Sebastian Jäger

University of Sussex

H-index: 41

Europe-United Kingdom

About Sebastian Jäger

Sebastian Jäger, With an exceptional h-index of 41 and a recent h-index of 33 (since 2020), a distinguished researcher at University of Sussex, specializes in the field of Theoretical Particle Physics.

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

Search for a muonphilic scalar or vector via decays at BESIII

Study of the doubly Cabibbo-suppressed decays and

Observation of Significant Flavor-SU(3) Breaking in the Kaon Wave Function at and Discovery of the Charmless Decay

Measurement of the cross sections at from 2.3094 to 3.0800 GeV

Search for di-photon decays of an axion-like particle in radiative decays of J/psi

Observation of the Anomalous Shape of X (1840) in J/ψ→ γ3 (π^{+} π^{-}) Indicating a Second Resonance Near pp [over¯] Threshold

Observation of two structures in the processes and

Updated measurements of the M1 transition with

Sebastian Jäger Information

University	University of Sussex
Position	Reader Department of Physics & Astronomy
Citations(all)	9194
Citations(since 2020)	5052
Cited By	5186
hIndex(all)	41
hIndex(since 2020)	33
i10Index(all)	116
i10Index(since 2020)	104
Email	Access Email
University Profile Page	University of Sussex

Sebastian Jäger Skills & Research Interests

Theoretical Particle Physics

Top articles of Sebastian Jäger

Search for a muonphilic scalar or vector via decays at BESIII

Authors

M Ablikim,MN Achasov,P Adlarson,O Afedulidis,XC Ai,R Aliberti,A Amoroso,MR An,Q An,Y Bai,O Bakina,I Balossino,Y Ban,H-R Bao,V Batozskaya,K Begzsuren,N Berger,M Berlowski,M Bertani,D Bettoni,F Bianchi,E Bianco,A Bortone,I Boyko,RA Briere,A Brueggemann,H Cai,X Cai,A Calcaterra,GF Cao,N Cao,SA Cetin,JF Chang,WL Chang,GR Che,C Chen,Chao Chen,G Chen,HS Chen,ML Chen,SJ Chen,SL Chen,SM Chen,T Chen,XR Chen,XT Chen,YB Chen,YQ Chen,ZJ Chen,SK Choi,X Chu,G Cibinetto,SC Coen,F Cossio,JJ Cui,HL Dai,JP Dai,A Dbeyssi,RE de Boer,D Dedovich,ZY Deng,A Denig,I Denysenko,M Destefanis,F De Mori,B Ding,XX Ding,Y Ding,J Dong,LY Dong,MY Dong,X Dong,MC Du,SX Du,ZH Duan,P Egorov,YH Fan,J Fang,SS Fang,WX Fang,Y Fang,YQ Fang,R Farinelli,L Fava,F Feldbauer,G Felici,CQ Feng,JH Feng,YT Feng,K Fischer,M Fritsch,CD Fu,JL Fu,YW Fu,H Gao,YN Gao,Yang Gao,S Garbolino,I Garzia,PT Ge,ZW Ge,C Geng,EM Gersabeck,A Gilman,K Goetzen,L Gong,WX Gong,W Gradl,S Gramigna,M Greco,MH Gu,YT Gu,CY Guan,ZL Guan,AQ Guo,LB Guo,MJ Guo,RP Guo,YP Guo,A Guskov,J Gutierrez,KL Han,TT Han,WY Han,XQ Hao,FA Harris,KK He,KL He,FH Heinsius,CH Heinz,YK Heng,C Herold,T Holtmann,PC Hong,GY Hou,XT Hou,YR Hou,ZL Hou,BY Hu,HM Hu,JF Hu,T Hu,Y Hu,GS Huang,KX Huang,LQ Huang,XT Huang,YP Huang,T Hussain,F Hölzken

Journal

Physical Review D

Published Date

2024/2/14

A light scalar X 0 or vector X 1 particles have been introduced as a possible explanation for the (g− 2) μ anomaly and dark matter phenomena. Using (8.998±0.039)× 10 9 J/ψ events collected by the BESIII detector, we search for a light muon philic scalar X 0 or vector X 1 in the processes J/ψ→ μ+ μ− X 0, 1 with X 0, 1 invisible decays. No obvious signal is found, and the upper limits on the coupling g 0, 1′ between the muon and the X 0, 1 particles are set to be between 1.1× 10− 3 and 1.0× 10− 2 for the X 0, 1 mass in the range of 1< M (X 0, 1)< 1000 MeV/c 2 at 90% credibility level.

Study of the doubly Cabibbo-suppressed decays and

Authors

M Ablikim,MN Achasov,P Adlarson,XC Ai,R Aliberti,A Amoroso,MR An,Q An,Y Bai,O Bakina,I Balossino,Y Ban,H-R Bao,V Batozskaya,K Begzsuren,N Berger,M Berlowski,M Bertani,D Bettoni,F Bianchi,E Bianco,A Bortone,I Boyko,RA Briere,A Brueggemann,H Cai,X Cai,A Calcaterra,GF Cao,N Cao,SA Cetin,JF Chang,TT Chang,WL Chang,GR Che,Chao Chen,Chao Chen,G Chen,HS Chen,ML Chen,SJ Chen,SL Chen,SM Chen,T Chen,XR Chen,XT Chen,YB Chen,YQ Chen,ZJ Chen,SK Choi,X Chu,G Cibinetto,SC Coen,F Cossio,JJ Cui,HL Dai,JP Dai,A Dbeyssi,RE de Boer,D Dedovich,ZY Deng,A Denig,I Denysenko,M Destefanis,F De Mori,B Ding,XX Ding,Y Ding,J Dong,LY Dong,MY Dong,X Dong,MC Du,SX Du,ZH Duan,P Egorov,YH Fan,J Fang,SS Fang,WX Fang,Y Fang,YQ Fang,R Farinelli,L Fava,F Feldbauer,G Felici,CQ Feng,JH Feng,YT Feng,K Fischer,M Fritsch,CD Fu,JL Fu,YW Fu,H Gao,YN Gao,Yang Gao,S Garbolino,I Garzia,PT Ge,ZW Ge,C Geng,EM Gersabeck,A Gilman,K Goetzen,L Gong,WX Gong,W Gradl,S Gramigna,M Greco,MH Gu,YT Gu,CY Guan,ZL Guan,AQ Guo,LB Guo,MJ Guo,RP Guo,YP Guo,A Guskov,J Gutierrez,TT Han,WY Han,XQ Hao,FA Harris,KK He,KL He,FHH Heinsius,CH Heinz,YK Heng,C Herold,T Holtmann,PC Hong,GY Hou,XT Hou,YR Hou,ZL Hou,BY Hu,HM Hu,JF Hu,T Hu,Y Hu,GS Huang,KX Huang,LQ Huang,XT Huang,YP Huang,T Hussain,N Hüsken,M Irshad

Journal

Physical Review D

Published Date

2024/2/27

Based on 7.33 fb− 1 of e+ e− collision data collected at center-of-mass energies between 4.128 and 4.226 GeV with the BESIII detector, the experimental studies of the doubly Cabibbo-suppressed decays D s+→ K+ K+ π− and D s+→ K+ K+ π− π 0 are reported. We determine the absolute branching fraction of D s+→ K+ K+ π− to be (1.2 4− 0.26+ 0.28 (stat)±0.06 (syst))× 10− 4. No significant signal of D s+→ K+ K+ π− π 0 is observed and the upper limit on its decay branching fraction at 90% confidence level is set to be 1.7× 10− 4.

