27 GeV with the STAR forward event plane detectors

Authors

BE Aboona,Jaroslav Adam,Leszek Adamczyk,JR Adams,Ishu Aggarwal,MM Aggarwal,Zubayer Ahammed,DM Anderson,Elke-Caroline Aschenauer,Joseph Atchison,V Bairathi,W Baker,JG Ball Cap,K Barish,R Bellwied,P Bhagat,A Bhasin,S Bhatta,J Bielcik,J Bielcikova,JD Brandenburg,XZ Cai,H Caines,M Calderón de la Barca Sánchez,D Cebra,J Ceska,I Chakaberia,P Chaloupka,BK Chan,Z Chang,D Chen,J Chen,JH Chen,Z Chen,J Cheng,Y Cheng,S Choudhury,W Christie,X Chu,HJ Crawford,M Csanád,G Dale-Gau,A Das,M Daugherity,IM Deppner,A Dhamija,L Di Carlo,L Didenko,P Dixit,X Dong,JL Drachenberg,E Duckworth,JC Dunlop,J Engelage,G Eppley,S Esumi,O Evdokimov,A Ewigleben,O Eyser,R Fatemi,S Fazio,CJ Feng,Y Feng,E Finch,Y Fisyak,FA Flor,C Fu,CA Gagliardi,T Galatyuk,F Geurts,N Ghimire,A Gibson,K Gopal,X Gou,D Grosnick,A Gupta,W Guryn,A Hamed,Y Han,S Harabasz,MD Harasty,JW Harris,H Harrison,W He,XH He,Y He,N Herrmann,L Holub,C Hu,Q Hu,Y Hu,H Huang,HZ Huang,SL Huang,T Huang,X Huang,Y Huang,TJ Humanic,D Isenhower,M Isshiki,WW Jacobs,A Jalotra,C Jena,A Jentsch,Y Ji,J Jia,C Jin,X Ju,EG Judd,S Kabana,ML Kabir,S Kagamaster,D Kalinkin,K Kang,D Kapukchyan,K Kauder,HW Ke,D Keane,M Kelsey,YV Khyzhniak,DP Kikoła,B Kimelman,D Kincses,I Kisel,A Kiselev,AG Knospe,HS Ko,LK Kosarzewski,L Kramarik,L Kumar,S Kumar,R Kunnawalkam Elayavalli,R Lacey,JM Landgraf,J Lauret,A Lebedev,JH Lee,YH Leung,N Lewis,C Li,W Li,X Li,Y Li,Z Li,X Liang,Y Liang,R Licenik,T Lin,MA Lisa,C Liu

Journal

Physics Letters B

Published Date

2023/4/10

A decisive experimental test of the Chiral Magnetic Effect (CME) is considered one of the major scientific goals at the Relativistic Heavy-Ion Collider (RHIC) towards understanding the nontrivial topological fluctuations of the Quantum Chromodynamics vacuum. In heavy-ion collisions, the CME is expected to result in a charge separation phenomenon across the reaction plane, whose strength could be strongly energy dependent. The previous CME searches have been focused on top RHIC energy collisions. In this Letter, we present a low energy search for the CME in Au+ Au collisions at s NN= 27 GeV. We measure elliptic flow scaled charge-dependent correlators relative to the event planes that are defined at both mid-rapidity| η|< 1.0 and at forward rapidity 2.1<| η|< 5.1. We compare the results based on the directed flow plane (Ψ 1) at forward rapidity and the elliptic flow plane (Ψ 2) at both central and forward …

Measurement of electrons from open heavy-flavor hadron decays in Au+Au collisions at = 200 GeV with the STAR detector

