First observation of the decay χcJ→Σ+p¯KS0+c.c.(J=0,1,2)

M Ablikim,P Adlarson,J Fang,J C Li ,B X Zhang ,M Maggiora,W L Chang ,X L Luo ,Z Y Li ,Y Schelhaas,H Y Sheng ,L S Wang ,B C Ke ,Zhi Wang ,J P Dai ,S Lusso,K Zhang,N Cao,B Tsednee,Y Ban,Q M ,G Wilkinson,Z Ning,Z Zhao ,X Y ,M Albrecht,Lei Zhang,Y Q Wang ,Ke Liu,M Y Dong ,X K Zhou ,X L Ji ,Meng Wang,A Q Guo ,Y R Hou ,B Zheng,H B Liu ,P Larin,J L Ping ,J V Bennett ,X B Ji ,H L ,F A Harris ,N Yu Muchnoi ,Y B Liu ,T J Min ,M Pelizaeus,C W Wang ,T Johansson,K Peters,B Wang,V Prasad,Yang Zhang,F De Mori,X P Qin ,Q Gao,T Weber,W Xu,X Tang,Z L Dou ,M Alekseev,L H Wu ,H L Jiang ,L Y Dong ,U Wiedner,W B Yan ,G R Liao ,Xinxia Cai ,Yu Zhang,J Chen,T Luo,I Balossino,K L He ,S S Sun ,F H Heinsius ,J Y Zhao ,J Z Fan ,J W Zhang ,Z Yang ,H Leithoff,J G Messchendorp ,M Savrié,J Z Zhao ,J W Zhao ,Y K Sun ,Huanhuan Liu,Z Wang,X L Wang ,H H Zhang ,Q Zhou,L Y Liu ,X S Kang ,S Han,X F Cui ,R A Briere ,S L Olsen ,Y P Guo ,Z Jiao,D P Jin ,M Destefanis,A Khoukaz,Q L Xiu ,Y Zhu ,Y Hu,J Zhu,Zongyuan Wang,M Greco,D H Zhang ,T Hu,Z G Wang ,S Marcello,Xiaozhong Huang ,M Wang,W G Li ,P L Li ,X X ,Zhao Liu ,C L Luo ,X N ,D Bettoni,H Peng ,M Shao,J F Qiu ,F H Liu ,D X Lin ,W Kühn,Y T Tan ,X L Li ,Y T Zhang ,R Farinelli,J F Sun ,Q Q Song ,Markus Richter ,J Pettersson,X A Xiong ,S Ahmed,B Kopf,L Koch,Xu Li ,Y Nefedov,X Wang,R M Wang ,G X Sun ,Min Jiang ,Fang Liu,M Rump,S A Çetin ,S J Chen ,C Sowa,R P Guo ,M Kuemmel,S L Yang ,X P Xu ,M X Luo ,J B Jiao ,Ling Zhao,Y B Zhao ,I R Boyko ,Z A Zhu ,B L Wang ,Y S Zhu ,G Chen,F Cossio,P L Wang ,M Z Wang ,H L Dai ,Hao Wen ,S Jin,X C Dai ,Y Jin,T J Zhang ,Y Xie ,L L Wang ,D Y Liu ,G Y Tang ,S J Zhao ,F C ,J Y Zhang ,C H Li ,S Spataro,J Zhang,Y Ding,C Q Feng ,R X Yang ,Y H Zheng ,C Z Yuan ,N Kalantar‐Nayestanaki ,Q Ouyang,J Y Liu ,A Denig,B X Yu ,W P Wang ,F E Maas ,Jingjing Xu ,D Y Wang ,Ké Li ,I Uman,Y K Heng ,Xiaojie Jiang ,X Y Jiang ,Z Meng ,L Sun,Z H Zhang ,L L ,Z A Liu ,N Berger,A Yuncu,A Gilman,J Q Zhang ,K Ravindran,Y Mao ,B Y Zhang ,Z L Hou ,F Li,Ch Rosner,J Z Zhang ,G Zhao,H X Yang ,M Papenbrock,I B Nikolaev ,C X Liu ,Z P Zhang ,Y T Gu ,Q J Xu ,C J Tang ,J Biernat,Y Gao,X Y Liu ,S Nisar,V Thoren,J Chai,J S Lange ,G Chelkov,R Kappert,Y F Long ,Feng Liu,Yi Zhang,Q Ji,Y Yang ,S Q Qu ,J Libby,M Kuessner,F Feldbauer,Z Y Deng ,B Liu,X Q Yuan ,W D Li ,Z Y You ,L Z Liao ,X Y Shen ,S F Zhang ,Y Wang,A Sarantsev,S J Qian ,H M Hu ,K Liu,Y J Xiao ,L Lavezzi,J H Yin ,Y H Yan ,I Garzia,E Gersabeck ,C X Yu ,T Liu,V Rodin,Y Z Sun ,K J Zhu ,X Y Zhang ,D H Wei ,G S Huang ,J J Song ,C C Zhang ,A Dbeyssi,B Zhong,Z J Sun ,B S Zou ,Y F Wang ,C F Qiao ,Yifan Yang,M M ,J F Chang ,L J Wu ,T Yu,O B Kolcu ,J F Hu ,Han Liu ,A Mustafa,X Shi,T Hussain,N Huesken,L B Guo ,Y M ,W Gradl,Q A Malik ,L Gong,X H Sun ,X R Zhou ,C X Lin ,Q Zhao,R G Ping ,A Amoroso,S Sosio,X Lou ,Y Xia,B Garillon,C X Yue ,H M Liu ,A Guskov,S Malde,L Yan,M Kavatsyuk,M G Zhao ,C P Shen ,H B Li ,X T Huang ,Yao Zhang,R E Mitchell ,Chao Dong ,W S Cheng ,L M Gu ,L Zhang,M L Chen ,L Xia,M Irshad,M Himmelreich,Z B Li ,J S Huang ,Y J Sun ,L Fava,G Cibinetto,Huihui Liu,F F Sui ,G Li,Cheng Li,G F Cao ,T Y Xing ,H Cai,X Q Hao ,P X Shen ,C D Fu ,D Dedovich,J Dong,S Y Xiao ,R Kiuchi,A Pitka,K Begzsuren,C Li,O Bakina,H Muramatsu,Z J Xiao ,J Bloms,Zhou Li ,M G Kurth ,Lei Li,Z H Qin ,A Rivetti,M Fritsch,X R Lyu ,H Y Zhang ,A Kupść ,Y F Liang ,X F Wang ,R Poling,H J Li ,Y J Mo ,W X Gong ,L Yang,Y Fang,J D Lu ,X H Li ,S X Du ,M Rolo,Q An,J B Liu ,P R Li ,W Shan,K H Rashid ,X S Qin ,T Lenz,Y T Liang ,W J Zhu ,D M Li ,W C Yan ,C Morales Morales,X Liu,Y Yuan,M H Ye ,P Kiese,Y B Chen ,S Gu,Z Y Wang ,H J Lü ,Y Zhang,Y Pan,J L Zhang ,A Mangoni,S Pacetti,J P Zheng ,K Schoenning,Y Zeng,R Kliemt,S H Zhu ,J Zhuang,X Y Zhou ,G F Xu ,K Goetzen,A Zhemchugov,Y Lu,K Y Liu ,S B Liu ,Y Bai,T Held,Q Liu,T C Zhao ,F Nerling,Y Zheng,S Maldaner,A Calcaterra,М Н Ачасов ,G Rong,K Wang,D Liu,F Bianchi,Zhiqing Liu,P Patterí ,S P Wen ,A A Zafar ,H S Chen ,G Mezzadri,X Zhu ,X L Gao ,D Y Chen ,K Zhu,Z T Sun ,M Wolke,A N Zhu ,F Weidner,M Bertani,M H Gu ,Z Y Zhang ,Y H Zhang ,Y P Lu ,S S Fang ,P Weidenkaff,F Yan,X N Li ,M Ye,S Nakhoul,Y J Lin ,W Ikegami Andersson,I Denysenko,X Y Song ,W Imoehl,I K Keshk ,H J Yang ,S L Niu ,R Baldini Ferroli,J G Lu ,M Qi,X Y Shan ,J S Yu ,B J Liu ,P W Luo ,F F An ,X H Mo ,L K Li ,Z P Mao ,Y Fu,G Felici,C F Redmer ,J H Zou