Observation of Significant Flavor-SU(3) Breaking in the Kaon Wave Function at and Discovery of the Charmless Decay

Authors

M Ablikim,MN Achasov,P Adlarson,XC Ai,R Aliberti,A Amoroso,MR An,Q An,Y Bai,O Bakina,I Balossino,Y Ban,H-R Bao,V Batozskaya,K Begzsuren,N Berger,M Berlowski,M Bertani,D Bettoni,F Bianchi,E Bianco,A Bortone,I Boyko,RA Briere,A Brueggemann,H Cai,X Cai,A Calcaterra,GF Cao,N Cao,SA Cetin,JF Chang,TT Chang,WL Chang,GR Che,C Chen,Chao Chen,G Chen,HS Chen,ML Chen,SJ Chen,SL Chen,SM Chen,T Chen,XR Chen,XT Chen,YB Chen,YQ Chen,ZJ Chen,SK Choi,X Chu,G Cibinetto,SC Coen,F Cossio,JJ Cui,HL Dai,JP Dai,A Dbeyssi,RE de Boer,D Dedovich,ZY Deng,A Denig,I Denysenko,M Destefanis,F De Mori,B Ding,XX Ding,Y Ding,J Dong,LY Dong,MY Dong,X Dong,MC Du,SX Du,ZH Duan,P Egorov,YH Fan,J Fang,SS Fang,WX Fang,Y Fang,YQ Fang,R Farinelli,L Fava,F Feldbauer,G Felici,CQ Feng,JH Feng,K Fischer,M Fritsch,CD Fu,JL Fu,YW Fu,H Gao,YN Gao,Yang Gao,S Garbolino,I Garzia,PT Ge,ZW Ge,C Geng,EM Gersabeck,A Gilman,K Goetzen,L Gong,WX Gong,W Gradl,S Gramigna,M Greco,MH Gu,YT Gu,CY Guan,ZL Guan,AQ Guo,LB Guo,MJ Guo,RP Guo,YP Guo,A Guskov,J Gutierrez,TT Han,WY Han,XQ Hao,FA Harris,KK He,KL He,FHH Heinsius,CH Heinz,YK Heng,C Herold,T Holtmann,PC Hong,GY Hou,XT Hou,YR Hou,ZL Hou,BY Hu,HM Hu,JF Hu,T Hu,Y Hu,GS Huang,KX Huang,LQ Huang,XT Huang,YP Huang,T Hussain,N Hüsken,M Irshad,J Jackson

Journal

arXiv preprint arXiv:2312.10962

Published Date

2023/12/18

We present cross sections for the reaction at center-of-mass energies ranging from 3.51 GeV to 4.95 GeV using data samples collected in the BESIII experiment, corresponding to a total integrated luminosity of 26.5 fb. The ratio of neutral-to-charged kaon form factors at large momentum transfers () is determined to be , which indicates a small but significant effect of flavor-SU(3) breaking in the kaon wave function, and consequently excludes the possibility that flavor-SU(3) breaking is the primary reason for the strong experimental violation of the pQCD prediction , where and are the form factors, and and are the decay constants of charged pions and kaons, respectively. We also observe a significant signal for the charmless decay for the first time. Within a contour of the likelihood value, the the branching fraction for is determined to be , and the relative phase between the continuum and amplitudes is . The branching fraction is in good agreement with the - and -wave charmonia mixing scheme proposed in the interpretation of the " puzzle" between and decays.

Measurement of the cross sections at from 2.3094 to 3.0800 GeV

Authors

M Ablikim,MN Achasov,P Adlarson,XC Ai,R Aliberti,A Amoroso,MR An,Q An,Y Bai,O Bakina,I Balossino,Y Ban,V Batozskaya,K Begzsuren,N Berger,M Berlowski,M Bertani,D Bettoni,F Bianchi,E Bianco,J Bloms,A Bortone,I Boyko,RA Briere,A Brueggemann,H Cai,X Cai,A Calcaterra,GF Cao,N Cao,SA Cetin,JF Chang,TT Chang,WL Chang,GR Che,C Chen,Chao Chen,G Chen,HS Chen,ML Chen,SJ Chen,SM Chen,T Chen,XR Chen,XT Chen,YB Chen,YQ Chen,ZJ Chen,WS Cheng,SK Choi,X Chu,G Cibinetto,SC Coen,F Cossio,JJ Cui,HL Dai,JP Dai,A Dbeyssi,RE de Boer,D Dedovich,ZY Deng,A Denig,I Denysenko,M Destefanis,F De Mori,B Ding,XX Ding,Y Ding,J Dong,LY Dong,MY Dong,X Dong,SX Du,ZH Duan,P Egorov,YL Fan,J Fang,SS Fang,WX Fang,Y Fang,R Farinelli,L Fava,F Feldbauer,G Felici,CQ Feng,JH Feng,K Fischer,M Fritsch,C Fritzsch,CD Fu,JL Fu,YW Fu,H Gao,YN Gao,Yang Gao,S Garbolino,I Garzia,PT Ge,ZW Ge,C Geng,EM Gersabeck,A Gilman,K Goetzen,L Gong,WX Gong,W Gradl,S Gramigna,M Greco,MH Gu,YT Gu,CY Guan,ZL Guan,AQ Guo,LB Guo,MJ Guo,RP Guo,YP Guo,A Guskov,XT Hou,TT Han,WY Han,XQ Hao,FA Harris,KK He,KL He,FHH Heinsius,CH Heinz,YK Heng,C Herold,T Holtmann,PC Hong,GY Hou,YR Hou,ZL Hou,HM Hu,JF Hu,T Hu,Y Hu,GS Huang,KX Huang,LQ Huang,XT Huang,YP Huang,T Hussain,N Hüsken,W Imoehl,M Irshad,J Jackson,S Jaeger,S Janchiv

Journal

Physical Review D

Published Date

2024/1/4

The Born cross sections and effective form factors of the process e+ e−→ Λ Σ 0+ c. c. are measured at 14 center-of-mass energy points from 2.3094 to 3.0800 GeV, based on data corresponding to an integrated luminosity of (478.5±4.8) pb− 1 collected with the BESIII detector. A nonzero Born cross section is observed at the center-of-mass energy of 2.3094 GeV with a statistical significance of more than five standard deviations, and the cross sections at other energies are obtained with improved precision compared to earlier measurements from the BABAR Collaboration. The Born cross-section line shape is described better by a shape considering the strong-interaction effects than by a pQCD motivated functional form.

Search for di-photon decays of an axion-like particle in radiative decays of J/psi

Authors

M Ablikim,MN Achasov,P Adlarson,O Afedulidis,XC Ai,R Aliberti,A Amoroso,MR An,Q An,Y Bai,O Bakina,I Balossino,Y Ban,H-R Bao,V Batozskaya,K Begzsuren,N Berger,M Berlowski,M Bertani,D Bettoni,F Bianchi,E Bianco,A Bortone,I Boyko,RA Briere,A Brueggemann,H Cai,X Cai,A Calcaterra,GF Cao,N Cao,SA Cetin,JF Chang,GR Che,C Chen,Chao Chen,G Chen,HS Chen,ML Chen,SJ Chen,SL Chen,SM Chen,T Chen,XR Chen,XT Chen,YB Chen,YQ Chen,ZJ Chen,ZY Chen,SK Choi,G Cibinetto,SC Coen,F Cossio,JJ Cui,HL Dai,JP Dai,A Dbeyssi,RE de Boer,D Dedovich,ZY Deng,A Denig,I Denysenko,M Destefanis,F De Mori,B Ding,XX Ding,Y Ding,J Dong,LY Dong,MY Dong,X Dong,MC Du,SX Du,ZH Duan,P Egorov,YH Fan,J Fang,SS Fang,WX Fang,Y Fang,YQ Fang,R Farinelli,L Fava,F Feldbauer,G Felici,CQ Feng,JH Feng,YT Feng,K Fischer,M Fritsch,CD Fu,JL Fu,YW Fu,H Gao,YN Gao,Yang Gao,S Garbolino,I Garzia,L Ge,PT Ge,ZW Ge,C Geng,EM Gersabeck,A Gilman,K Goetzen,L Gong,WX Gong,W Gradl,S Gramigna,M Greco,MH Gu,YT Gu,CY Guan,AQ Guo,LB Guo,MJ Guo,RP Guo,YP Guo,A Guskov,J Gutierrez,KL Han,TT Han,WY Han,XQ Hao,FA Harris,KK He,KL He,FH Heinsius,CH Heinz,YK Heng,C Herold,T Holtmann,PC Hong,GY Hou,XT Hou,YR Hou,ZL Hou,BY Hu,HM Hu,JF Hu,T Hu,Y Hu,GS Huang,KX Huang,LQ Huang,XT Huang,YP Huang,T Hussain,F Hölzken,N Hüsken

Journal

arXiv preprint arXiv:2404.04640

Published Date

2024/4/6

We search for the di-photon decay of a light pseudoscalar axion-like particle, , in radiative decays of the , using 10 billion events collected with the BESIII detector. We find no evidence of a narrow resonance and set upper limits at the confidence level on the product branching fraction and the axion-like particle photon coupling constant in the ranges of and GeV, respectively, for GeV/. These are the most stringent limits to date in this mass region.

