Measurements of Normalized Differential Cross Sections of Inclusive η Production in e+e− Annihilation at Energy from 2.0000 to 3.6710 GeV

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Goetzen,L Gong,W X Gong,W Gradl,S Gramigna,M Greco,M H Gu,Y T Gu,C Y Guan,Z L Guan,A Q Guo,L B Guo,M J Guo,R P Guo,Y P Guo,A Guskov,J Gutierrez,K L Han,T T Han,F Hanisch,X Q Hao,F A Harris,K K He,K L He,F H Heinsius,C H Heinz,Y K Heng,C Herold,T Holtmann,P C Hong,G Y Hou,X T Hou,Y R Hou,Z L Hou,B Y Hu,H M Hu,J F Hu,S L Hu,T Hu,Y Hu,G S Huang,K X Huang,L Q Huang,X T Huang,Y P Huang,T Hussain,F Hölzken,N Hüsken,N Hüsken,N In Der Wiesche,J Jackson,S Janchiv,J H Jeong,Q Ji,Q P Ji,W Ji,X B Ji,X L Ji,Y Y Ji,X Q Jia,Z K Jia,D Jiang,H B Jiang,P C Jiang,S S Jiang,T J Jiang,X S Jiang,Y Jiang,J B Jiao,J K Jiao,Z Jiao,S Jin,Y Jin,M Q Jing,X M Jing,T Johansson,S Kabana,N Kalantar-Nayestanaki,X L Kang,X S Kang,M Kavatsyuk,B C Ke,V Khachatryan,A Khoukaz,R Kiuchi,O B Kolcu,B Kopf,M Kuessner,X Kui,N Kumar,A Kupsc,W Kühn,J J Lane,P Larin,L Lavezzi,T T Lei,Z H Lei,M Lellmann,T Lenz,C Li,C Li,C H Li,Cheng Li,D M Li,F Li,G Li,H B Li,H J Li,H N Li,Hui Li,J R Li,J S Li,Ke Li,L J Li,L K Li,Lei Li,M H Li,M Y 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Wang,Y D Wang,Y F Wang,Y L Wang,Y N Wang,Y Q Wang,Yaqian Wang,Yi Wang,Z Wang,Z L Wang,Z Y Wang,Ziyi Wang,D H Wei,F Weidner,S P Wen,Y R Wen,U Wiedner,G Wilkinson,M Wolke,L Wollenberg,C Wu,J F Wu,L H Wu,L J Wu,X Wu,X H Wu,Y Wu,Y H Wu,Y J Wu,Z Wu,L Xia,X M Xian,B H Xiang,T Xiang,D Xiao,G Y Xiao,S Y Xiao,Y L Xiao,Z J Xiao,C Xie,X H Xie,Y Xie,Y G Xie,Y H Xie,Z P Xie,H X Xing,T Y Xing,C F Xu,C J Xu,G F Xu,H Y Xu,M Xu,Q J Xu,Q N Xu,W Xu,W L Xu,X P Xu,Y C Xu,Z P Xu,Z S Xu,F Yan,L Yan,W B Yan,W C Yan,X Q Yan,H J Yang,H L Yang,H X Yang,Tao Yang,Y Yang,Y F Yang,Y X Yang,Yifan Yang,Z W Yang,Z P Yao,M Ye,M H Ye,J H Yin,Z Y You,B X Yu,C X Yu,G Yu,J S Yu,T Yu,X D Yu,Y C Yu,C Z Yuan,J Yuan,L Yuan,S C Yuan,Y Yuan,Y J Yuan,Z Y Yuan,C X Yue,A A Zafar,F R Zeng,S H Zeng,X Zeng,Y Zeng,Y J Zeng,X Y Zhai,Y C Zhai,Y H Zhan,A Q Zhang,B L Zhang,B X Zhang,D H Zhang,G Y Zhang,H Zhang,H Zhang,H C Zhang,H H Zhang,H H Zhang,H Q Zhang,H R Zhang,H Y Zhang,J Zhang,J Zhang,J J Zhang,J L Zhang,J Q Zhang,J S Zhang,J W Zhang,J X Zhang,J Y Zhang,J Z Zhang,Jianyu Zhang,L M Zhang,Lei Zhang,P Zhang,Q Y Zhang,R Y Zhang,Shuihan Zhang,Shulei Zhang,X D Zhang,X M Zhang,X Y Zhang,Y Zhang,Y T Zhang,Y H Zhang,Y M Zhang,Yan Zhang,Yao Zhang,Z D Zhang,Z H Zhang,Z L Zhang,Z Y Zhang,Z Y Zhang,Z Z Zhang,G Zhao,J Y Zhao,J Z Zhao,Lei Zhao,Ling Zhao,M G Zhao,N Zhao,R P Zhao,S J Zhao,Y B Zhao,Y X Zhao,Z G Zhao,A Zhemchugov,B Zheng,B M Zheng,J P Zheng,W J Zheng,Y H Zheng,B Zhong,X Zhong,H Zhou,J Y Zhou,L P Zhou,S Zhou,X Zhou,X K Zhou,X R Zhou,X Y Zhou,Y Z Zhou,J Zhu,K Zhu,K J Zhu,K S Zhu,L Zhu,L X Zhu,S H Zhu,S Q Zhu,T J Zhu,W D Zhu,Y C Zhu,Z A Zhu,J H Zou,J Zu,Besiii Collaboration

doi:10.1103/physrevlett.133.021901

Measurements of Normalized Differential Cross Sections of Inclusive η Production in e+e− Annihilation at Energy from 2.0000 to 3.6710 GeV

M Ablikim, M N Achasov + Show 664 more

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https://doi.org/10.1103/physrevlett.133.021901

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Journal: Physical Review Letters	Publication Date: Jul 9, 2024
License type: CC BY 4.0

#Hadron Mass Corrections #BEPCII Storage Ring + Show 8 more

Abstract
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Abstract

Using data samples collected with the BESIII detector operating at the BEPCII storage ring, the cross section of the inclusive process e+e−→η+X, normalized by the total cross section of e+e−→hadrons, is measured at eight center-of-mass energy points from 2.0000 to 3.6710 GeV. These are the first measurements with momentum dependence in this energy region. Our measurement shows a significant discrepancy compared to the existing fragmentation functions. To address this discrepancy, a new QCD analysis is performed at the next-to-next-to-leading order with hadron mass corrections and higher twist effects, which can explain both the established high-energy data and our measurements reasonably well. Published by the American Physical Society 2024

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