Authors

MI Abdulhamid,BE Aboona,Jaroslav Adam,Leszek Adamczyk,JR Adams,I Aggarwal,MM Aggarwal,Z Ahammed,DM Anderson,EC Aschenauer,S Aslam,J Atchison,V Bairathi,W Baker,JG Ball Cap,K Barish,R Bellwied,P Bhagat,A Bhasin,S Bhatta,J Bielcik,J Bielcikova,JD Brandenburg,XZ Cai,H Caines,M Calderón de la Barca Sánchez,D Cebra,J Ceska,I Chakaberia,P Chaloupka,BK Chan,Z Chang,A Chatterjee,D Chen,J Chen,JH Chen,Z Chen,J Cheng,Y Cheng,S Choudhury,W Christie,X Chu,HJ Crawford,M Csanád,G Dale-Gau,A Das,M Daugherity,IM Deppner,A Dhamija,L Di Carlo,L Didenko,P Dixit,X Dong,JL Drachenberg,E Duckworth,JC Dunlop,J Engelage,G Eppley,S Esumi,O Evdokimov,A Ewigleben,O Eyser,R Fatemi,S Fazio,CJ Feng,Y Feng,E Finch,Y Fisyak,FA Flor,C Fu,CA Gagliardi,T Galatyuk,F Geurts,N Ghimire,A Gibson,K Gopal,X Gou,D Grosnick,A Gupta,W Guryn,A Hamed,Y Han,S Harabasz,MD Harasty,JW Harris,H Harrison-Smith,W He,XH He,Y He,N Herrmann,L Holub,C Hu,Q Hu,Y Hu,H Huang,HZ Huang,SL Huang,T Huang,X Huang,Y Huang,TJ Humanic,D Isenhower,M Isshiki,WW Jacobs,A Jalotra,C Jena,A Jentsch,Y Ji,J Jia,C Jin,X Ju,EG Judd,S Kabana,ML Kabir,S Kagamaster,D Kalinkin,K Kang,D Kapukchyan,D Keane,M Kelsey,YV Khyzhniak,DP Kikoła,B Kimelman,D Kincses,I Kisel,A Kiselev,AG Knospe,HS Ko,LK Kosarzewski,L Kramarik,L Kumar,S Kumar,R Kunnawalkam Elayavalli,R Lacey,JM Landgraf,J Lauret,A Lebedev,JH Lee,YH Leung,N Lewis,C Li,W Li,X Li,Y Li,Z Li,X Liang,Y Liang,R Licenik,T Lin,MA Lisa

Journal

Journal of High Energy Physics

Published Date

2023/6

We report a new measurement of the production of electrons from open heavy-flavor hadron decays (HFEs) at mid-rapidity (| y|< 0.7) in Au+ Au collisions at= 200 GeV. Invariant yields of HFEs are measured for the transverse momentum range of 3. 5< p T< 9 GeV/c in various configurations of the collision geometry. The HFE yields in head-on Au+ Au collisions are suppressed by approximately a factor of 2 compared to that in p+ p collisions scaled by the average number of binary collisions, indicating strong interactions between heavy quarks and the hot and dense medium created in heavy-ion collisions. Comparison of these results with models provides additional tests of theoretical calculations of heavy quark energy loss in the quark-gluon plasma.

Event-by-event correlations between Λ (Λ¯) hyperon global polarization and handedness with charged hadron azimuthal separation in Au+ Au collisions at s N N= 27 GeV from STAR

Authors

MI Abdulhamid,BE Aboona,J Adam,JR Adams,G Agakishiev,I Aggarwal,MM Aggarwal,Z Ahammed,A Aitbaev,I Alekseev,DM Anderson,A Aparin,S Aslam,J Atchison,GS Averichev,V Bairathi,W Baker,JG Ball Cap,K Barish,P Bhagat,A Bhasin,S Bhatta,IG Bordyuzhin,JD Brandenburg,AV Brandin,XZ Cai,H Caines,M Calderón de la Barca Sánchez,D Cebra,J Ceska,I Chakaberia,BK Chan,Z Chang,A Chatterjee,D Chen,J Chen,JH Chen,Z Chen,J Cheng,Y Cheng,S Choudhury,W Christie,X Chu,HJ Crawford,G Dale-Gau,A Das,M Daugherity,TG Dedovich,IM Deppner,AA Derevschikov,A Dhamija,L Di Carlo,L Didenko,P Dixit,X Dong,JL Drachenberg,E Duckworth,JC Dunlop,J Engelage,G Eppley,S Esumi,O Evdokimov,A Ewigleben,O Eyser,R Fatemi,S Fazio,CJ Feng,Y Feng,E Finch,Y Fisyak,FA Flor,C Fu,F Geurts,N Ghimire,A Gibson,K Gopal,X Gou,D Grosnick,A Gupta,A Hamed,Y Han,MD Harasty,JW Harris,H Harrison-Smith,W He,XH He,Y He,C Hu,Q Hu,Y Hu,H Huang,HZ Huang,SL Huang,T Huang,X Huang,Y Huang,TJ Humanic,D Isenhower,M Isshiki,WW Jacobs,A Jalotra,C Jena,Y Ji,J Jia,C Jin,X Ju,EG Judd,S Kabana,ML Kabir,D Kalinkin,K Kang,D Kapukchyan,D Keane,A Kechechyan,M Kelsey,B Kimelman,A Kiselev,AG Knospe,HS Ko,L Kochenda,AA Korobitsin,P Kravtsov,L Kumar,S Kumar,R Kunnawalkam Elayavalli,R Lacey,JM Landgraf,A Lebedev,R Lednicky,JH Lee,YH Leung,N Lewis,C Li,W Li,X Li,Y Li,Z Li,X Liang,Y Liang,T Lin,C Liu,F Liu,G Liu,H Liu,L Liu,T Liu,X Liu,Y Liu,Z Liu,T Ljubicic