Observation of the Anomalous Shape of X (1840) in J/ψ→ γ3 (π^{+} π^{-}) Indicating a Second Resonance Near pp [over¯] Threshold

Authors

M Ablikim,MN Achasov,P Adlarson,XC Ai,R Aliberti,A Amoroso,MR An,Q An,Y Bai,O Bakina,I Balossino,Y Ban,V Batozskaya,K Begzsuren,N Berger,M Berlowski,M Bertani,D Bettoni,F Bianchi,E Bianco,A Bortone,I Boyko,RA Briere,A Brueggemann,H Cai,X Cai,A Calcaterra,GF Cao,N Cao,SA Cetin,JF Chang,TT Chang,WL Chang,GR Che,C Chen,Chao Chen,G Chen,HS Chen,ML Chen,SJ Chen,SL Chen,SM Chen,T Chen,XR Chen,XT Chen,YB Chen,YQ Chen,ZJ Chen,WS Cheng,SK Choi,X Chu,G Cibinetto,SC Coen,F Cossio,JJ Cui,HL Dai,JP Dai,A Dbeyssi,RE de Boer,D Dedovich,ZY Deng,A Denig,I Denysenko,M Destefanis,F De Mori,B Ding,XX Ding,Y Ding,J Dong,LY Dong,MY Dong,X Dong,MC Du,SX Du,ZH Duan,P Egorov,YH Fan,YL Fan,J Fang,SS Fang,WX Fang,Y Fang,R Farinelli,L Fava,F Feldbauer,G Felici,CQ Feng,JH Feng,K Fischer,M Fritsch,C Fritzsch,CD Fu,JL Fu,YW Fu,H Gao,YN Gao,Yang Gao,S Garbolino,I Garzia,PT Ge,ZW Ge,C Geng,EM Gersabeck,A Gilman,K Goetzen,L Gong,WX Gong,W Gradl,S Gramigna,M Greco,MH Gu,YT Gu,CY Guan,ZL Guan,AQ Guo,LB Guo,MJ Guo,RP Guo,YP Guo,A Guskov,TT Han,WY Han,XQ Hao,FA Harris,KK He,KL He,FHH Heinsius,CH Heinz,YK Heng,C Herold,T Holtmann,PC Hong,GY Hou,XT Hou,YR Hou,ZL Hou,HM Hu,JF Hu,T Hu,Y Hu,GS Huang,KX Huang,LQ Huang,XT Huang,YP Huang,T Hussain,N Hüsken,W Imoehl,N In der Wiesche,J Jackson

Journal

Physical review letters

Published Date

2024/4/12

Using a sample of (10087±44)×10^{6} J/ψ events, which is about 45 times larger than that was previously analyzed, a further investigation on the J/ψ→γ3(π^{+}π^{-}) decay is performed. A significant distortion at 1.84 GeV/c^{2} in the line shape of the 3(π^{+}π^{-}) invariant mass spectrum is observed for the first time, which could be resolved by two overlapping resonant structures, X(1840) and X(1880). The new state X(1880) is observed with a statistical significance larger than 10σ. The mass and width of X(1880) are determined to be 1882.1±1.7±0.7 MeV/c^{2} and 30.7±5.5±2.4 MeV, respectively, which indicates the existence of a pp[over ¯] bound state.

Observation of two structures in the processes and

Authors

Medina Ablikim,Mikhail N Achasov,P Adlarson,XC Ai,Riccardo Aliberti,Antonio Amoroso,MR An,Qi An,Yu Bai,Olga Bakina,I Balossino,Y Ban,H-R Bao,V Batozskaya,K Begzsuren,N Berger,M Berlowski,M Bertani,D Bettoni,F Bianchi,E Bianco,A Bortone,I Boyko,RA Briere,A Brueggemann,H Cai,X Cai,A Calcaterra,GF Cao,N Cao,SA Cetin,JF Chang,TT Chang,WL Chang,GR Che,C Chen,Chao Chen,G Chen,HS Chen,ML Chen,SJ Chen,SL Chen,SM Chen,T Chen,XR Chen,XT Chen,YB Chen,YQ Chen,ZJ Chen,WS Cheng,SK Choi,X Chu,G Cibinetto,SC Coen,F Cossio,JJ Cui,HL Dai,JP Dai,A Dbeyssi,RE de Boer,D Dedovich,ZY Deng,A Denig,I Denysenko,M Destefanis,F De Mori,B Ding,XX Ding,Y Ding,J Dong,LY Dong,MY Dong,X Dong,MC Du,SX Du,ZH Duan,P Egorov,YH Fan,J Fang,SS Fang,WX Fang,Y Fang,R Farinelli,L Fava,F Feldbauer,G Felici,CQ Feng,JH Feng,K Fischer,M Fritsch,CD Fu,JL Fu,YW Fu,H Gao,YN Gao,Yang Gao,S Garbolino,I Garzia,PT Ge,ZW Ge,C Geng,EM Gersabeck,A Gilman,K Goetzen,L Gong,WX Gong,W Gradl,S Gramigna,M Greco,MH Gu,YT Gu,CY Guan,ZL Guan,AQ Guo,LB Guo,MJ Guo,RP Guo,YP Guo,A Guskov,TT Han,WY Han,XQ Hao,FA Harris,KK He,KL He,FHH Heinsius,CH Heinz,YK Heng,C Herold,T Holtmann,PC Hong,GY Hou,XT Hou,YR Hou,ZL Hou,HM Hu,JF Hu,T Hu,Y Hu,GS Huang,KX Huang,LQ Huang,XT Huang,YP Huang,T Hussain,N Hüsken,M Irshad,J Jackson,S Jaeger,S Janchiv

Journal

arXiv preprint arXiv:2401.14720

Published Date

2024/1/26

We present measurements of the Born cross sections for the processes and at center-of-mass energies from 4.308 to 4.951 GeV. The measurements are performed with data samples corresponding to an integrated luminosity of 11.0 collected with the BESIII detector operating at the BEPCII storage ring. Assuming the signals come from a single resonance, the mass and width are determined to be MeV/ and MeV, respectively, which is consistent with the parameters of the well-established resonance . In addition, we also use one single resonance to describe the line shape, and determine the mass and width to be MeV/ and MeV, respectively. The structure of this line shape requires further understanding.

Updated measurements of the M1 transition with

Authors

M Ablikim,MN Achasov,P Adlarson,XC Ai,R Aliberti,A Amoroso,MR An,Q An,Y Bai,O Bakina,I Balossino,Y Ban,V Batozskaya,K Begzsuren,N Berger,M Berlowski,M Bertani,D Bettoni,F Bianchi,E Bianco,A Bortone,I Boyko,RA Briere,A Brueggemann,H Cai,X Cai,A Calcaterra,GF Cao,N Cao,SA Cetin,JF Chang,TT Chang,WL Chang,GR Che,C Chen,Chao Chen,G Chen,HS Chen,ML Chen,SJ Chen,SL Chen,SM Chen,T Chen,XR Chen,XT Chen,YB Chen,YQ Chen,ZJ Chen,WS Cheng,SK Choi,X Chu,G Cibinetto,SC Coen,F Cossio,JJ Cui,HL Dai,JP Dai,A Dbeyssi,RE de Boer,D Dedovich,ZY Deng,A Denig,I Denysenko,M Destefanis,F De Mori,B Ding,XX Ding,Y Ding,J Dong,LY Dong,MY Dong,X Dong,MC Du,SX Du,ZH Duan,P Egorov,YH Fan,J Fang,SS Fang,WX Fang,Y Fang,R Farinelli,L Fava,F Feldbauer,G Felici,CQ Feng,JH Feng,K Fischer,M Fritsch,CD Fu,JL Fu,YW Fu,H Gao,YN Gao,Yang Gao,S Garbolino,I Garzia,PT Ge,ZW Ge,C Geng,EM Gersabeck,A Gilman,K Goetzen,L Gong,WX Gong,W Gradl,S Gramigna,M Greco,MH Gu,YT Gu,CY Guan,ZL Guan,AQ Guo,LB Guo,MJ Guo,RP Guo,YP Guo,A Guskov,TT Han,WY Han,XQ Hao,FA Harris,KK He,KL He,FHH Heinsius,CH Heinz,YK Heng,C Herold,T Holtmann,PC Hong,GY Hou,XT Hou,YR Hou,ZL Hou,HM Hu,JF Hu,T Hu,Y Hu,GS Huang,KX Huang,LQ Huang,XT Huang,YP Huang,T Hussain,N Hüsken,M Irshad,J Jackson,S Jaeger,S Janchiv,JH Jeong