doi:10.1103/physrevd.100.092006

Abstract

Using E1 radiative transitions ψ(3686)→γχcJ from a sample of (448.1±2.9)×106 ψ(3686) events collected with the BESIII detector, the decays χcJ→Σ+p¯KS0+c.c.(J=0,1,2) are studied. The decay branching fractions are measured to be B(χc0→Σ+p¯KS0+c.c.)=(3.52±0.19±0.21)×10−4, B(χc1→Σ+p¯KS0+c.c.)=(1.53±0.10±0.08)×10−4, and B(χc2→Σ+p¯KS0+c.c.)=(8.25±0.83±0.49)×10−5, where the first and second uncertainties are the statistical and systematic ones, respectively. No evident intermediate resonances are observed in the studied processes.Received 27 September 2019DOI:https://doi.org/10.1103/PhysRevD.100.092006Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.Published by the American Physical SocietyPhysics Subject Headings (PhySH)Research AreasBranching fractionHadronic decaysParticle decaysPhysical SystemsBaryonsHadronsMesonsParticles & Fields

Highlights

The first charmonium states with JPC 1⁄4 Jþþ discovered after the J=ψ and ψð3686Þ were the χcJðJ 1⁄4 0; 1; 2Þ particles
There are only a few experimental studies of χcJ to BB M (M stands for meson). These channels are ideal to search for new excited baryons in intermediate states, which decay into B M and BM
The cylindrical core of the BESIII detector consists of a helium-based multilayer drift chamber (MDC), a plastic scintillator time-of-flight system (TOF), and a CsI (Tl) electromagnetic calorimeter (EMC), which are all enclosed in a superconducting solenoidal magnet providing a 1.0 T magnetic field

Summary

INTRODUCTION

The first charmonium states with JPC 1⁄4 Jþþ discovered after the J=ψ and ψð3686Þ were the χcJðJ 1⁄4 0; 1; 2Þ particles. The world’s largest data set of ψð3686Þ events [1] collected with the BESIII [2] detector, provides a unique opportunity for detailed studies of χcJ decays, since they are copiously produced in ψð3686Þ radiative transitions with branching fractions of about 9% each [3]. The search for new excited baryon states is important to improve knowledge of the baryon spectrum and the understanding of the underlying processes which describe confinement in the nonperturbative QCD regime. There are only a few experimental studies of χcJ to BB M (M stands for meson) These channels are ideal to search for new excited baryons in intermediate states, which decay into B M and BM. We report on a search for possible excited baryon states in the invariant-mass spectra of p K0S, and ΣþK0S

BESIII DETECTOR

DATA SET AND MONTE CARLO SIMULATION

DATA ANALYSIS

SYSTEMATIC UNCERTAINTIES