Journal

Physical Review C

Published Date

2023/7/21

Global polarizations (P) of Λ(Λ) hyperons have been observed in noncentral heavy-ion collisions. The strong magnetic field primarily created by the spectator protons in such collisions would split the Λ and Λglobal polarizations (Δ P= P Λ− P Λ< 0). Additionally, quantum chromodynamics predicts topological charge fluctuations in vacuum, resulting in a chirality imbalance or parity violation in a local domain. This would give rise to an imbalance (Δ n= N L− N R〈 N L+ N R〉≠ 0) between left-and right-handed Λ (Λ) as well as a charge separation along the magnetic field, referred to as the chiral magnetic effect (CME). This charge separation can be characterized by the parity-even azimuthal correlator (Δ γ) and parity-odd azimuthal harmonic observable (Δ a 1). Measurements of Δ P, Δ γ, and Δ a 1 have not led to definitive conclusions concerning the CME or the magnetic field, and Δ n has not been measured …

Pion, kaon, and (anti)proton production in collisions at GeV measured with the STAR detector

Authors

MS Abdallah,BE Aboona,J Adam,JR Adams,JK Adkins,G Agakishiev,I Aggarwal,MM Aggarwal,Z Ahammed,A Aitbaev,I Alekseev,DM Anderson,A Aparin,J Atchison,GS Averichev,V Bairathi,W Baker,JG Ball Cap,K Barish,P Bhagat,A Bhasin,S Bhatta,IG Bordyuzhin,JD Brandenburg,AV Brandin,XZ Cai,H Caines,M Calderón de la Barca Sánchez,D Cebra,I Chakaberia,BK Chan,Z Chang,S Chattopadhyay,D Chen,J Chen,JH Chen,X Chen,Z Chen,J Cheng,S Choudhury,W Christie,X Chu,HJ Crawford,M Daugherity,TG Dedovich,IM Deppner,AA Derevschikov,A Dhamija,L Di Carlo,L Didenko,P Dixit,X Dong,JL Drachenberg,E Duckworth,JC Dunlop,J Engelage,G Eppley,S Esumi,O Evdokimov,A Ewigleben,O Eyser,R Fatemi,FM Fawzi,S Fazio,CJ Feng,Y Feng,E Finch,Y Fisyak,A Francisco,C Fu,F Geurts,N Ghimire,A Gibson,K Gopal,X Gou,D Grosnick,A Gupta,A Hamed,Y Han,MD Harasty,JW Harris,H Harrison,S He,W He,XH He,Y He,S Heppelmann,E Hoffman,C Hu,Q Hu,Y Hu,H Huang,HZ Huang,SL Huang,T Huang,X Huang,Y Huang,TJ Humanic,D Isenhower,M Isshiki,WW Jacobs,C Jena,Y Ji,J Jia,K Jiang,C Jin,X Ju,EG Judd,S Kabana,ML Kabir,D Kalinkin,K Kang,D Kapukchyan,K Kauder,HW Ke,D Keane,A Kechechyan,M Kelsey,B Kimelman,A Kiselev,AG Knospe,HS Ko,L Kochenda,AA Korobitsin,P Kravtsov,L Kumar,S Kumar,R Kunnawalkam Elayavalli,JH Kwasizur,R Lacey,S Lan,JM Landgraf,A Lebedev,R Lednicky,JH Lee,YH Leung,N Lewis,C Li,W Li,X Li,Y Li,Z Li,X Liang,Y Liang,T Lin,Y Lin,F Liu,H Liu,T Liu,X Liu

Journal

Physical Review C

Published Date

2023/2/3

We present the first measurements of transverse momentum spectra of π±, K±, p (p) at midrapidity (| y|< 0.1) in U+ U collisions at s N N= 193 GeV with the STAR detector at the Relativistic Heavy Ion Collider (RHIC). The centrality dependence of particle yields, average transverse momenta, particle ratios and kinetic freeze-out parameters are discussed. The results are compared with the published results from Au+ Au collisions at s N N= 200 GeV in STAR. The results are also compared to those from A Multi-Phase Transport (ampt) model.