Journal

Physical Review D

Published Date

2024/2/9

Based on a data sample of (2712.4±14.3)× 10 6 ψ (3686) events collected with the BESIII detector at the BEPCII collider, the M1 transition ψ (3686)→ γ η c (2 S) with η c (2 S)→ K Kπ is studied, where K Kπ is K+ K− π 0 or K S 0 K±π∓. The mass and width of the η c (2 S) are measured to be (3637.8±0.8 (stat)±0.2 (syst)) MeV/c 2 and (10.5±1.7 (stat)±3.5 (syst)) MeV, respectively. The product branching fraction B (ψ (3686)→ γ η c (2 S))× B (η c (2 S)→ K Kπ) is determined to be (0.97±0.06 (stat)±0.09 (syst))× 10− 5. Using B (η c (2 S)→ K Kπ)=(1.8 6− 0.49+ 0.68)%, we obtain the branching fraction of the radiative transition to be B (ψ (3686)→ γ η c (2 S))=(5.2±0.3 (stat)±0.5 (syst)− 1.4+ 1.9 (extr))× 10− 4, where the third uncertainty is due to the quoted B (η c (2 S)→ K Kπ).

Determination of the Timelike Electromagnetic Form Factors

Authors

M Ablikim,MN Achasov,P Adlarson,XC Ai,R Aliberti,A Amoroso,MR An,Q An,Y Bai,O Bakina,I Balossino,Y Ban,V Batozskaya,K Begzsuren,N Berger,M Berlowski,M Bertani,D Bettoni,F Bianchi,E Bianco,A Bortone,I Boyko,RA Briere,A Brueggemann,H Cai,X Cai,A Calcaterra,GF Cao,N Cao,SA Cetin,JF Chang,TT Chang,WL Chang,GR Che,C Chen,Chao Chen,G Chen,HS Chen,ML Chen,SJ Chen,SM Chen,T Chen,XR Chen,XT Chen,YB Chen,YQ Chen,ZJ Chen,WS Cheng,SK Choi,X Chu,G Cibinetto,SC Coen,F Cossio,JJ Cui,HL Dai,JP Dai,A Dbeyssi,RE de Boer,D Dedovich,ZY Deng,A Denig,I Denysenko,M Destefanis,F De Mori,B Ding,XX Ding,Y Ding,J Dong,LY Dong,MY Dong,X Dong,MC Du,SX Du,ZH Duan,P Egorov,YHY Fan,YL Fan,J Fang,SS Fang,WX Fang,Y Fang,R Farinelli,L Fava,F Feldbauer,G Felici,CQ Feng,JH Feng,K Fischer,M Fritsch,C Fritzsch,CD Fu,JL Fu,YW Fu,H Gao,YN Gao,Yang Gao,S Garbolino,I Garzia,PT Ge,ZW Ge,C Geng,EM Gersabeck,A Gilman,K Goetzen,L Gong,WX Gong,W Gradl,S Gramigna,M Greco,MH Gu,YT Gu,CY Guan,ZL Guan,AQ Guo,LB Guo,MJ Guo,RP Guo,YP Guo,A Guskov,TT Han,WY Han,XQ Hao,FA Harris,KK He,KL He,FHH Heinsius,CH Heinz,YK Heng,C Herold,T Holtmann,PC Hong,GY Hou,XT Hou,YR Hou,ZL Hou,HM Hu,JF Hu,T Hu,Y Hu,GS Huang,KX Huang,LQ Huang,XT Huang,YP Huang,T Hussain,N Hüsken,W Imoehl,J Jackson,S Jaeger,S Janchiv

Journal

Physical Review Letters

Published Date

2024/2/22

Based on data samples collected with the BESIII detector at the BEPCII collider, the process e+ e−→ Σ+ Σ− is studied at center-of-mass energies s= 2.3960, 2.6454, and 2.9000 GeV. Using a fully differential angular description of the final state particles, both the relative magnitude and phase information of the Σ+ electromagnetic form factors in the timelike region are extracted. The relative phase between the electric and magnetic form factors is determined to be sin Δ Φ=− 0.67±0.29 (stat)±0.18 (syst) at s= 2.3960 GeV, Δ Φ= 55±19 (stat)±14 (syst) at s= 2.6454 GeV, and 78±22 (stat)±9 (syst) at s= 2.9000 GeV. For the first time, the phase of the hyperon electromagnetic form factors is explored in a wide range of four-momentum transfer. The evolution of the phase along with four-momentum transfer is an important input for understanding its asymptotic behavior and the dynamics of baryons.

Observation of decays to and

Authors

M Ablikim,MN Achasov,P Adlarson,S Ahmed,M Albrecht,R Aliberti,A Amoroso,MR An,Q An,XH Bai,Y Bai,O Bakina,R Baldini Ferroli,I Balossino,Y Ban,K Begzsuren,N Berger,M Bertani,D Bettoni,F Bianchi,J Bloms,A Bortone,I Boyko,RA Briere,H Cai,X Cai,A Calcaterra,GF Cao,N Cao,SA Cetin,JF Chang,WL Chang,DY Chen,G Chen,HS Chen,ML Chen,SJ Chen,XR Chen,YB Chen,ZJ Chen,WS Cheng,G Cibinetto,F Cossio,XF Cui,HL Dai,JP Dai,XC Dai,A Dbeyssi,RE de Boer,D Dedovich,ZY Deng,A Denig,I Denysenko,M Destefanis,F De Mori,Y Ding,C Dong,J Dong,LY Dong,MY Dong,X Dong,SX Du,YL Fan,J Fang,SS Fang,Y Fang,R Farinelli,L Fava,F Feldbauer,G Felici,CQ Feng,JH Feng,M Fritsch,CD Fu,Y Gao,YG Gao,I Garzia,PT Ge,C Geng,EM Gersabeck,K Goetzen,L Gong,WX Gong,W Gradl,M Greco,LM Gu,MH Gu,S Gu,YT Gu,CY Guan,AQ Guo,LB Guo,RP Guo,YP Guo,A Guskov,TT Han,WY Han,XQ Hao,FA Harris,H Hüsken,KL He,FH Heinsius,CH Heinz,T Held,YK Heng,C Herold,M Himmelreich,T Holtmann,YR Hou,ZL Hou,HM Hu,JF Hu,T Hu,Y Hu,GS Huang,LQ Huang,XT Huang,YP Huang,Z Huang,T Hussain,W Ikegami Andersson,W Imoehl,M Irshad,S Jaeger,S Janchiv,Q Ji,QP Ji,XB Ji,XL Ji,HB Jiang,XS Jiang,JB Jiao,Z Jiao,S Jin,Y Jin,T Johansson,N Kalantar-Nayestanaki,XS Kang,R Kappert,M Kavatsyuk,BC Ke,IK Keshk,A Khoukaz,P Kiese,R Kiuchi,R Kliemt,L Koch,OB Kolcu,B Kopf,M Kuemmel

Journal

Physical Review D

Published Date

2024/3/18

Using a data sample of 4.481× 10 8 ψ (3686) events collected with the BESIII detector, we report the first observation of the four-lepton-decays J/ψ→ e+ e− e+ e− and J/ψ→ e+ e− μ+ μ− utilizing the process ψ (3686)→ π+ π− J/ψ. The branching fractions are determined to be [5.48±0.31 (stat)±0.45 (syst)]× 10− 5 and [3.53±0.22 (stat)±0.13 (syst)]× 10− 5, respectively. The results are consistent with theoretical predictions. No significant signal is observed for J/ψ→ μ+ μ− μ+ μ−, and an upper limit on the branching fraction is set at 1.6× 10− 6 at the 90% confidence level. A C P asymmetry observable is constructed for the first two channels, which is measured to be (− 0.012±0.054±0.010) and (0.062±0.059±0.006), respectively. No evidence for C P violation is observed in this process.

