6533b7d0fe1ef96bd125a16a
RESEARCH PRODUCT
Study ofJ/ψ→pp¯andJ/ψ→nn¯
Zhenyu ZhangW. LaiZ. NingTao HuS. L. LiR. B. FerroliX. S. QinC. NicholsonS. S. SunM. H. YeP. L. WangF. F. JingXing LuJ. H. ZouJ. ZhongC. Morales MoralesX. L. LuoM. N. AchasovJ. X. ZuoM. UllrichX. B. JiK. GoetzenX. D. RuanA. SarantsevA. SarantsevZ. P. MaoX. K. ZhouX. H. ZhaoH. H. ZhangW. M. DingY. NefedovX. D. SunJ. C. ChenX. L. JiS. P. YuH. X. YangYao WangK. J. ZhuXuantong ZhangLing ZhaoLei ZhaoZ. Y. HeYang YangZ. A. LiuA. ZhemchugovA. ZhemchugovM. WangZ. JiaoTalib HussainY. S. ZhangJ. S. HuangZ. G. WangH. Y. ZhangM. PelizaeusZhiqing LiuJ. S. LangeH. S. ZhaoR. E. MitchellD. H. ZhangS. J. ZhaoX. R. ZhouJ. L. FuJingwei ZhaoJ. F. HuJ. P. DaiChang-zheng YuanG. M. XuX. CaiS. P. WenY. F. LiangL. Y. DongChun S. J. PunNiklaus BergerY. BanQ. A. MalikCheng LiT. HeldL. L. WangChunyan ZhuA. Q. GuoC. L. LuoT. C. ZhaoJ. L. PingJ. Y. ZhangX. Y. ZhangR. PolingH. J. LuZ. J. XiaoFang LiuLei ZhouShaodan MaM. G. ZhaoJ. MinL. ZhangX. L. LiM. L. ChenD. DedovichXingtao HuangA. DenigP. L. WangX. F. WangHuihui LiuY. YuanD. H. SunZhiqiang LiuMiao HeYi-fang ZhaoX. P. XuS. H. ZhuShouguang JinF. E. MaasQ. AnY. P. HuangR. G. PingZ. A. ZhuY. T. LiangB. ZhengD. M. LiX. R. LiYu-bin LiuB. Y. ZhangV. BytevX. Q. HaoJ. G. MesschendorpP. L. LiuB. HuangL. S. WangN. Kalantar-nayestanakiM. H. YeX. H. MoTao LuoH. Y. ShengH. M. HuY. QinQ. J. WangJ. P. LiuS. X. WuH. H. LiuM. GrecoS. SpataroK. H. RashidS. G. WangFeng LiuY. H. ZhengI. B. NikolaevY. J. SunJianping ZhengX. LiuXian Lun ZhuWei LiX. L. WangU. WiednerQ. L. XiuJ. ZhangC. D. FuW. L. YuanGuangyu ZhaoM. LvJ. G. ZhangM. KavatsyukSai-juan ChenD. P. JinA. CalcaterraC. X. YuJ. Q. ZhangG. X. SunW. G. LiC. L. MaXiujuan TangL. B. GuoH. S. ChenKai LiuJ. C. LiKun LiuJ. F. SunK. PetersY. P. LuShisong FangG. R. LiaoQun-yao WangC. S. JiE. PrencipeG. M. HuangG. F. XuQ. JiT. YangX. T. LiaoD. TothA. ZalloI. DenysenkoE. BogerE. BogerH. XuF. C. MaC. X. LiuY. K. HengJ. W. ZhangQ. J. LiH. M. LiuHang LiuN. WuL. G. XiaY. S. ZhuJ. F. QiuG. S. VarnerF. F. AnS. PacettiY. H. GuanY. J. MaoB. WangZ. Y. DengMichael WernerX. H. LiuZ. P. ZhengM. BertaniM. R. ShepherdFeng XueCui LiB. X. YuX. N. LiY. B. LiuY. H. YanQ. J. XuH. LoehnerD. H. WeiY. XuN. B. LiB. ZhongW. KuehnJ. ZhuangL. H. WuM. X. LuoT. J. MinQingming MaS. H. ZhangQ ZhaoB. X. ZhangH. YeChang LiuJie YuD. J. AmbroseZhihao XuChuan LiuT. R. ZhangM. H. GuZhibing LiZ. H. QinGuo-ming ChenC. MotzkoS. L. OlsenG. LiZ. L. HouK. J. ZhuG. R. LuJ. FangJ. F. ChangM. QiG. F. CaoXiang LiC. GengZ. XueJ. K. BeckerG. RongY. P. GuoJ. K. C. LeungJ. B. JiaoY. P. ChuJunguang LuC. F. QiaoG. ChelkovG. ChelkovXiaobo ZhuYang GaoN. Yu. MuchnoiY. H. ZhangQ. W. LuQ. G. WenY. M. ZhuZ. Y. WangM. MaggioraK. LiE. H. ThorndikeYuanbo ChenX. S. JiangS. B. LiuLei LiZ. P. ZhangT. MaH. B. LiuHua-bin LiB. S. ZouY. ZhangYuehong XieWei WuH. MaoH. L. MaM. ShaoM. Y. DongZ. G. ZhaoY. X. YangHai LiangP. WeidenkaffYulei HanKunlun HeDaniel P Cronin-hennessyY. Z. SunW. B. YanL. L. JiangZ. H. AnB. SpruckXueyong ShenF. FeldbauerZujian WangZhi-jun SunJ. Z. BaiY. T. GuLi YanFu-hu LiuY. F. WangF. A. HarrisZhe SunY. B. ChenX. Y. MaJ. Z. ZhangChunmei ZhangK. WangC. Q. FengC. H. LiB. Q. WangY. MaC. P. ShenC. P. ShenH. P. ChengY. Q. WangZ. WuM. AblikimA. A. ZafarK. Y. LiuH. L. TianC. J. TangK. X. ZhaoH. L. DaiS. X. DuI. BoykoJ. SchulzeY. ZengJ. M. BianY. DingRoy A. BriereS. QianL. K. JiaXie-yan SongQ. OuyangFeng LiO. BondarenkoL. FavaL. FavaBrent J. LiuM. DestefanisW. X. GongJoong-won ParkW. Gradlsubject
BaryonPhysicsNuclear and High Energy PhysicsQCD sum rulesProtonElectron–positron annihilationPhase angleAnalytical chemistryHigh Energy Physics::ExperimentAstrophysics::Earth and Planetary AstrophysicsNucleonAntineutronBar (unit)description
The decays J/psi -> p (p) over bar and J/psi -> n (n) over bar have been investigated with a sample of 225.2 x 10(6) J/psi events collected with the BESIII detector at the BEPCII e(+)e(-) collider. The branching fractions are determined to be B(J/psi -> p (p) over bar) = (2.112 +/- 0.004 +/- 0.031 x 10(-3) and B(J/psi -> n (n) over bar) =(2.07 +/- 0.01 +/- 0.17) x 10(-3). Distributions of the angle theta between the proton or antineutron and the beam direction are well described by the form 1 + alpha cos(2)theta, and we find alpha = 0.595 +/- 0.012 +/- 0.015 for J/psi -> p (p) over bar and alpha = 0.50 +/- 0.04 +/- 0.21 for J/psi -> n (n) over bar. Our branching- fraction results suggest a large phase angle between the strong and electromagnetic amplitudes describing the J/psi -> N (N) over bar decay.
year | journal | country | edition | language |
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2012-08-31 | Physical Review D |