6533b828fe1ef96bd12878ef
RESEARCH PRODUCT
Evidence for e+e−→γηc(1S) at center-of-mass energies between 4.01 and 4.60 GeV
Y. F. WangJ. V. BennettX. Y. MaW. X. GongX. H. SunP. LarinH. J. LuJ. G. LuYaquan FangKai LiuM. KuemmelF. E. MaasOrhan CakirP. KieseS. L. OlsenX. S. JiangR. FarinelliS. L. NiuF. Y. LiX. Q. LiY. F. LongM. GrecoX. N. MaT. HuK. Y. LiuZ. B. LiW. Ikegami AnderssonJ. F. ChangL. ZhangS. GuD. Y. LiuY. NefedovJ. B. JiaoY. T. LiangH. L. MaD. M. LiO. BakinaMagnus WolkeYuekun HengY. H. ZhengK. J. LiH. MuramatsuCong-feng QiaoY. F. LiangXiao-rui LyuK. SchoenningQ. Y. LiB. S. ZouD. P. JinN. Yu. MuchnoiN. Yu. MuchnoiX. S. KangY. H. ZhangDan WangR. KliemtCui LiZ. Y. WangYi ChenP. X. ShenX. K. ChuNiklaus BergerM. PelizaeusDayong WangN. QinZ. WuJ. Z. BaiF. FeldbauerG. Y. TangH. L. DaiX. H. XieGueorgui ChelkovGueorgui ChelkovGueorgui ChelkovJ. PellegrinoMichael PapenbrockJie ZhaoD. X. LinH. M. HuJ. ZhuLing ZhaoS. Q. ZhangM. AlbrechtW. M. SongM. RoloG. R. LiaoLei ZhaoY. G. GaoY. BanZ. L. HouQ AnZhiqing ZhangT. HoltmannM. FritschQ. OuyangM. AlekseevB. Q. WangJ. Y. LiuZ. J. XiaoT. Y. QiG. S. VarnerJie YuY. X. XiaS. H. ZhuJ. F. SunJ. MinM. KavatsyukC. Z. YuanH. B. LiF. F. AnM. KuhlmannS. S. FangG. CibinettoA. DbeyssiS. MarcelloGuo-ming ChenY. ZengC. L. LuoM. N. AchasovM. N. AchasovQ. GaoY. N. GaoKe WangB. KopfJin LiY. ZhangXiaofeng ZhuJ. Z. ZhangY. H. YangJ. J. SongL. SunK. L. HeP. L. LiA. ZhemchugovA. ZhemchugovY. B. LiuC. C. ZhangO. DorjkhaidavX. L. GaoT. J. MinK. J. ZhuM. Z. WangB. ZhongL. B. GuoM. G. ZhaoJimin ZhaoS. AhmedY. X. YangP. F. DuanR. P. GuoY. H. XieGuangshun HuangGianfranco MorelloB. X. ZhangL. YanA. PitkaQ. A. MalikUlrich WiednerB. L. WangM. R. ShepherdH. LiangC. DongS. SosioQ. ZhaoDmitri DedovichY. Z. SunG. FeliciX. L. JiXiang ZhouT. C. ZhaoI. B. NikolaevI. B. NikolaevXiaozhong HuangGang ZhaoT. MaM. H. YeAndrzej KupscTalib HussainZ. Y. DengA. CalcaterraS. QianC. LengJialun PingA. AmorosoA. Q. GuoG. RongJ. P. DaiJ. P. DaiK. ZhangJ. Q. ZhangZ. G. ZhaoJ. M. BianS. J. ZhaoYanwei WangX. Y. ZhangS. FeganA. YuncuA. YuncuJianhao ZhangX. B. JiY. G. XieH. J. LiM. QiJ. H. WeiS. X. DuM. LaraKe LiuH. H. ZhangB. X. YuZ. L. DouH. J. YangH. J. YangQ. L. XiuP. PatteriQ. J. XuX. Y. JiangZhi ZengL. D. LiuJoachim PetterssonZ. J. SunXuanhong LouM. M. MaJ. C. ChenH. CaiNasser Kalantar-nayestanakiL. Y. DongC. Morales MoralesY. J. SunZ. G. WangF. BianchiH. Y. ZhangY. P. LuM. H. GuJ. C. LiHaiwen LiuS. B. LiuJ. Y. ZhangZahra HaddadiJ. ZhuangH. Y. ShengA. DenigM. X. LuoY. DingL. YangIgor BoykoM. Y. DongJ. B. LiuB. J. LiuC. X. YuM. TiemensH. B. LiuY. PanYao WangD. BettoniJ. H. ZouM. DestefanisX. CaiS. S. SunW. GradlW. KühnM. RipkaX. S. QinJ. ChaiD. Y. WangM. L. ChenG. MezzadriZ. Y. YouW. J. ZhengL. KochA. KhoukazB. ZhengR. E. MitchellX. Q. HeYu