6533b870fe1ef96bd12cf389
RESEARCH PRODUCT
Measurement of the Cross Section for e+e−→Ξ−Ξ¯+ and Observation of an Excited Ξ Baryon
M. AblikimM. N. AchasovP. AdlarsonS. AhmedM. AlbrechtM. AlekseevA. AmorosoF. F. AnQ. AnY. BaiO. BakinaR. Baldini FerroliI. BalossinoY. BanK. BegzsurenJ. V. BennettN. BergerM. BertaniD. BettoniF. BianchiJ. BiernatJ. BlomsI. BoykoR. A. BriereH. CaiX. CaiA. CalcaterraG. F. CaoN. CaoS. A. CetinJ. ChaiJ. F. ChangW. L. ChangG. ChelkovD. Y. ChenG. ChenH. S. ChenJ. C. ChenM. L. ChenS. J. ChenY. B. ChenW. ChengG. CibinettoF. CossioX. F. CuiH. L. DaiJ. P. DaiX. C. DaiA. DbeyssiD. DedovichZ. Y. DengA. DenigI. DenysenkoM. DestefanisF. De MoriY. DingC. DongJ. DongL. Y. DongM. Y. DongZ. L. DouS. X. DuJ. Z. FanJ. FangS. S. FangY. FangR. FarinelliL. FavaF. FeldbauerG. FeliciC. Q. FengM. FritschC. D. FuY. FuQ. GaoX. L. GaoY. GaoY. GaoY. G. GaoZ. GaoB. GarillonI. GarziaE. M. GersabeckA. GilmanK. GoetzenL. GongW. X. GongW. GradlM. GrecoL. M. GuM. H. GuS. GuY. T. GuA. Q. GuoL. B. GuoR. P. GuoY. P. GuoA. GuskovS. HanX. Q. HaoF. A. HarrisK. L. HeF. H. HeinsiusT. HeldY. K. HengM. HimmelreichY. R. HouZ. L. HouH. M. HuJ. F. HuT. HuY. HuG. S. HuangJ. S. HuangX. T. HuangX. Z. HuangN. HueskenT. HussainW. Ikegami AnderssonW. ImoehlM. IrshadQ. JiQ. P. JiX. B. JiX. L. JiH. L. JiangX. S. JiangX. Y. JiangJ. B. JiaoZ. JiaoD. P. JinS. JinY. JinT. JohanssonN. Kalantar-nayestanakiX. S. KangR. KappertM. KavatsyukB. C. KeI. K. KeshkA. KhoukazP. KieseR. KiuchiR. KliemtL. KochO. B. KolcuB. KopfM. KuemmelM. KuessnerA. KupscM. KurthM. G. KurthW. KühnJ. S. LangeP. LarinL. LavezziH. LeithoffT. LenzC. LiCheng LiD. M. LiF. LiF. Y. LiG. LiH. B. LiH. J. LiJ. C. LiJ. W. LiKe LiL. K. LiLei LiP. L. LiP. R. LiQ. Y. LiW. D. LiW. G. LiX. H. LiX. L. LiX. N. LiZ. B. LiZ. Y. LiH. LiangH. LiangY. F. LiangY. T. LiangG. R. LiaoL. Z. LiaoJ. LibbyC. X. LinD. X. LinY. J. LinB. LiuB. J. LiuC. X. LiuD. LiuD. Y. LiuF. H. LiuFang LiuFeng LiuH. B. LiuH. M. LiuHuanhuan LiuHuihui LiuJ. B. LiuJ. Y. LiuK. LiuK. Y. LiuKe LiuL. Y. LiuQ. LiuS. B. LiuT. LiuX. LiuX. Y. LiuY. B. LiuZ. A. LiuZhiqing LiuY. F. LongX. C. LouH. J. LuJ. D. LuJ. G. LuY. LuY. P. LuC. L. LuoM. X. LuoP. W. LuoT. LuoX. L. LuoS. LussoX. R. LyuF. C. MaH. L. MaL. L. MaM. M. MaQ. M. MaX. N. MaX. X. MaX. Y. MaY. M. MaF. E. MaasM. MaggioraS. MaldanerS. MaldeQ. A. MalikA. MangoniY. J. MaoZ. P. MaoS. MarcelloZ. X. MengJ. G. MesschendorpG. MezzadriJ. MinT. J. MinR. E. MitchellX. H. MoY. J. MoC. Morales MoralesN. Yu. MuchnoiH. MuramatsuA. MustafaS. NakhoulY. NefedovF. NerlingI. B. NikolaevZ. NingS. NisarS. L. NiuS. L. OlsenQ. OuyangS. PacettiY. PanM. PapenbrockP. PatteriM. PelizaeusH. P. PengK. PetersJ. PetterssonJ. L. PingR. G. PingA. PitkaR. PolingV. PrasadH. R. QiM. QiT. Y. QiS. QianC. F. QiaoN. QinX. P. QinX. S. QinZ. H. QinJ. F. QiuS. Q. QuK. H. RashidK. RavindranC. F. RedmerM. RichterA. RivettiV. RodinM. RoloG. RongCh. RosnerM. RumpA. SarantsevM. SavriéY. SchelhaasK. SchoenningW. ShanX. Y. ShanM. ShaoC. P. ShenP. X. ShenX. Y. ShenH. Y. ShengX. ShiX. D. ShiJ. J. SongQ. Q. SongX. Y. SongS. SosioC. SowaS. SpataroF. F. SuiG. X. SunJ. F. SunL. SunS. S. SunX. H. SunY. J. SunY. K. SunY. Z. SunZ. J. SunZ. T. SunY. T. TanC. J. TangG. Y. TangX. TangV. ThorenB. TsedneeI. UmanB. WangB. L. WangC. W. WangD. Y. WangK. WangL. L. WangL. S. WangM. WangM. Z. WangMeng