Search for the semi-muonic charmonium decay J/ψ→ D− μ+ νμ+ cc

Authors

Medina Ablikim,Mikhail N Achasov,P Adlarson,XC Ai,Riccardo Aliberti,Antonio Amoroso,MR An,Qi An,Yu Bai,Olga Bakina,I Balossino,Y Ban,V Batozskaya,K Begzsuren,N Berger,M Berlowski,M Bertani,D Bettoni,F Bianchi,E Bianco,A Bortone,I Boyko,RA Briere,A Brueggemann,H Cai,X Cai,A Calcaterra,GF Cao,N Cao,SA Cetin,JF Chang,TT Chang,WL Chang,GR Che,C Chen,G Chen,HS Chen,ML Chen,SJ Chen,SM Chen,T Chen,XR Chen,XT Chen,YB Chen,YQ Chen,ZJ Chen,WS Cheng,SK Choi,X Chu,G Cibinetto,SC Coen,F Cossio,JJ Cui,HL Dai,JP Dai,A Dbeyssi,RE de Boer,D Dedovich,ZY Deng,A Denig,I Denysenko,M Destefanis,F De Mori,B Ding,XX Ding,Y Ding,J Dong,LY Dong,MY Dong,X Dong,MC Du,SX Du,ZH Duan,P Egorov,YL Fan,J Fang,SS Fang,WX Fang,Y Fang,R Farinelli,L Fava,F Feldbauer,G Felici,CQ Feng,JH Feng,K Fischer,M Fritsch,C Fritzsch,CD Fu,JL Fu,YW Fu,H Gao,YN Gao,Y Gao,S Garbolino,I Garzia,PT Ge,ZW Ge,C Geng,EM Gersabeck,A Gilman,K Goetzen,L Gong,WX Gong,W Gradl,S Gramigna,M Greco,MH Gu,YT Gu,CY Guan,ZL Guan,AQ Guo,LB Guo,MJ Guo,RP Guo,YP Guo,A Guskov,TT Han,WY Han,XQ Hao,FA Harris,KK He,KL He,FHH Heinsius,CH Heinz,YK Heng,C Herold,T Holtmann,PC Hong,GY Hou,XT Hou,YR Hou,ZL Hou,HM Hu,JF Hu,T Hu,Y Hu,GS Huang,KX Huang,LQ Huang,XT Huang,YP Huang,T Hussain,N Hüsken,W Imoehl,M Irshad,J Jackson,S Jaeger,S Janchiv,JH Jeong

Journal

Journal of High Energy Physics

Published Date

2024/1

Using (10087±44)× 10 6 J/ψ events collected with the BESIII detector at the BEPCII e+ e− storage ring at the center-of-mass energy of= 3.097 GeV, we present a search for the rare semi-muonic charmonium decay J/ψ→ D− μ+ ν μ+ cc. Since no significant signal is observed, we set an upper limit of the branching fraction to be(J/ψ→ D− μ+ ν μ+ cc)< 5.6× 10− 7 at 90% confidence level. This is the first search for the weak decay of charmonium with a muon in the final state.

Study of the and Scalar Mesons through the Decay

Authors

M Ablikim,MN Achasov,P Adlarson,R Aliberti,A Amoroso,MR An,Q An,Y Bai,O Bakina,I Balossino,Y Ban,V Batozskaya,K Begzsuren,N Berger,M Berlowski,M Bertani,D Bettoni,F Bianchi,E Bianco,J Bloms,A Bortone,I Boyko,RA Briere,A Brueggemann,H Cai,X Cai,A Calcaterra,GF Cao,N Cao,SA Cetin,JF Chang,TT Chang,WL Chang,GR Che,C Chen,Chao Chen,G Chen,HS Chen,ML Chen,SJ Chen,SM Chen,T Chen,XR Chen,XT Chen,YB Chen,YQ Chen,ZJ Chen,WS Cheng,SK Choi,X Chu,G Cibinetto,SC Coen,F Cossio,JJ Cui,HL Dai,JP Dai,A Dbeyssi,RE de Boer,D Dedovich,ZY Deng,A Denig,I Denysenko,M Destefanis,F De Mori,B Ding,XX Ding,Y Ding,J Dong,LY Dong,MY Dong,X Dong,SX Du,ZH Duan,P Egorov,YL Fan,J Fang,SS Fang,WX Fang,Y Fang,R Farinelli,L Fava,F Feldbauer,G Felici,CQ Feng,JH Feng,K Fischer,M Fritsch,C Fritzsch,CD Fu,JL Fu,YW Fu,H Gao,YN Gao,Yang Gao,S Garbolino,I Garzia,PT Ge,ZW Ge,C Geng,EM Gersabeck,A Gilman,K Goetzen,L Gong,WX Gong,W Gradl,S Gramigna,M Greco,MH Gu,YT Gu,CY Guan,ZL Guan,AQ Guo,LB Guo,RP Guo,YP Guo,A Guskov,XT Hou,TT Han,WY Han,XQ Hao,FA Harris,KK He,KL He,FH Heinsius,CH Heinz,YK Heng,C Herold,T Holtmann,PC Hong,GY Hou,YR Hou,ZL Hou,HM Hu,JF Hu,T Hu,Y Hu,GS Huang,KX Huang,LQ Huang,XT Huang,YP Huang,T Hussain,N Hüsken,W Imoehl,M Irshad,J Jackson,S Jaeger,S Janchiv,JH Jeong,Q Ji

Journal

Physical Review Letters

Published Date

2024/4/5

Using e+ e− collision data corresponding to an integrated luminosity of 7.33 fb− 1 recorded by the BESIII detector at center-of-mass energies between 4.128 and 4.226 GeV, we present an analysis of the decay D s+→ π+ π− e+ ν e, where the D s+ is produced via the process e+ e−→ D s*±D s∓. We observe the f 0 (980) in the π+ π− system and the branching fraction of the decay D s+→ f 0 (980) e+ ν e with f 0 (980)→ π+ π− measured to be (1.72±0.1 3 stat±0.1 0 syst)× 10− 3, where the uncertainties are statistical and systematic, respectively. The dynamics of the D s+→ f 0 (980) e+ ν e decay are studied with the simple pole parametrization of the hadronic form factor and the Flatté formula describing the f 0 (980) in the differential decay rate, and the product of the form factor f+ f 0 (0) and the c→ s Cabibbo-Kobayashi-Maskawa matrix element| V c s| is determined for the first time to be f+ f 0 (0)| V c s|= 0.504±0.01 7 …

