6533b7d5fe1ef96bd1264f31

RESEARCH PRODUCT

Observation of D0→K1(1270)−e+νe

L. Q. QinH. K. SunX. WangL. J. WuX. WuS. QianF. De MoriX. H. MoM. H. YeXiao-rui LyuY. J. MoW. H. WangS. H. ZhuQ. AnJialun PingT. YuMeng WangX. Y. ZhangL. D. LiuF. LiF. C. MaX. L. WangX. K. ZhouL. L. WangH. CaiP. P. SuJ. B. LiuY. G. GaoW. H. WangT. LiuJ. F. QiuY. F. WangJ. ZhaoH. J. LiL. FavaZhi YangC. ZhongY. J. SunYifan YangL. Q. HuangX. S. QinJ. F. ShangguanMuhammad IrshadY. D. WangQ. P. JiK. X. SuF. A. HarrisW. L. ChangWenbin QianJ. Q. LiA. Q. GuoWen-zhao LiuH. LeithoffM. Y. DongS. AhmedY. X. YangC. X. LiuT. HussainY. P. LuX. Y. ShenX. Y. MaH. B. LiC. H. HeinzM. HimmelreichJianyu ZhangL. GongW. X. GongX. Y. ZhouA. LavaniaH. B. LiuJ. BlomsA. G. DenigC. L. LuoQ. ZhouI. B. NikolaevI. UmanR. KappertA. PathakG. F. XuHuimin WangC. F. RedmerJ. D. LuC. SchnierY. Q. WangB. C. KeY. T. TianS. NakhoulS. GuC. W. WangG. RongJ. H. YinLei ZhangW. ImoehlY. BanP. WeidenkaffF. H. HeinsiusY. SchelhaasZ. NingS. Y. XiaoJ. F. SunY. DingS. JaegerS. P. WenX. T. HuangZ. J. XiaoB. KopfW. Y. HanB. J. LiuT. Y. XingD. Y. ChenQ. ZhaoY. Z. SunK. L. HeZiyi WangM. Z. WangXujin YuanJ. H. ZouX. R. ZhouQ. M. MaCheng LiB. WangM. ShaoY. T. GuC. X. YueXiang ZhouI. K. KeshkJ. ZhangX. LiuM. KavatsyukP. LarinG. WilkinsonS. B. LiuX. L. JiH.j. WangW. KühnB. ZhongL. B. GuoH. MuramatsuA. N. ZhuUlrich WiednerP. KieseYuan HouC. X. LinR. A. BriereW. S. ChengYao ZhangJimin ZhaoT. Y. QiG. LiJ. L. ZhangF. F. SuiM. H. GuK. H. QiL. YanS. MarcelloY. ZengYanping HuangXu ShanZ. Y. YouA. SarantsevD. H. WeiJ. S. LangeM. RumpGang ZhaoZ. A. ZhuW. C. YanG. Y. TangR. KiuchiY. C. ZhuH. C. ShiH. LiX. S. JiangZ. X. MengL. ZhangY. NefedovY. YuanJ. L. LiuZ. J. ChenM. BertaniX. H. BaiSerkant Ali CetinM. H. YeShan JinK. GoetzenL. YangX. S. KangP. T. GeJie ZhaoAlexey ZhemchugovH. M. HuM. G. ZhaoZhe SunS. LussoX. X. MaC. D. FuD. Y. LiuC. X. YuJ. L. LiC. GengA. YuncuJ. B. JiaoM. RoloC. Q. FengB. X. ZhangS. ZhangW. J. ZhuJinfei WuC. P. ShenM. X. LuoDylan Jaide WhiteJ. ZhuWei XuN. HüskenN. HüskenS. S. SunX. H. XieX. F. WangP. AdlarsonMagnus WolkeA. A. ZafarX. R. ChenR. FarinelliH. J. LuJ. G. LuY. G. XieW. H. TianSi LiB. ZhengR. G. PingL. Y. DongChristoph HeroldYuyi WangGuangshun HuangM. KuessnerY. F. LiangD. V. DedovichR. AlibertiW. P. WangZ. Y. DengR. S. ShiStephen Lars OlsenLi ZhouH. B. JiangJiawei ZhangXiangcheng PanW. M. SongY. Y. JiQ. LiuT. HeldH. L. MaT. LenzD. M. LiS. X. DuK. H. RashidY. B. ChenJ. Z. ZhangY. K. HengR. E. MitchellXingguo LiZhiqing LiuH. Y. ZhangY. L. FanK. RavindranM. GrecoLibo ZhangZ. Y. YuanW. GradlY. H. ZhengH. S. SangJ. J. SongF. NerlingZ. H. QinZujian WangL. L. MaHaiwen LiuL. SunF. E. MaasY. X. SongR. KliemtY. T. LiangM. R. AnM. PelizaeusTao SunX. DongY. BaiA. AmorosoT. HuJie FengD. Y. WangY. H. ZhengM. QiH. J. YangF. FeldbauerFang LiuA. MangoniG. A. ChelkovT. JohanssonJ. F. ChangA. DbeyssiI. DenysenkoTong ZhuG. F. ChenPeilian LiuCong-feng QiaoS. J. ChenYi ZhangA. GuskovFeng LiuJie