WangP. L. WangR. M. WangW. P. WangX. WangX. F. WangX. L. WangY. WangY. WangY. F. WangY. Q. WangZ. WangZ. G. WangZ. Y. WangZongyuan WangT. WeberD. H. WeiP. WeidenkaffF. WeidnerH. W. WenS. P. WenU. WiednerG. WilkinsonM. WolkeL. H. WuL. J. WuZ. WuL. XiaY. XiaS. Y. XiaoY. J. XiaoZ. J. XiaoY. G. XieY. H. XieT. Y. XingX. A. XiongQ. L. XiuG. F. XuJ. J. XuL. XuQ. J. XuW. XuX. P. XuF. YanL. YanW. B. YanW. C. YanY. H. YanH. J. YangH. X. YangL. YangR. X. YangS. L. YangY. H. YangY. X. YangYifan YangZ. Q. YangM. YeM. H. YeJ. H. YinZ. Y. YouB. X. YuC. X. YuJ. S. YuT. YuC. Z. YuanX. Q. YuanY. YuanA. YuncuA. A. ZafarY. ZengB. X. ZhangB. Y. ZhangC. C. ZhangD. H. ZhangH. H. ZhangH. Y. ZhangJ. ZhangJ. L. ZhangJ. Q. ZhangJ. W. ZhangJ. Y. ZhangJ. Z. ZhangK. ZhangL. ZhangS. F. ZhangT. J. ZhangX. Y. ZhangY. ZhangY. H. ZhangY. T. ZhangYang ZhangYao ZhangYi ZhangYu ZhangZ. H. ZhangZ. P. ZhangZ. Y. ZhangG. ZhaoJ. W. ZhaoJ. Y. ZhaoJ. Z. ZhaoLei ZhaoLing ZhaoM. G. ZhaoQ. ZhaoS. J. ZhaoT. C. ZhaoY. B. ZhaoZ. G. ZhaoA. ZhemchugovB. ZhengJ. P. ZhengY. ZhengY. H. ZhengB. ZhongL. ZhouL. P. ZhouQ. ZhouX. ZhouX. K. ZhouX. R. ZhouXiaoyu ZhouXu ZhouA. N. ZhuJ. ZhuJ. ZhuK. ZhuK. J. ZhuS. H. ZhuW. J. ZhuX. L. ZhuY. C. ZhuY. S. ZhuZ. A. ZhuJ. ZhuangB. S. ZouJ. H. Zousubject
Systematic errorPhysicsParticle physicsForm factor (quantum field theory)General Physics and AstronomyState (functional analysis)01 natural sciencesResonance (particle physics)Measure (mathematics)BaryonCross section (physics)Excited state0103 physical sciences010306 general physicsdescription
Using a total of 11.0 fb−1 of e+e− collision data with center-of-mass energies between 4.009 and 4.6 GeV and collected with the BESIII detector at BEPCII, we measure fifteen exclusive cross sections and effective form factors for the process e+e−→Ξ−Ξ¯+ by means of a single baryon-tag method. After performing a fit to the dressed cross section of e+e−→Ξ−Ξ¯+, no significant ψ(4230) or ψ(4260) resonance is observed in the Ξ−Ξ¯+ final states, and upper limits at the 90% confidence level on ΓeeB for the processes ψ(4230)/ψ(4260)→Ξ−Ξ¯+ are determined. In addition, an excited Ξ baryon at 1820 MeV/c2 is observed with a statistical significance of 6.2–6.5σ by including the systematic uncertainty, and the mass and width are measured to be M=(1825.5±4.7±4.7) MeV/c2 and Γ=(17.0±15.0±7.9) MeV, which confirms the existence of the JP=32− state Ξ(1820).
year | journal | country | edition | language |
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2020-01-24 | Physical Review Letters |