ZhangZ. A. ZhuG. X. SunR. G. PingZ. T. SunF. De MoriL. P. ZhouY. M. MaBingxuan LiuBingxuan LiuS. JinR. Baldini FerroliZ. P. MaoG. LiC. P. ShenM. AblikimSai-juan ChenJ. FangTao LiZ. JiaoFu-hu LiuD. H. ZhangC. D. FuC. Q. FengZ. GaoCh. RosnerF. NerlingP. WeidenkaffF. H. HeinsiusX. Y. ZhouT. KhanXingguo LiS. P. WenX. R. ZhouR. PolingCheng LiC. SowaY. B. ZhaoW. ShanX. N. LiX. FangJ. DongPeilian LiuZhiyong ZhangX. F. WangHaiping PengY. Q. WangS. NisarZ. L. HuangFeng LiuP. L. WangQ. M. MaC. J. TangX. L. LuoY. HuY. P. LuA. MustafaZ. A. LiuX. H. MoL. S. WangM. H. YeYunlong ZhangD. XiaoL. L. WangJ. L. ZhangJianping ZhengS. ZhuX. Y. NiuJun-yi ZhangY. P. GuoZ. P. ZhangJ. H. YinK. H. RashidK. H. RashidY. YuanM. ShaoY. T. GuY. S. ZhuM. BertaniE. FioravantiD. W. BennettC. HuX. L. KangX. TangA. SarantsevA. SarantsevD. H. WeiP. R. LiP. R. LiJ. S. LangeZujian WangY. BaiX. LiuK. J. ZhuL. J. WuY. J. MoZ. H. WangH. R. QiH. S. ChenT. WeberShun-jia HuangQ. P. JiSerkant Ali CetinLiqing XuX. Y. ShenC. F. RedmerC. SchnierX. K. ZhouFang LiuI. DenysenkoW. C. YanX. T. HuangQ. LiuK. GoetzenB. Y. ZhangA. A. ZafarL. L. MaL. GongM. KornicerR. A. BriereA. JulinBibo KeW. B. YanS. PacettiG. F. XuM. MaggioraG. F. CaoKe LiP. L. WangX. Y. SongJ. J. XuH. LeithoffJ. S. HuangC. X. LiuX. R. ChenW. D. LiB. T. TsedneeZhiqing LiuT. JohanssonO. B. KolcuO. B. KolcuF. LiL. LavezziX. Q. HaoI. TapanF. C. MaF. A. HarrisY. H. YanM. RichterZ. NingJ. W. ZhaoV. PrasadS. HanY. C. ZhuW. P. WangH. XiaoJ. F. QiuE. BogerE. BogerT. HeldL. FavaL. H. WuZ. H. QinM. SavrieYi JinW. G. LiY. K. SunL. XiaY. J. XiaoQ. P. JiS. SpataroX. P. XuLei LiY. J. MaoH. X. YangI. GarziaZ. X. MengX. A. XiongB. GarillonHuihui LiuJ. G. MesschendorpKlaus PetersKlaus PetersQiunan XuI. Umansubject
PhysicsParticle physics010308 nuclear & particles physicsBranching fractionElectron–positron annihilationSigma01 natural sciencesNuclear physicsCross section (physics)0103 physical sciencesHigh Energy Physics::ExperimentCenter of massBorn approximationNuclear Experiment010306 general physicsdescription
We present first evidence for the process e(+)e(-) -> gamma eta(c)(1S) at six center-of-mass energies between 4.01 and 4.60 GeV using data collected by the BESIII experiment operating at BEPCII. We measure the Born cross section at each energy using a combination of twelve eta(c)(1S) decay channels. We also combine all six energies under various assumptions for the energy-dependence of the cross section. If the process is assumed to proceed via the Y(4260), we measure a peak Born cross section sigma(peak)(e(+)e(-) -> gamma eta(c)(1S)) = 2.11 +/- 0.49 (stat.) +/- 0.36 (syst.) pb with a statistical significance of 4.2 sigma.
year | journal | country | edition | language |
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2017-09-06 | Physical Review D |