Hyperon Polarization along the Beam Direction Relative to the Second and Third Harmonic Event Planes in Isobar Collisions at

Authors

MI Abdulhamid,BE Aboona,Jaroslav Adam,JR Adams,Geydar Agakishiev,Ishu Aggarwal,MM Aggarwal,Zubayer Ahammed,Alisher Aitbaev,Igor Alekseev,DM Anderson,A Aparin,S Aslam,J Atchison,GS Averichev,V Bairathi,W Baker,JG Ball Cap,K Barish,P Bhagat,A Bhasin,S Bhatta,IG Bordyuzhin,JD Brandenburg,AV Brandin,XZ Cai,H Caines,M Calderón de la Barca Sánchez,D Cebra,J Ceska,I Chakaberia,BK Chan,Z Chang,A Chatterjee,D Chen,J Chen,JH Chen,Z Chen,J Cheng,Y Cheng,S Choudhury,W Christie,X Chu,HJ Crawford,G Dale-Gau,A Das,M Daugherity,TG Dedovich,IM Deppner,AA Derevschikov,A Dhamija,L Di Carlo,P Dixit,X Dong,JL Drachenberg,E Duckworth,JC Dunlop,J Engelage,G Eppley,S Esumi,O Evdokimov,A Ewigleben,O Eyser,R Fatemi,S Fazio,CJ Feng,Y Feng,E Finch,Y Fisyak,FA Flor,C Fu,T Gao,F Geurts,N Ghimire,A Gibson,K Gopal,X Gou,D Grosnick,A Gupta,A Hamed,Y Han,MD Harasty,JW Harris,H Harrison-Smith,W He,XH He,Y He,C Hu,Q Hu,Y Hu,H Huang,HZ Huang,SL Huang,T Huang,X Huang,Y Huang,TJ Humanic,D Isenhower,M Isshiki,WW Jacobs,A Jalotra,C Jena,Y Ji,J Jia,C Jin,X Ju,EG Judd,S Kabana,ML Kabir,D Kalinkin,K Kang,D Kapukchyan,K Kauder,D Keane,A Kechechyan,M Kelsey,B Kimelman,A Kiselev,AG Knospe,HS Ko,L Kochenda,AA Korobitsin,P Kravtsov,L Kumar,S Kumar,R Kunnawalkam Elayavalli,R Lacey,JM Landgraf,A Lebedev,R Lednicky,JH Lee,YH Leung,N Lewis,C Li,W Li,X Li,Y Li,Z Li,X Liang,Y Liang,T Lin,C Liu,F Liu,G Liu,H Liu,L Liu,T Liu,X Liu,Y Liu,Z Liu

Journal

Physical review letters

Published Date

2023/11/14

The polarization of Λ and Λhyperons along the beam direction has been measured relative to the second and third harmonic event planes in isobar Ru+ Ru and Zr+ Zr collisions at s N N= 200 GeV. This is the first experimental evidence of the hyperon polarization by the triangular flow originating from the initial density fluctuations. The amplitudes of the sine modulation for the second and third harmonic results are comparable in magnitude, increase from central to peripheral collisions, and show a mild p T dependence. The azimuthal angle dependence of the polarization follows the vorticity pattern expected due to elliptic and triangular anisotropic flow, and qualitatively disagrees with most hydrodynamic model calculations based on thermal vorticity and shear induced contributions. The model results based on one of existing implementations of the shear contribution lead to a correct azimuthal angle dependence …

Beam Energy Dependence of Fifth- and Sixth-Order Net-Proton Number Fluctuations in Collisions at RHIC

