Measurement of Azimuthal Asymmetries in Inclusive Charged Dipion Production in e^{+}e^{-} Annihilations at sqrt[s]=3.65 GeV.

M Ablikim,P Weidenkaff,S Zhu,L Zotti,F De Mori,Cheng Li,K Moriya,J Dong,W Shan,Z Gao,A Dbeyssi,L Fava,A Zallo,Feng Liu,J Pettersson,Q Gao,A Sarantsev,J Zhuang,T Hussain,X Cai,M Bertani,S Sosio,G Felici,M Ullrich,H Loehner,Z Haddadi,X Tang,G Zhao,Yu Zhang,B Zhong,Z Jiao,B Kloss,S Schumann,V Prasad,R Kliemt,T Hu,J Fang,M Maggiora,S Pacetti,M Lara,B Kopf,A Zhemchugov,M Tiemens,S Nisar,V Santoro,W Kühn,M Albrecht,Ling Zhao,S Spataro,M Fritsch,Q Ouyang,K Peters,Q Ji,P Kiese,S Marcello,Z Ning,K Goetzen,C Leng,L Yang,A Yuncu,Y Yuan,H Liang,W Gradl,Jin Li,H Muramatsu,Y Huang,M Ripka,I Denysenko,Q Zhao,F Nerling,M Savrié,Y Lu,G Rong,Q An,F Feldbauer,M Greco,A Hafner,Y Gao,N Yu Muchnoi,L Yan,H Cai,M Kornicer,Y Yang,A Denig,S Jin,T Luo,Y Ban,Lei Li,M Kavatsyuk,I Uman,T Weber,M Shao,D Bettoni,O Albayrak,M Qi,T Held,C Morales Morales,Y Xia,Fang Liu,D Xiao,R Poling,E Boger,Ch Rosner,B Zheng,H Xiao,Zhiqing Liu,R Baldini Ferroli,M Wolke,Y Zeng,S Han,Y Guo,A Julin,I Tapan,A Amoroso,Y Nefedov,P Larin,I Garzia,M Pelizaeus,A Calcaterra,U Wiedner,K Schoenning,G Cibinetto,C Dong,Y Ding,Y Hu,T Johansson,M Destefanis,Y Fang,N Qin,F Bianchi,E Fioravanti,Z G Wang ,F Li ,L L Wang ,M L Chen ,D V Dedovich ,X Y Jiang ,O Çakır ,H B Liu ,J Z Zhang ,J Y Liu ,X Gao ,J W Zhao ,C P Shen ,W B Yan ,B C Ke ,Shuo Wen ,G R Liao ,X Ai ,B Y Zhang ,H Peng ,Q J Xu ,O B Kolcu ,M Ye ,Qin Liu ,J V Bennett ,M H Gu ,A A Zafar ,Xin Fang ,W G Li ,Q M ,S J Chen ,L W Jiang ,Y T Liang ,Q P Ji ,J S Huang ,X S Kang ,Z Y Zhang ,X Y Niu ,Z H Zhang ,Xiangdong Ji ,J M Bian ,H S Chen ,H L Dai ,J L Zhang ,Y Zhang ,Z J Xiao ,Y Zhu ,Z A Liu ,X Lou ,C Li ,T C Zhao ,J G Messchendorp ,J Lu ,Y H Yan ,Z Y Wang ,X D Ruan ,G Varner ,Min Jiang ,K Y Liu ,Y J Mo ,G X Sun ,X N Li ,M Y Dong ,W Wang ,H X Yang ,P R Li ,H P Cheng ,J P Dai ,X R Zhou ,H H Zhang ,L B Guo ,I R Boyko ,Z H Qin ,K Wang ,H B Li ,S S Fang ,B J Liu ,H H Liu ,L L ,Y H Guan ,P Patterí ,D Y Wang ,H J Yang ,S J Zhao ,Z B Li ,H M Hu ,Z L Hou ,X Q Hao ,J P Zheng ,Y T Zhang ,H Y Sheng ,L D Liu ,J H Yin ,G M Huang ,J Q Zhang ,W X Gong ,Xiao Hu Mo ,X T Huang ,D H Wei ,H L ,Xiaoyu Zhu ,Zhao Liu ,A Kupść ,F F An ,Q Liu ,R A Briere ,S S Sun ,Y B Liu ,K Zhang ,X Liu ,N Kalantar‐Nayestanaki ,T Li ,X L Luo ,X K Chu ,Y Q Wang ,D Ambrose ,J F Sun ,B X Yu ,Z Mao ,K Liu ,Y Zheng ,F E Maas ,J Y Zhang ,J B Wei ,Z J Sun ,L H Wu ,Y Xie ,F C ,C Q Feng ,X Jiang ,Y N Zhang ,C Zhang ,X S Qin ,R G Ping ,J F Qiu ,Y T Gu ,Y F Wang ,M Wang ,D M Li ,Xu Li ,Y F Liang ,S H Zhu ,J W Zhang ,X Q Li ,J Z Bai ,K H Rashid ,Y B Zhao ,Pengfei Duan ,G A Chelkov ,B X Zhang ,X F Wang ,Zhou Li ,М Н Ачасов ,Z Y Deng ,J B Liu ,Z H Wang ,Kang He ,G F Cao ,M X Luo ,B S Zou ,P X Shen ,Z T Sun ,C X Yu ,D W Bennett ,X Y Shen ,L Y Dong ,X R Chen ,J C Chen ,D Wang ,Y Z Sun ,H M Liu ,S J Qian ,J F Hu ,E Eren ,J F Chang ,S G Wang ,G Li ,J S Yu ,C L Luo ,K J Zhu ,Y K Heng ,J S Lange ,S A Çetin ,W L Yuan ,J Fan ,J C Li ,Hu Chen ,Y P Guo ,J Liu ,X Y Song ,Zhi Wang ,K Li ,X Q He ,P L Wang ,H Y Zhang ,J J Zhang ,I B Nikolaev ,J P Liu ,Z Zhao ,S X Du ,C.d Fu ,J L Ping ,X L Kang ,C X Liu ,X Y Zhang ,L Xia ,S L Niu ,Xiaorong Zhou ,M G Zhao ,X L Li ,F H Liu ,C Z Yuan ,Yongfeng Zhu ,C C Zhang ,Z A Zhu ,D X Lin ,X Y ,Y H Zhang ,J B Jiao ,Yifan Yang ,F Y Li ,E H Thorndike ,Z P Zhang ,X R Lyu ,R E Mitchell ,B Wang ,W M Song ,Y Mao ,F A Harris ,A Q Guo ,M H Ye ,X M Li ,H Y Chen ,W J Zheng ,Q L Xiu ,X N ,C F Qiao ,G F Xu ,Y B Chen ,Tian Ma ,G Chen ,S B Liu ,W D Li ,C J Tang ,G S Huang ,C F Redmer ,X Chen ,P Wang ,S L Olsen ,X P Xu ,L Zhang ,Y D Wang ,D P Jin ,Xiang Zhou ,D H Zhang ,P L Liu ,L S Wang ,Y J Sun ,Z Wang ,H J Lü ,J H Zou