Observation of the singly Cabibbo-suppressed decay

Authors

M Ablikim,MN Achasov,P Adlarson,S Ahmed,M Albrecht,R Aliberti,A Amoroso,MR An,Q An,XH Bai,Y Bai,O Bakina,R Baldini Ferroli,I Balossino,Y Ban,K Begzsuren,N Berger,M Bertani,D Bettoni,F Bianchi,J Bloms,A Bortone,I Boyko,RA Briere,H Cai,X Cai,A Calcaterra,GF Cao,N Cao,SA Cetin,JF Chang,WL Chang,DY Chen,G Chen,HS Chen,ML Chen,SJ Chen,XR Chen,YB Chen,ZJ Chen,WS Cheng,G Cibinetto,F Cossio,XF Cui,HL Dai,JP Dai,XC Dai,A Dbeyssi,RE de Boer,D Dedovich,ZY Deng,A Denig,I Denysenko,M Destefanis,F De Mori,Y Ding,C Dong,J Dong,LY Dong,MY Dong,X Dong,SX Du,P Egorov,YL Fan,J Fang,SS Fang,Y Fang,R Farinelli,L Fava,F Feldbauer,G Felici,CQ Feng,JH Feng,M Fritsch,CD Fu,Yang Gao,YG Gao,I Garzia,PT Ge,C Geng,EM Gersabeck,A Gilman,K Goetzen,L Gong,WX Gong,W Gradl,M Greco,LM Gu,MH Gu,CY Guan,AQ Guo,LB Guo,RP Guo,YP Guo,A Guskov,TT Han,WY Han,XQ Hao,FA Harris,KK He,KL He,FH Heinsius,CH Heinz,YK Heng,C Herold,M Himmelreich,T Holtmann,GY Hou,YR Hou,ZL Hou,HM Hu,JF Hu,T Hu,Y Hu,GS Huang,LQ Huang,XT Huang,YP Huang,Z Huang,T Hussain,N Hüsken,W Ikegami Andersson,W Imoehl,M Irshad,S Jaeger,S Janchiv,Q Ji,QP Ji,XB Ji,XL Ji,YY Ji,HB Jiang,XS Jiang,JB Jiao,Z Jiao,S Jin,Y Jin,MQ Jing,T Johansson,N Kalantar-Nayestanaki,XS Kang,R Kappert,M Kavatsyuk,BC Ke,IK Keshk,A Khoukaz,P Kiese,R Kiuchi,R Kliemt,L Koch

Journal

Physical review letters

Published Date

2022/4/4

The singly Cabibbo-suppressed decay Λ c+→ n π+ is observed for the first time with a statistical significance of 7.3 σ by using 3.9 fb− 1 of e+ e− collision data collected at center-of-mass energies between 4.612 and 4.699 GeV with the BESIII detector at BEPCII. The branching fraction of Λ c+→ n π+ is measured to be (6.6±1. 2 stat±0. 4 syst)× 10− 4. By taking the upper limit of branching fractions of Λ c+→ p π 0 from the Belle experiment, the ratio of branching fractions between Λ c+→ n π+ and Λ c+→ p π 0 is calculated to be larger than 7.2 at the 90% confidence level, which disagrees with most predictions of the available phenomenological models. In addition, the branching fractions of the Cabibbo-favored decays Λ c+→ Λ π+ and Λ c+→ Σ 0 π+ are measured to be (1.31±0.0 8 stat±0.0 5 syst)× 10− 2 and (1.22±0.0 8 stat±0.0 7 syst)× 10− 2, respectively, which are consistent with previous results.

Coupled-Channel Analysis of the Line Shape with BESIII Data

Authors

M Ablikim,MN Achasov,P Adlarson,XC Ai,R Aliberti,A Amoroso,MR An,Q An,Y Bai,O Bakina,I Balossino,Y Ban,V Batozskaya,K Begzsuren,N Berger,M Berlowski,M Bertani,D Bettoni,F Bianchi,E Bianco,A Bortone,I Boyko,RA Briere,A Brueggemann,H Cai,X Cai,A Calcaterra,GF Cao,N Cao,SA Cetin,JF Chang,TT Chang,WL Chang,GR Che,C Chen,Chao Chen,G Chen,HS Chen,ML Chen,SJ Chen,SM Chen,T Chen,XR Chen,XT Chen,YB Chen,YQ Chen,ZJ Chen,WS Cheng,SK Choi,X Chu,G Cibinetto,SC Coen,F Cossio,JJ Cui,HL Dai,JP Dai,A Dbeyssi,RE de Boer,D Dedovich,ZY Deng,A Denig,I Denysenko,M Destefanis,F De Mori,B Ding,XX Ding,Y Ding,J Dong,LY Dong,MY Dong,X Dong,MC Du,SX Du,ZH Duan,P Egorov,YL Fan,J Fang,SS Fang,WX Fang,Y Fang,R Farinelli,L Fava,F Feldbauer,G Felici,CQ Feng,JH Feng,K Fischer,M Fritsch,C Fritzsch,CD Fu,JL Fu,YW Fu,H Gao,YN Gao,Yang Gao,S Garbolino,I Garzia,PT Ge,ZW Ge,C Geng,EM Gersabeck,A Gilman,K Goetzen,L Gong,WX Gong,W Gradl,S Gramigna,M Greco,MH Gu,YT Gu,CY Guan,ZL Guan,AQ Guo,LB Guo,MJ Guo,RP Guo,YP Guo,A Guskov,TT Han,WY Han,XQ Hao,FA Harris,KK He,KL He,FHH Heinsius,CH Heinz,YK Heng,C Herold,T Holtmann,PC Hong,GY Hou,XT Hou,YR Hou,ZL Hou,HM Hu,JF Hu,T Hu,Y Hu,GS Huang,KX Huang,LQ Huang,XT Huang,YP Huang,T Hussain,N Hüsken,W Imoehl,M Irshad,J Jackson,S Jaeger,S Janchiv

Journal

Physical Review Letters

Published Date

2024/4/12

We perform a study of the χ c 1 (3872) line shape using the data samples of e+ e−→ γ χ c 1 (3872), χ c 1 (3872)→ D 0 D 0 π 0, and π+ π− J/ψ collected with the BESIII detector. The effects of the coupled channels and the off-shell D* 0 are included in the parametrization of the line shape. The line shape mass parameter is obtained to be M X=(3871.63±0.1 3− 0.05+ 0.06) MeV. Two poles are found on the first and second Riemann sheets corresponding to the D* 0 D 0 branch cut. The pole location on the first sheet is much closer to the D* 0 D 0 threshold than the other, and is determined to be 7.04±0.1 5− 0.08+ 0.07 MeV above the D 0 D 0 π 0 threshold with an imaginary part− 0.19±0.0 8− 0.19+ 0.14 MeV.

First measurements of the absolute branching fraction of and upper limit on

Authors

Medina Ablikim,Mikhail N Achasov,P Adlarson,Orestis Afedulidis,XC Ai,Riccardo Aliberti,Antonio Amoroso,MR An,Qi An,Yu Bai,O Bakina,I Balossino,Y Ban,H-R Bao,V Batozskaya,K Begzsuren,N Berger,M Berlowski,M Bertani,D Bettoni,F Bianchi,E Bianco,A Bortone,I Boyko,RA Briere,A Brueggemann,H Cai,X Cai,A Calcaterra,GF Cao,N Cao,SA Cetin,JF Chang,GR Che,C Chen,Chao Chen,G Chen,HS Chen,ML Chen,SJ Chen,SL Chen,SM Chen,T Chen,XR Chen,XT Chen,YB Chen,YQ Chen,ZJ Chen,ZY Chen,SK Choi,G Cibinetto,SC Coen,F Cossio,JJ Cui,HL Dai,JP Dai,A Dbeyssi,RE de Boer,D Dedovich,ZY Deng,A Denig,I Denysenko,M Destefanis,F De Mori,B Ding,XX Ding,Y Ding,J Dong,LY Dong,MY Dong,X Dong,MC Du,SX Du,ZH Duan,P Egorov,YH Fan,J Fang,SS Fang,WX Fang,Y Fang,YQ Fang,R Farinelli,L Fava,F Feldbauer,G Felici,CQ Feng,JH Feng,YT Feng,K Fischer,M Fritsch,CD Fu,JL Fu,YW Fu,H Gao,YN Gao,Yang Gao,S Garbolino,I Garzia,L Ge,PT Ge,ZW Ge,C Geng,EM Gersabeck,A Gilman,K Goetzen,L Gong,WX Gong,W Gradl,S Gramigna,M Greco,MH Gu,YT Gu,CY Guan,AQ Guo,LB Guo,MJ Guo,RP Guo,YP Guo,A Guskov,J Gutierrez,KL Han,TT Han,WY Han,XQ Hao,FA Harris,KK He,KL He,FH Heinsius,CH Heinz,YK Heng,C Herold,T Holtmann,PC Hong,GY Hou,XT Hou,YR Hou,ZL Hou,BY Hu,HM Hu,JF Hu,T Hu,Y Hu,GS Huang,KX Huang,LQ Huang,XT Huang,YP Huang,T Hussain,F Hölzken,N Hüsken

Journal

arXiv preprint arXiv:2401.09225

Published Date

2024/1/17

The absolute branching fraction of the decay is measured for the first time to be with 368.48 pb of collision data collected by the BESIII detector at the center-of-mass energies of and GeV. This result is lower than the naive prediction of 67\%, obtained from isospin symmetry, by more than , thereby indicating that the novel mechanism referred to as the \textit{threshold effect}, proposed for the strong decays of , also applies to . This measurement is necessary to obtain the coupling constants for the transitions between -wave and -wave charmed baryons in heavy hadron chiral perturbation theory. In addition, we search for the decay . No significant signal is observed, and the upper limit on its branching fraction is determined to be 80.8\% at the 90\% confidence level.