Authors

BE Aboona,Jaroslav Adam,Leszek Adamczyk,JR Adams,Ishu Aggarwal,MM Aggarwal,Zubayer Ahammed,DM Anderson,Elke-Caroline Aschenauer,Joseph Atchison,V Bairathi,W Baker,JG Ball Cap,K Barish,R Bellwied,P Bhagat,A Bhasin,S Bhatta,J Bielcik,J Bielcikova,JD Brandenburg,XZ Cai,H Caines,M Calderón de la Barca Sánchez,D Cebra,J Ceska,I Chakaberia,P Chaloupka,BK Chan,Z Chang,D Chen,J Chen,JH Chen,Z Chen,J Cheng,Y Cheng,S Choudhury,W Christie,X Chu,HJ Crawford,M Csanád,G Dale-Gau,A Das,M Daugherity,IM Deppner,A Dhamija,L Di Carlo,L Didenko,P Dixit,X Dong,JL Drachenberg,E Duckworth,JC Dunlop,J Engelage,G Eppley,S Esumi,O Evdokimov,A Ewigleben,O Eyser,R Fatemi,S Fazio,CJ Feng,Y Feng,E Finch,Y Fisyak,FA Flor,C Fu,CA Gagliardi,T Galatyuk,F Geurts,N Ghimire,A Gibson,K Gopal,X Gou,D Grosnick,A Gupta,W Guryn,A Hamed,Y Han,S Harabasz,MD Harasty,JW Harris,H Harrison,W He,XH He,Y He,S Heppelmann,N Herrmann,L Holub,C Hu,Q Hu,Y Hu,H Huang,HZ Huang,SL Huang,T Huang,X Huang,Y Huang,TJ Humanic,D Isenhower,M Isshiki,WW Jacobs,A Jalotra,C Jena,A Jentsch,Y Ji,J Jia,C Jin,X Ju,EG Judd,S Kabana,ML Kabir,S Kagamaster,D Kalinkin,K Kang,D Kapukchyan,K Kauder,HW Ke,D Keane,M Kelsey,YV Khyzhniak,DP Kikoła,B Kimelman,D Kincses,I Kisel,A Kiselev,AG Knospe,HS Ko,LK Kosarzewski,L Kramarik,L Kumar,S Kumar,R Kunnawalkam Elayavalli,R Lacey,JM Landgraf,J Lauret,A Lebedev,JH Lee,YH Leung,N Lewis,C Li,W Li,X Li,Y Li,Z Li,X Liang,Y Liang,R Licenik,T Lin,MA Lisa

Journal

Physical review letters

Published Date

2023/2/24

We report the beam energy and collision centrality dependence of fifth and sixth order cumulants (C 5, C 6) and factorial cumulants (κ 5, κ 6) of net-proton and proton number distributions, from center-of-mass energy (s N N) 3 GeV to 200 GeV Au+ Au collisions at RHIC. Cumulant ratios of net-proton (taken as proxy for net-baryon) distributions generally follow the hierarchy expected from QCD thermodynamics, except for the case of collisions at 3 GeV. The measured values of C 6/C 2 for 0%–40% centrality collisions show progressively negative trend with decreasing energy, while it is positive for the lowest energy studied. These observed negative signs are consistent with QCD calculations (for baryon chemical potential, μ B≤ 110 MeV) which contains the crossover transition range. In addition, for energies above 7.7 GeV, the measured proton κ n, within uncertainties, does not support the two-component (Poisson …

Measurements of dielectron production in collisions at , 39, and 62.4 GeV from the STAR experiment

Authors

MI Abdulhamid,BE Aboona,J Adam,L Adamczyk,JR Adams,I Aggarwal,MM Aggarwal,Z Ahammed,DM Anderson,EC Aschenauer,S Aslam,J Atchison,V Bairathi,W Baker,JG Ball Cap,K Barish,R Bellwied,P Bhagat,A Bhasin,S Bhatta,J Bielcik,J Bielcikova,JD Brandenburg,J Butterworth,XZ Cai,H Caines,M Calderón de la Barca Sánchez,D Cebra,J Ceska,I Chakaberia,P Chaloupka,BK Chan,Z Chang,A Chatterjee,D Chen,J Chen,JH Chen,Z Chen,J Cheng,Y Cheng,S Choudhury,W Christie,X Chu,HJ Crawford,M Csanád,G Dale-Gau,A Das,M Daugherity,IM Deppner,A Dhamija,L Di Carlo,L Didenko,P Dixit,X Dong,JL Drachenberg,E Duckworth,JC Dunlop,J Engelage,G Eppley,S Esumi,O Evdokimov,A Ewigleben,O Eyser,R Fatemi,S Fazio,CJ Feng,Y Feng,E Finch,Y Fisyak,FA Flor,C Fu,CA Gagliardi,T Galatyuk,F Geurts,N Ghimire,A Gibson,K Gopal,X Gou,D Grosnick,Y Guo,A Gupta,W Guryn,A Hamed,Y Han,S Harabasz,MD Harasty,JW Harris,H Harrison-Smith,W He,XH He,Y He,N Herrmann,L Holub,C Hu,Q Hu,Y Hu,B Huang,H Huang,HZ Huang,SL Huang,T Huang,X Huang,Y Huang,P Huck,TJ Humanic,D Isenhower,M Isshiki,WW Jacobs,A Jalotra,C Jena,A Jentsch,Y Ji,J Jia,C Jin,X Ju,EG Judd,S Kabana,ML Kabir,S Kagamaster,D Kalinkin,K Kang,D Kapukchyan,K Kauder,HW Ke,D Keane,M Kelsey,YV Khyzhniak,DP Kikoła,B Kimelman,D Kincses,I Kisel,A Kiselev,AG Knospe,HS Ko,LK Kosarzewski,L Kramarik,L Kumar,S Kumar,R Kunnawalkam Elayavalli,R Lacey,JM Landgraf,J Lauret,A Lebedev,JH Lee,YH Leung,N Lewis,C Li,W Li,X Li,Y Li