YuH. QiA. CalcaterraZ. G. ZhaoT. HoltmannJ. Y. ZhangL. Z. LiaoK. Y. LiuN. Yu. MuchnoiM. AblikimXiaoyu LiL. LavezziAngelo RivettiC. H. LiY. X. ZhaoV. PrasadO. BakinaJ. Y. LiuR. P. GuoS. Q. QuW. Ikegami AnderssonY. H. ZhangY. H. XieK. J. ZhuY. X. TanF. CossioW. G. LiRuiting MaY. P. GuoX. L. LuG. CibinettoK. J. ZhuY. Y. WangM. MaggioraZ. QianM. M. MaO. B. KolcuZhiyong ZhangAndrzej KupscY. K. SunLing ZhaoZ. HuangP. W. LuoZ. Y. WangL. H. WuP. X. ShenZ. WuShuai LiuLei ZhaoH. H. ZhangZ. L. HouT. T. HanFeng YanQ. P. JiS. SpataroYi JinX. P. XuH. R. QiYu-xiao LiuL. XiaD. C. ShanM. KuemmelMatthew Glenn KurthX. CaiM. L. ChenS. J. ZhaoL. K. LiS. JanchivM. AlbrechtGuangyi ZhangY. ZhangR. E. De BoerV. RodinW. ShanG. X. SunZhiqing ZhangH. XiaoZiyuan LiZ. JiaoFu-hu LiuLei LiM. LellmannC. Z. YuanN. CaoY. B. ZhaoX. B. JiS. MaldanerP. PatteriW. D. LiQ. J. XuX. D. ZhangA. BortoneXuanhong LouX. F. CuiX. Q. HaoViktor ThorénYan ZhangJiangqiao HuG. F. CaoJ. DongF. X. LuW. B. YanNasser Kalantar-nayestanakiX D ShiY. J. MaoM. N. AchasovS. NisarC. J. TangYue PanI. BalossinoH. X. YangY. HuY. P. LuS. PacettiZ. A. LiuY. H. TanXu YanKe LiHuihui LiuR. T. MaC. DongS. SosioJ. G. MesschendorpEvelina GersabeckS. F. ZhangJiaming LiX. D. ShiKrisztian PetersJoachim PetterssonS. L. YangJ. TangYunlong ZhangM. H. LiuX. SunG. R. LiaoD. BettoniR. PolingJianping ZhengH. LiangT. J. MinK. Y. LiuI. GarziaJ. J. ZhangL. KochA. KhoukazR. Baldini FerroliA. GilmanM. DestefanisY. C. XuC. LiM. FritschS. MaldeM. Z. WangH. Y. ZhangJianhao ZhangJ. X. TengKe LiuJ. LibbyYaquan FangHaiping PengJohn Jake LaneGuoqiang YuK. SchoenningY. GaoB. S. ZouNiklaus BergerQ. A. MalikG. MezzadriKe WangW. Y. SunL. M. GuP. R. LiZ. P. MaoLi YuanJ. FangCh. RosnerTao LuoB. X. YuShulei ZhangH. S. ChenH. L. DaiIgor BoykoX. L. LuoK. BegzsurenF. BianchiZongyuan WangZ. H. LeiF. WeidnerQ. OuyangS. S. FangC. Y. GuanX. P. QinY. B. LiuHuanhuan LiuG. FeliciX. H. LiL. WollenbergM. ScodeggioXingchao Dai

subject

PhysicsSemileptonic decayParticle physics010308 nuclear & particles physicsBranching fraction0103 physical sciencesGeneral Physics and Astronomy010306 general physics01 natural sciencesEnergy (signal processing)

description

Using 2.93 fb^{-1} of e^{+}e^{-} collision data taken with the BESIII detector at a center-of-mass energy of 3.773 GeV, the observation of the D^{0}→K_{1}(1270)^{-}e^{+}ν_{e} semileptonic decay is presented. The statistical significance of the decay D^{0}→K_{1}(1270)^{-}e^{+}ν_{e} is greater than 10σ. The branching fraction of D^{0}→K_{1}(1270)^{-}e^{+}ν_{e} is measured to be (1.09±0.13_{-0.16}^{+0.09}±0.12)×10^{-3}. Here, the first uncertainty is statistical, the second is systematic, and the third originates from the assumed branching fraction of K_{1}(1270)^{-}→K^{-}π^{+}π^{-}. The fraction of longitudinal polarization in D^{0}→K_{1}(1270)^{-}e^{+}ν_{e} is determined for the first time to be 0.50±0.19_{stat}±0.08_{syst}.

https://doi.org/10.1103/physrevlett.127.131801