First observation of and evidence of

Authors

M Ablikim,MN Achasov,P Adlarson,XC Ai,R Aliberti,A Amoroso,MR An,Q An,Y Bai,O Bakina,I Balossino,Y Ban,H-R Bao,V Batozskaya,K Begzsuren,N Berger,M Berlowski,M Bertani,D Bettoni,F Bianchi,E Bianco,A Bortone,I Boyko,RA Briere,A Brueggemann,H Cai,X Cai,A Calcaterra,GF Cao,N Cao,SA Cetin,JF Chang,TT Chang,WL Chang,GR Che,C Chen,Chao Chen,G Chen,HS Chen,ML Chen,SJ Chen,SL Chen,SM Chen,T Chen,XR Chen,XT Chen,YB Chen,YQ Chen,ZJ Chen,SK Choi,X Chu,G Cibinetto,SC Coen,F Cossio,JJ Cui,HL Dai,JP Dai,A Dbeyssi,RE de Boer,D Dedovich,ZY Deng,A Denig,I Denysenko,M Destefanis,F De Mori,B Ding,XX Ding,Y Ding,J Dong,LY Dong,MY Dong,X Dong,MC Du,SX Du,ZH Duan,P Egorov,YH Fan,J Fang,SS Fang,WX Fang,Y Fang,YQ Fang,R Farinelli,L Fava,F Feldbauer,G Felici,CQ Feng,JH Feng,K Fischer,M Fritsch,CD Fu,JL Fu,YW Fu,H Gao,YN Gao,Yang Gao,S Garbolino,I Garzia,PT Ge,ZW Ge,C Geng,EM Gersabeck,A Gilman,K Goetzen,L Gong,WX Gong,W Gradl,S Gramigna,M Greco,MH Gu,YT Gu,CY Guan,ZL Guan,AQ Guo,LB Guo,MJ Guo,RP Guo,YP Guo,A Guskov,J Gutierrez,TT Han,WY Han,XQ Hao,FA Harris,KK He,KL He,FHH Heinsius,CH Heinz,YK Heng,C Herold,T Holtmann,PC Hong,GY Hou,XT Hou,YR Hou,ZL Hou,BY Hu,HM Hu,JF Hu,T Hu,Y Hu,GS Huang,KX Huang,LQ Huang,XT Huang,YP Huang,T Hussain,N Hüsken,M Irshad,J Jackson

Journal

Physical Review D

Published Date

2024/2/7

We present the first observation of the singly Cabibbo-suppressed decay Λ c+→ Λ K+ π 0 with a significance of 5.7 σ and the first evidence of Λ c+→ Λ K+ π+ π− decay with a significance of 3.1 σ, based on e+ e− annihilation data recorded by the BESIII detector at the BEPCII collider. The data correspond to an integrated luminosity of 6.4 fb− 1, in the center-of-mass energy range from 4.600 to 4.950 GeV. We determine the branching fractions of Λ c+→ Λ K+ π 0 and Λ c+→ Λ K+ π+ π− relative to their Cabibbo-favored counterparts to be B (Λ c+→ Λ K+ π 0) B (Λ c+→ Λ π+ π 0)=(2.09±0.3 9 stat±0.0 7 syst)× 10− 2 and B (Λ c+→ Λ K+ π+ π−) B (Λ c+→ Λ π+ π+ π−)=(1.13±0.4 1 stat±0.0 6 syst)× 10− 2, respectively. Moreover, by combining our measured result with the world average of B (Λ c+→ Λ π+ π 0), we obtain the branching fraction B (Λ c+→ Λ K+ π 0)=(1.49±0.2 7 stat±0.0 5 syst±0.0 8 ref)× 10− 3. This result …

Search for the production of deuterons and antideuterons in e^+ e^-annihilation at center-of-mass energies between 4.13 and 4.70 GeV

Authors

M Ablikim,MN Achasov,P Adlarson,O Afedulidis,R Aliberti,A Amoroso,MR An,Q An,Y Bai,O Bakina,I Balossino,Y Ban,V Batozskaya,K Begzsuren,N Berger,M Berlowski,M Bertani,D Bettoni,F Bianchi,E Bianco,A Bortone,I Boyko,RA Briere,A Brueggemann,H Cai,X Cai,A Calcaterra,GF Cao,N Cao,SA Cetin,JF Chang,GR Che,C Chen,Chao Chen,G Chen,HS Chen,ML Chen,SJ Chen,SL Chen,SM Chen,T Chen,XR Chen,XT Chen,YB Chen,YQ Chen,ZJ Chen,ZY Chen,WS Cheng,SK Choi,X Chu,G Cibinetto,SC Coen,F Cossio,JJ Cui,HL Dai,JP Dai,A Dbeyssi,RE de Boer,D Dedovich,ZY Deng,A Denig,I Denysenko,M Destefanis,F De Mori,B Ding,Y Ding,J Dong,LY Dong,MY Dong,X Dong,SX Du,ZH Duan,P Egorov,YH Fan,YL Fan,J Fang,SS Fang,WX Fang,Y Fang,R Farinelli,L Fava,F Feldbauer,G Felici,CQ Feng,JH Feng,K Fischer,M Fritsch,CD Fu,YW Fu,H Gao,YN Gao,Yang Gao,S Garbolino,I Garzia,L Ge,PT Ge,ZW Ge,C Geng,EM Gersabeck,A Gilman,K Goetzen,L Gong,WX Gong,W Gradl,S Gramigna,M Greco,MH Gu,YT Gu,CY Guan,ZL Guan,AQ Guo,LB Guo,MJ Guo,RP Guo,YP Guo,A Guskov,TT Han,WY Han,XQ Hao,FA Harris,KK He,KL He,FH Heinsius,CH Heinz,YK Heng,C Herold,T Holtmann,PC Hong,GY Hou,XT Hou,YR Hou,ZL Hou,BY Hu,HM Hu,JF Hu,T Hu,Y Hu,GS Huang,KX Huang,LQ Huang,XT Huang,YP Huang,T Hussain,F Hölzken,N Hüsken,W Imoehl,J Jackson,S Jaeger,S Janchiv,JH Jeong

Journal

arXiv preprint arXiv:2402.11207

Published Date

2024/2/17

Using a data sample of collision data corresponding to an integrated luminosity of 19 fb collected with the BESIII detector at the BEPCII collider, we search for the production of deuterons and antideuterons via for the first time at center-of-mass energies between 4.13 and 4.70 GeV. No significant signal is observed and the upper limit of the cross section is determined to be from 9.0 to 145 fb depending on the center-of-mass energy at the confidence level.