Journal

Physical Review C

Published Date

2023/6/1

We report systematic measurements of dielectron (e+ e−) invariant-mass M e e spectra at midrapidity in Au+ Au collisions at s N N= 27, 39, and 62.4 GeV taken with the STAR detector at the Relativistic Heavy Ion Collider. For all energies studied, a significant excess yield of dielectrons is observed in the low-mass region (0.40< M e e< 0.75 MeV/c 2) compared to hadronic cocktail simulations at freeze-out. Models that include an in-medium broadening of the ρ-meson spectral function consistently describe the observed excess. In addition, we report acceptance-corrected dielectron-excess spectra for Au+ Au collisions at midrapidity (| y e e|< 1) in the 0–80% centrality bin for each collision energy. The integrated excess yields for 0.4< M e e< 0.75 GeV/c 2, normalized by the charged particle multiplicity at midrapidity, are compared with previously published measurements for Au+ Au at s N N 1= 19.6 and 200 GeV …

Beam energy dependence of the linear and mode-coupled flow harmonics in Au+ Au collisions

Authors

BE Aboona,Jaroslav Adam,JR Adams,Geydar Agakishiev,Ishu Aggarwal,MM Aggarwal,Zubayer Ahammed,Alisher Aitbaev,Igor Alekseev,DM Anderson,A Aparin,J Atchison,GS Averichev,V Bairathi,W Baker,JG Ball Cap,K Barish,P Bhagat,A Bhasin,S Bhatta,IG Bordyuzhin,JD Brandenburg,AV Brandin,XZ Cai,H Caines,M Calderón de la Barca Sánchez,D Cebra,J Ceska,I Chakaberia,BK Chan,Z Chang,D Chen,J Chen,JH Chen,Z Chen,J Cheng,Y Cheng,S Choudhury,W Christie,X Chu,HJ Crawford,M Csanád,G Dale-Gau,A Das,M Daugherity,TG Dedovich,IM Deppner,AA Derevschikov,A Dhamija,L Di Carlo,L Didenko,P Dixit,X Dong,JL Drachenberg,E Duckworth,JC Dunlop,J Engelage,G Eppley,S Esumi,O Evdokimov,A Ewigleben,O Eyser,R Fatemi,S Fazio,CJ Feng,Y Feng,E Finch,Y Fisyak,FA Flor,C Fu,F Geurts,N Ghimire,A Gibson,K Gopal,X Gou,D Grosnick,A Gupta,A Hamed,Y Han,MD Harasty,JW Harris,H Harrison,W He,XH He,Y He,C Hu,Q Hu,Y Hu,H Huang,HZ Huang,SL Huang,T Huang,X Huang,Y Huang,TJ Humanic,D Isenhower,M Isshiki,WW Jacobs,A Jalotra,C Jena,Y Ji,J Jia,C Jin,X Ju,EG Judd,S Kabana,ML Kabir,D Kalinkin,K Kang,D Kapukchyan,K Kauder,HW Ke,D Keane,A Kechechyan,M Kelsey,B Kimelman,D Kincses,A Kiselev,AG Knospe,HS Ko,L Kochenda,AA Korobitsin,P Kravtsov,L Kumar,S Kumar,R Kunnawalkam Elayavalli,R Lacey,JM Landgraf,A Lebedev,R Lednicky,JH Lee,YH Leung,N Lewis,C Li,W Li,X Li,Y Li,Z Li,X Liang,Y Liang,T Lin,C Liu,F Liu,H Liu,L Liu,T Liu,X Liu,Y Liu,Z Liu,T Ljubicic

Journal

Physics Letters B

Published Date

2023/4/10

The linear and mode-coupled contributions to higher-order anisotropic flow are presented for Au+ Au collisions at s N N= 27, 39, 54.4, and 200 GeV and compared to similar measurements for Pb+ Pb collisions at the Large Hadron Collider (LHC). The coefficients and the flow harmonics' correlations, which characterize the linear and mode-coupled response to the lower-order anisotropies, indicate a beam energy dependence consistent with an influence from the specific shear viscosity (η/s). In contrast, the dimensionless coefficients, mode-coupled response coefficients, and normalized symmetric cumulants are approximately beam-energy independent, consistent with a significant role from initial-state effects. These measurements could provide unique supplemental constraints to (i) distinguish between different initial-state models and (ii) delineate the temperature (T) and baryon chemical potential (μ B …

