6533b81ffe1ef96bd1277974

RESEARCH PRODUCT

First measurement of polarizations in the decay $D^0 \to ωϕ$

Besiii CollaborationM. AblikimM. N. AchasovP. AdlarsonS. AhmedM. AlbrechtR. AlibertiA. AmorosoM. R. AnQ. AnX. H. BaiY. BaiO. BakinaR. Baldini FerroliI. BalossinoY. BanK. BegzsurenN. BergerM. BertaniD. BettoniF. BianchiJ. BlomsA. BortoneI. BoykoR. A. BriereH. CaiX. CaiA. CalcaterraG. F. CaoN. CaoS. A. CetinJ. F. ChangW. L. ChangG. ChelkovD. Y. ChenG. ChenH. S. ChenM. L. ChenS. J. ChenX. R. ChenY. B. ChenZ. J ChenW. S. ChengG. CibinettoF. CossioX. F. CuiH. L. DaiJ. P. DaiX. C. DaiA. DbeyssiR. E. De BoerD. DedovichZ. Y. DengA. DenigI. DenysenkoM. DestefanisF. De MoriY. DingC. DongJ. DongL. Y. DongM. Y. DongX. DongS. X. DuY. L. FanJ. FangS. S. FangY. FangR. FarinelliL. FavaF. FeldbauerG. FeliciC. Q. FengJ. H. FengM. FritschC. D. FuY. GaoY. GaoY. GaoY. G. GaoI. GarziaP. T. GeC. GengE. M. GersabeckA GilmanK. GoetzenL. GongW. X. GongW. GradlM. GrecoL. M. GuM. H. GuY. T. GuC. Y GuanA. Q. GuoL. B. GuoR. P. GuoY. P. GuoA. GuskovT. T. HanW. Y. HanX. Q. HaoF. A. HarrisK. L. HeF. H. HeinsiusC. H. HeinzY. K. HengC. HeroldM. HimmelreichT. HoltmannG. Y. HouY. R. HouZ. L. HouH. M. HuJ. F. HuT. HuY. HuG. S. HuangL. Q. HuangX. T. HuangY. P. HuangZ. HuangT. HussainN HüskenW. Ikegami AnderssonW. ImoehlM. IrshadS. JaegerS. JanchivQ. JiQ. P. JiX. B. JiX. L. JiY. Y. JiH. B. JiangX. S. JiangJ. B. JiaoZ. JiaoS. JinY. JinM. Q. JingT. JohanssonN. Kalantar-nayestanakiX. S. KangR. KappertM. KavatsyukB. C. KeI. K. KeshkA. KhoukazP. KieseR. KiuchiR. KliemtL. KochO. B. KolcuB. KopfM. KuemmelM. KuessnerA. KupscM. G. KurthW. KühnJ. J. LaneJ. S. LangeP. LarinA. LavaniaL. LavezziZ. H. LeiH. LeithoffM. LellmannT. LenzC. LiC. H. LiCheng LiD. M. LiF. LiG. LiH. LiH. LiH. B. LiH. J. LiJ. L. LiJ. Q. LiJ. S. LiKe LiL. K. LiLei LiP. R. LiS. Y. LiW. D. LiW. G. LiX. H. LiX. L. LiXiaoyu LiZ. Y. LiH. LiangH. LiangH. LiangY. F. LiangY. T. LiangG. R. LiaoL. Z. LiaoJ. LibbyC. X. LinB. J. LiuC. X. LiuD. LiuF. H. LiuFang LiuFeng LiuH. B. LiuH. M. LiuHuanhuan LiuHuihui LiuJ. B. LiuJ. L. LiuJ. Y. LiuK. LiuK. Y. LiuKe LiuL. LiuM. H. LiuP. L. LiuQ. LiuQ. LiuS. B. LiuShuai LiuT. LiuW. M. LiuX. LiuY. LiuY. B. LiuZ. A. LiuZ. Q. LiuX. C. LouF. X. LuH. J. LuJ. D. LuJ. G. LuX. L. LuY. LuY. P. LuC. L. LuoM. X. LuoP. W. LuoT. LuoX. L. LuoX. R. LyuF. C. MaH. L. MaL. L. MaM. M. MaQ. M. MaR. Q. MaR. T. MaX. X. MaX. Y. MaF. E. MaasM. MaggioraS. MaldanerS. MaldeQ. A. MalikA. MangoniY. J. MaoZ. P. MaoS. MarcelloZ. X. MengJ. G. MesschendorpG. MezzadriT. J. MinR. E. MitchellX. H. MoN. Yu. MuchnoiH. MuramatsuS. NakhoulY. NefedovF. NerlingI. B. NikolaevZ. NingS. NisarS. L. OlsenQ. OuyangS. PacettiX. PanY. PanA. PathakA. PathakP. PatteriM. PelizaeusH. P. PengK. PetersJ. PetterssonJ. L. PingR. G. PingS. PogodinR. PolingV. PrasadH. QiH. R. QiK. H. QiM. QiT. Y. QiS. QianW. B. QianZ. QianC. F. QiaoL. Q. QinX. P. QinX. S. QinZ. H. QinJ. F. QiuS. Q. QuK. H. RashidK. RavindranC. F. RedmerA. RivettiV. RodinM. RoloG. RongCh. RosnerM. RumpH. S. SangA. SarantsevY. SchelhaasC. SchnierK. SchoenningM. ScodeggioD. C. ShanW. ShanX. Y. ShanJ. F. ShangguanM. ShaoC. P. ShenH. F. ShenP. X. ShenX. Y. ShenH. C. ShiR. S. ShiX. ShiX. D