Investigation of the Rule and Test of Symmetry through the Measurement of Decay Asymmetry Parameters in Decays

Authors

M Ablikim,MN Achasov,P Adlarson,XC Ai,R Aliberti,A Amoroso,MR An,Q An,Y Bai,O Bakina,I Balossino,Y Ban,V Batozskaya,K Begzsuren,N Berger,M Berlowski,M Bertani,D Bettoni,F Bianchi,E Bianco,A Bortone,I Boyko,RA Briere,A Brueggemann,H Cai,X Cai,A Calcaterra,GF Cao,N Cao,SA Cetin,JF Chang,TT Chang,WL Chang,GR Che,C Chen,Chao Chen,G Chen,HS Chen,ML Chen,SJ Chen,SL Chen,SM Chen,T Chen,XR Chen,XT Chen,YB Chen,YQ Chen,ZJ Chen,WS Cheng,SK Choi,X Chu,G Cibinetto,SC Coen,F Cossio,JJ Cui,HL Dai,JP Dai,A Dbeyssi,RE de Boer,D Dedovich,ZY Deng,A Denig,I Denysenko,M Destefanis,F De Mori,B Ding,XX Ding,Y Ding,J Dong,LY Dong,MY Dong,X Dong,MC Du,SX Du,ZH Duan,P Egorov,YH Fan,J Fang,SS Fang,WX Fang,Y Fang,R Farinelli,L Fava,F Feldbauer,G Felici,CQ Feng,JH Feng,K Fischer,M Fritsch,CD Fu,JL Fu,YW Fu,H Gao,YN Gao,Yang Gao,S Garbolino,I Garzia,PT Ge,ZW Ge,C Geng,EM Gersabeck,A Gilman,K Goetzen,L Gong,WX Gong,W Gradl,S Gramigna,M Greco,MH Gu,YT Gu,CY Guan,ZL Guan,AQ Guo,LB Guo,MJ Guo,RP Guo,YP Guo,A Guskov,TT Han,WY Han,XQ Hao,FA Harris,KK He,KL He,FHH Heinsius,CH Heinz,YK Heng,C Herold,T Holtmann,PC Hong,GY Hou,XT Hou,YR Hou,ZL Hou,HM Hu,JF Hu,T Hu,Y Hu,GS Huang,KX Huang,LQ Huang,XT Huang,YP Huang,T Hussain,N Hüsken,M Irshad,J Jackson,S Jaeger,S Janchiv,JH Jeong

Journal

Physical Review Letters

Published Date

2024/3/6

Using (10 087±44)× 10 6 J/ψ events collected with the BESIII detector, numerous Ξ− and Λ decay asymmetry parameters are simultaneously determined from the process J/ψ→ Ξ− Ξ+→ Λ (p π−) π− Λ (n π 0) π+ and its charge-conjugate channel. The precisions of α Λ 0 for Λ→ n π 0 and α Λ 0 for Λ→ n π 0 compared to world averages are improved by factors of 4 and 1.7, respectively. The ratio of decay asymmetry parameters of Λ→ n π 0 to that of Λ→ p π−,⟨ α Λ 0⟩/⟨ α Λ−⟩, is determined to be 0.873±0.01 2− 0.010+ 0.011, where the first and the second uncertainties are statistical and systematic, respectively. The ratio is smaller than unity more than 5 σ, which signifies the existence of the Δ I= 3/2 transition in Λ for the first time. Besides, we test for C P symmetry in Ξ−→ Λ π− and in Λ→ n π 0 with the best precision to date.

Search for , , and

Authors

Journal

Physical Review D

Published Date

2024/4/5

A search has been performed for the semileptonic decays D 0→ K S 0 K− e+ ν e, D+→ K S 0 K S 0 e+ ν e, and D+→ K+ K− e+ ν e, using 7.9 fb− 1 of e+ e− annihilation data collected at the center-of-mass energy s= 3.773 GeV by the BESIII detector operating at the BEPCII collider. No significant signals are observed, and upper limits are set at the 90% confidence level of 2.13× 10− 5, 1.54× 10− 5, and 2.10× 10− 5 for the branching fractions of D 0→ K S 0 K− e+ ν e, D+→ K S 0 K S 0 e+ ν e, and D+→ K+ K− e+ ν e, respectively.

Partial Wave Analysis of

Authors

M Ablikim,MN Achasov,P Adlarson,S Ahmed,M Albrecht,M Alekseev,A Amoroso,FF An,Q An,Y Bai,O Bakina,R Baldini Ferroli,I Balossino,Y Ban,K Begzsuren,JV Bennett,N Berger,M Bertani,D Bettoni,F Bianchi,J Biernat,J Bloms,I Boyko,RA Briere,H Cai,X Cai,A Calcaterra,GF Cao,N Cao,SA Cetin,J Chai,JF Chang,WL Chang,DY Chen,G Chen,HS Chen,JC Chen,ML Chen,SJ Chen,YB Chen,W Cheng,G Cibinetto,F Cossio,XF Cui,HL Dai,JP Dai,XC Dai,A Dbeyssi,D Dedovich,ZY Deng,A Denig,I Denysenko,M Destefanis,F De Mori,Y Ding,C Dong,J Dong,LY Dong,MY Dong,ZL Dou,SX Du,JZ Fan,J Fang,SS Fang,Y Fang,R Farinelli,L Fava,F Feldbauer,G Felici,CQ Feng,M Fritsch,CD Fu,Y Fu,Q Gao,XL Gao,Y Gao,YG Gao,Z Gao,B Garillon,I Garzia,EM Gersabeck,A Gilman,K Goetzen,L Gong,WX Gong,W Gradl,M Greco,LM Gu,MH Gu,S Gu,YT Gu,AQ Guo,LB Guo,RP Guo,YP Guo,A Guskov,S Han,XQ Hao,FA Harris,KL He,FH Heinsius,T Held,YK Heng,M Himmelreich,YR Hou,ZL Hou,HM Hu,JF Hu,T Hu,Y Hu,GS Huang,JS Huang,XT Huang,XZ Huang,N Huesken,T Hussain,W Ikegami Andersson,W Imoehl,M Irshad,Q Ji,QP Ji,XB Ji,XL Ji,HL Jiang,XS Jiang,XY Jiang,JB Jiao,Z Jiao,DP Jin,S Jin,Y Jin,T Johansson,N Kalantar-Nayestanaki,XS Kang,R Kappert,M Kavatsyuk,BC Ke,IK Keshk,A Khoukaz,P Kiese,R Kiuchi,R Kliemt,L Koch,OB Kolcu,B Kopf,M Kuemmel,M Kuessner,A Kupsc,M Kurth,MG Kurth

Journal

Physical Review D

Published Date

2019/8/14

A partial-wave analysis of the decay J/ψ→ K+ K− π 0 has been made using (223.7±1.4)× 10 6 J/ψ events collected with the BESIII detector in 2009. The analysis, which is performed within the isobar-model approach, reveals contributions from K 2*(1430)±, K 2*(1980)±and K 4*(2045)±decaying to K±π 0. The two latter states are observed in J/ψ decays for the first time. Two resonance signals decaying to K+ K− are also observed. These contributions cannot be reliably identified and their possible interpretations are discussed. The measured branching fraction B (J/ψ→ K+ K− π 0) of (2.88±0.01±0.12)× 10− 3 is more precise than previous results. Branching fractions for the reported contributions are presented as well. The results of the partial-wave analysis differ significantly from those previously obtained by BESII and BABAR.

See List of Professors in Sebastian Jäger University(University of Sussex)

Sebastian Jäger FAQs

What is Sebastian Jäger's h-index at University of Sussex?

The h-index of Sebastian Jäger has been 33 since 2020 and 41 in total.

What are Sebastian Jäger's top articles?

The articles with the titles of

Search for a muonphilic scalar or vector via decays at BESIII

Study of the doubly Cabibbo-suppressed decays and

Observation of Significant Flavor-SU(3) Breaking in the Kaon Wave Function at and Discovery of the Charmless Decay

Measurement of the cross sections at from 2.3094 to 3.0800 GeV

Search for di-photon decays of an axion-like particle in radiative decays of J/psi

Observation of the Anomalous Shape of X (1840) in J/ψ→ γ3 (π^{+} π^{-}) Indicating a Second Resonance Near pp [over¯] Threshold

Observation of two structures in the processes and

Updated measurements of the M1 transition with

...

are the top articles of Sebastian Jäger at University of Sussex.

What are Sebastian Jäger's research interests?

The research interests of Sebastian Jäger are: Theoretical Particle Physics

What is Sebastian Jäger's total number of citations?

Sebastian Jäger has 9,194 citations in total.

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