Search for the chiral magnetic wave using anisotropic flow of identified particles at energies available at the BNL Relativistic Heavy Ion Collider

Authors

Journal

Physical Review C

Published Date

2023/7/14

The chiral magnetic wave (CMW) has been theorized to propagate in the deconfined nuclear medium formed in high-energy heavy-ion collisions and to cause a difference in elliptic flow (v 2) between negatively and positively charged hadrons. Experimental data consistent with the CMW have been reported by the STAR Collaboration at the Relativistic Heavy Ion Collider (RHIC), based on the charge asymmetry dependence of the pion v 2 from Au+ Au collisions at s N N= 27 to 200 GeV. In this comprehensive study, we present the STAR measurements of elliptic flow and triangular flow of charged pions, along with the v 2 of charged kaons and protons, as a function of charge asymmetry in Au+ Au collisions at s N N= 27, 39, 62.4, and 200 GeV. The slope parameters extracted from the linear dependence of the v 2 difference on charge asymmetry for different particle species are reported and compared in different …

Tomography of ultrarelativistic nuclei with polarized photon-gluon collisions

Authors

STAR collaboration

Journal

Science Advances

Published Date

2023/1/4

A linearly polarized photon can be quantized from the Lorentz-boosted electromagnetic field of a nucleus traveling at ultrarelativistic speed. When two relativistic heavy nuclei pass one another at a distance of a few nuclear radii, the photon from one nucleus may interact through a virtual quark-antiquark pair with gluons from the other nucleus, forming a short-lived vector meson (e.g., ρ0). In this experiment, the polarization was used in diffractive photoproduction to observe a unique spin interference pattern in the angular distribution of ρ0 → π+π− decays. The observed interference is a result of an overlap of two wave functions at a distance an order of magnitude larger than the ρ0 travel distance within its lifetime. The strong-interaction nuclear radii were extracted from these diffractive interactions and found to be 6.53 ± 0.06 fm (197Au) and 7.29 ± 0.08 fm (238U), larger than the nuclear charge radii. The observable …

Energy dependence of intermittency for charged hadrons in Au+ Au collisions at RHIC

Authors

MI Abdulhamid,BE Aboona,Jaroslav Adam,Leszek Adamczyk,JR Adams,Ishu Aggarwal,MM Aggarwal,Zubayer Ahammed,DM Anderson,Elke-Caroline Aschenauer,S Aslam,J Atchison,V Bairathi,W Baker,JG Ball Cap,K Barish,R Bellwied,P Bhagat,A Bhasin,S Bhatta,J Bielcik,J Bielcikova,JD Brandenburg,XZ Cai,H Caines,M Calderón de la Barca Sánchez,D Cebra,J Ceska,I Chakaberia,P Chaloupka,BK Chan,Z Chang,A Chatterjee,D Chen,J Chen,JH Chen,Z Chen,J Cheng,Y Cheng,S Choudhury,W Christie,X Chu,HJ Crawford,M Csanád,G Dale-Gau,A Das,M Daugherity,IM Deppner,A Dhamija,L Di Carlo,P Dixit,X Dong,JL Drachenberg,E Duckworth,JC Dunlop,J Engelage,G Eppley,S Esumi,O Evdokimov,A Ewigleben,O Eyser,R Fatemi,S Fazio,CJ Feng,Y Feng,E Finch,Y Fisyak,FA Flor,C Fu,CA Gagliardi,T Galatyuk,T Gao,F Geurts,N Ghimire,A Gibson,K Gopal,X Gou,D Grosnick,A Gupta,W Guryn,A Hamed,Y Han,S Harabasz,MD Harasty,JW Harris,H Harrison-Smith,W He,XH He,Y He,N Herrmann,L Holub,C Hu,Q Hu,Y Hu,H Huang,HZ Huang,SL Huang,T Huang,X Huang,Y Huang,TJ Humanic,D Isenhower,M Isshiki,WW Jacobs,A Jalotra,C Jena,A Jentsch,Y Ji,J Jia,C Jin,X Ju,EG Judd,S Kabana,ML Kabir,S Kagamaster,D Kalinkin,K Kang,D Kapukchyan,K Kauder,D Keane,M Kelsey,YV Khyzhniak,DP Kikoła,B Kimelman,D Kincses,I Kisel,A Kiselev,AG Knospe,HS Ko,LK Kosarzewski,L Kramarik,L Kumar,S Kumar,R Kunnawalkam Elayavalli,R Lacey,JM Landgraf,J Lauret,A Lebedev,JH Lee,YH Leung,N Lewis,C Li,W Li,X Li,Y Li,Z Li,X Liang,Y Liang,R Licenik,T Lin