doi:10.1103/physrevlett.116.042001

Measurement of Azimuthal Asymmetries in Inclusive Charged Dipion Production in e^{+}e^{-} Annihilations at sqrt[s]=3.65 GeV.

M Ablikim, P Weidenkaff + Show 390 more

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https://doi.org/10.1103/physrevlett.116.042001

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Journal: Physical Review Letters	Publication Date: Jan 27, 2016
Citations: 46	License type: publisher-specific, author manuscript

Affiliation: Johannes Gutenberg University Mainz, University of Science and Technology Liaoning, University of Turin, University of Science and Technology of China, Indiana University, Peking University, University of Eastern Piedmont Amadeo Avogadro, Central China Normal University, Joint Institute for Nuclear Research, University of the Punjab, University of Giessen, University of Groningen, Chinese Academy of Sciences, Nanjing Normal University, University of Perugia, Ruhr University Bochum, COMSATS University Islamabad, GSI Helmholtz Centre for Heavy Ion Research, Wuhan University, Seoul National University, University of Minnesota, Nanjing University, Budker Institute of Nuclear Physics, University of Hawaii System, Beijing Institute of Petrochemical Technology, Doğuş University, Carnegie Mellon University, University of South China, Hunan University, Uludağ University, Uppsala University, Nankai University, Liaoning University

#Fragmentation Function #Inclusive Process + Show 8 more

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Abstract

We present a measurement of the azimuthal asymmetries of two charged pions in the inclusive process e^{+}e^{-}→ππX, based on a data set of 62 pb^{-1} at the center-of-mass energy of 3.65GeV collected with the BESIII detector. These asymmetries can be attributed to the Collins fragmentation function. We observe a nonzero asymmetry, which increases with increasing pion momentum. As our energy scale is close to that of the existing semi-inclusive deep inelastic scattering experimental data, the measured asymmetries are important inputs for the global analysis of extracting the quark transversity distribution inside the nucleon and are valuable to explore the energy evolution of the spin-dependent fragmentation function.

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