ShiJ. J. SongW. M. SongY. X. SongS. SosioS. SpataroK. X. SuP. P. SuF. F. SuiG. X. SunH. K. SunJ. F. SunL. SunS. S. SunT. SunW. Y. SunW. Y. SunX SunY. J. SunY. K. SunY. Z. SunZ. T. SunY. H. TanY. X. TanC. J. TangG. Y. TangJ. TangJ. X. TengV. ThorenW. H. TianY. T. TianI. UmanB. WangC. W. WangD. Y. WangH. J. WangH. P. WangK. WangL. L. WangM. WangM. Z. WangMeng WangW. WangW. H. WangW. P. WangX. WangX. F. WangX. L. WangY. WangY. WangY. D. WangY. F. WangY. Q. WangY. Y. WangZ. WangZ. Y. WangZiyi WangZongyuan WangD. H. WeiF. WeidnerS. P. WenD. J. WhiteU. WiednerG. WilkinsonM. WolkeL. WollenbergJ. F. WuL. H. WuL. J. WuX. WuZ. WuL. XiaH. XiaoS. Y. XiaoZ. J. XiaoX. H. XieY. G. XieY. H. XieT. Y. XingC. J. XuG. F. XuQ. J. XuW. XuX. P. XuY. C. XuF. YanL. YanW. B. YanW. C. YanXu YanH. J. YangH. X. YangL. YangS. L. YangY. X. YangYifan YangZhi YangM. YeM. H. YeJ. H. YinZ. Y. YouB. X. YuC. X. YuG. YuJ. S. YuT. YuC. Z. YuanL. YuanX. Q. YuanY. YuanZ. Y. YuanC. X. YueA. A. ZafarX. Zeng ZengY. ZengA. Q. ZhangB. X. ZhangGuangyi ZhangH. ZhangH. H. ZhangH. H. ZhangH. Y. ZhangJ. L. ZhangJ. Q. ZhangJ. W. ZhangJ. Y. ZhangJ. Z. ZhangJianyu ZhangJiawei ZhangL. M. ZhangL. Q. ZhangLei ZhangS. ZhangS. F. ZhangShulei ZhangX. D. ZhangX. Y. ZhangY. ZhangY. T. ZhangY. H. ZhangYan ZhangYao ZhangZ. Y. ZhangG. ZhaoJ. ZhaoJ. Y. ZhaoJ. Z. ZhaoLei ZhaoLing ZhaoM. G. ZhaoQ. ZhaoS. J. ZhaoY. B. ZhaoY. X. ZhaoZ. G. ZhaoA. ZhemchugovB. ZhengJ. P. ZhengY. H. ZhengB. ZhongC. ZhongL. P. ZhouQ. ZhouX. ZhouX. K. ZhouX. R. ZhouX. Y. ZhouA. N. ZhuJ. ZhuK. ZhuK. J. ZhuS. H. ZhuT. J. ZhuW. J. ZhuW. J. ZhuY. C. ZhuZ. A. ZhuB. S. ZouJ. H. Zou

subject

High Energy Physics - Experiment (hep-ex)FOS: Physical sciencesHigh Energy Physics::Experiment

description

Using a data sample corresponding to an integrated luminosity of 2.93 fb$^{-1}$ collected at a center-of-mass energy $\sqrt{s}=3.773$ GeV by the BESIII detector, the decay $D^0 \toωϕ$ is observed for the first time. The branching fraction is measured to be $(6.48 \pm 0.96 \pm 0.40)\times 10^{-4}$ with a significance of $6.3 σ$, where the first and second uncertainties are statistical and systematic, respectively. An angular analysis reveals that the $ϕ$ and $ω$ mesons from the $D^0 \to ωϕ$ decay are transversely polarized. The $95\%$ confidence level upper limit on longitudinal polarization fraction is set to be less than $0.24$, which is inconsistent with current theoretical expectations and challenges our understanding of the underlying dynamics in charm meson decays.

https://dx.doi.org/10.48550/arxiv.2108.02405