Journal

Physics Letters B

Published Date

2023/10/10

Density fluctuations near the QCD critical point can be probed via an intermittency analysis in relativistic heavy-ion collisions. We report the first measurement of intermittency in Au+ Au collisions at s NN= 7.7-200 GeV measured by the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). The scaled factorial moments of identified charged hadrons are analyzed at mid-rapidity and within the transverse momentum phase space. We observe a power-law behavior of scaled factorial moments in Au+ Au collisions and a decrease in the extracted scaling exponent (ν) from peripheral to central collisions. The ν is consistent with a constant for different collisions energies in the mid-central (10-40%) collisions. Moreover, the ν in the 0-5% most central Au+ Au collisions exhibits a non-monotonic energy dependence that reaches a minimum around s NN= 27 GeV. The physics implications on the QCD phase structure …

Azimuthal anisotropy measurement of (multi)strange hadrons in Au+Au collisions at GeV

Authors

MS Abdallah,BE Aboona,Jaroslav Adam,Leszek Adamczyk,JR Adams,JK Adkins,Ishu Aggarwal,MM Aggarwal,Zubayer Ahammed,DM Anderson,EC Aschenauer,J Atchison,V Bairathi,W Baker,JG Ball Cap,K Barish,R Bellwied,P Bhagat,A Bhasin,S Bhatta,J Bielcik,J Bielcikova,JD Brandenburg,XZ Cai,H Caines,M Calderón de la Barca Sánchez,D Cebra,I Chakaberia,P Chaloupka,BK Chan,Z Chang,A Chatterjee,S Chattopadhyay,D Chen,J Chen,JH Chen,X Chen,Z Chen,J Cheng,S Choudhury,W Christie,X Chu,HJ Crawford,M Csanád,M Daugherity,IM Deppner,A Dhamija,L Di Carlo,L Didenko,P Dixit,X Dong,JL Drachenberg,E Duckworth,JC Dunlop,J Engelage,G Eppley,S Esumi,O Evdokimov,A Ewigleben,O Eyser,R Fatemi,FM Fawzi,S Fazio,CJ Feng,Y Feng,E Finch,Y Fisyak,A Francisco,C Fu,CA Gagliardi,T Galatyuk,F Geurts,N Ghimire,A Gibson,K Gopal,X Gou,D Grosnick,A Gupta,W Guryn,A Hamed,Y Han,S Harabasz,MD Harasty,JW Harris,H Harrison,S He,W He,XH He,Y He,S Heppelmann,N Herrmann,E Hoffman,L Holub,C Hu,Q Hu,Y Hu,H Huang,HZ Huang,SL Huang,T Huang,X Huang,Y Huang,TJ Humanic,D Isenhower,M Isshiki,WW Jacobs,C Jena,A Jentsch,Y Ji,J Jia,K Jiang,C Jin,X Ju,EG Judd,S Kabana,ML Kabir,S Kagamaster,D Kalinkin,K Kang,D Kapukchyan,K Kauder,HW Ke,D Keane,M Kelsey,YV Khyzhniak,DP Kikoła,B Kimelman,D Kincses,I Kisel,A Kiselev,AG Knospe,HS Ko,LK Kosarzewski,L Kramarik,L Kumar,S Kumar,R Kunnawalkam Elayavalli,JH Kwasizur,R Lacey,S Lan,JM Landgraf,J Lauret,A Lebedev,JH Lee,YH Leung,N Lewis,C Li,W Li,X Li,Y Li

Journal

Physical Review C

Published Date

2023/2/22

Azimuthal anisotropy of produced particles is one of the most important observables used to access the collective properties of the expanding medium created in relativistic heavy-ion collisions. In this paper, we present second (v 2) and third (v 3) order azimuthal anisotropies of K S 0, ϕ, Λ, Ξ, and Ω at midrapidity (| y|< 1) in Au+ Au collisions at s N N= 54.4 GeV measured by the STAR detector. The v 2 and v 3 are measured as a function of transverse momentum and centrality. Their energy dependence is also studied. v 3 is found to be more sensitive to the change in the center-of-mass energy than v 2. Scaling by constituent quark number is found to hold for v 2 within 10%. This observation could be evidence for the development of partonic collectivity in 54.4 GeV Au+ Au collisions. Differences in v 2 and v 3 between baryons and antibaryons are presented, and ratios of v 3/v 2 3/2 are studied and motivated by …

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The research interests of Xiaofeng Luo are: Nuclear Physics, Particle Physics, QCD Phase Diagram, QCD Critical Point

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