6533b853fe1ef96bd12ac993

RESEARCH PRODUCT

Observation of the Decay X(3872)→π0χc1(1P)

S. J. ZhaoL. J. WuX. L. JiY. J. MoX. N. MaR. KliemtP. L. WangMuhammad IrshadX. S. KangB. WangA. MangoniA. GuskovJie YuM. KavatsyukQ. J. XuXiang-gan LiuY. H. ZhengCong-feng QiaoJ. C. ChenXuanhong LouB. X. ZhangX. TangY. G. XieViktor ThorénK. J. ZhuKrisztian PetersN. Yu. MuchnoiNasser Kalantar-nayestanakiY. BanP. WeidenkaffF. H. HeinsiusLi ZhouS. X. DuG. CibinettoA. YuncuM. RoloF. A. HarrisQ. P. JiY. H. ZhangC. Morales MoralesT. KhanD. Y. LiuJ. B. JiaoZ. L. DouS. P. WenX. R. ZhouP. W. LuoS. L. YangW. L. ChangLiqing XuX. Y. ShenG. Y. TangY. F. WangCheng LiH. LeithoffG. R. LiaoF. FeldbauerZ. Y. WangJie ZhaoD. X. LinAlexey ZhemchugovH. M. HuFeng LiuF. CossioK. J. ZhuL. K. LiM. AblikimY. DingM. H. YeF. LiF. C. MaXiaozhong HuangXiao-rui LyuA. CalcaterraZ. G. ZhaoT. HussainX. Y. MaXujin YuanW. ImoehlX. L. GaoW. X. GongX. B. JiB. J. LiuS. B. LiuF. De MoriT. Y. XingD. Y. ChenL. Z. LiaoM. RichterZ. NingS. Y. XiaoL. ZhangY. NefedovY. G. GaoJ. L. ZhangH. H. ZhangAndrzej KupscC. DongS. SosioP. PatteriM. KuemmelMatthew Glenn KurthL. Y. DongA. Q. GuoW. ShanT. LiuJ. F. QiuL. FavaZ. J. SunF. F. SuiM. H. GuR. KiuchiS. MaldanerY. H. XieH. Y. ShengM. Y. DongShan JinJun-yi ZhangM. G. ZhaoY. H. YangY. P. GuoM. AlekseevI. UmanS. NakhoulX. F. CuiJ. BlomsMeng WangZ. X. MengX. A. XiongK. GoetzenL. KochS. AhmedY. X. YangJ. C. LiA. KhoukazJoachim PetterssonX. WangM. FritschX. H. SunF. NerlingW. KühnZ. Y. YouZ. A. ZhuX. LiuQ. Q. SongX. X. MaR. P. GuoJ. ZhuYang ZhangCui LiP. LarinJ. ZhuangZ. G. WangH. Y. ZhangHaiwen LiuM. L. ChenJianhao ZhangZ. P. ZhangJ. MinM. X. LuoC. X. YuKe LiuT. WeberG. F. ChenSerkant Ali CetinA. A. ZafarQ. A. MalikG. MezzadriH. J. LuJ. G. LuD. V. DedovichXu ZhouJ. Y. ZhangL. M. GuC. P. ShenM. MaggioraLing ZhaoYunlong ZhangR. Baldini FerroliH. B. LiuH. J. LiX. F. WangZujian WangL. P. ZhouP. R. LiD. BettoniY. M. MaF. E. MaasS. QianQ. AnJialun PingMichael PapenbrockF. YanX. H. MoL. S. WangZ. P. MaoH. B. LiJ. FangY. BaiW. J. ZhuR. PolingP. KieseM. H. YeH. L. JiangYuan HouK. ZhangX. D. ShiQ. M. MaLei ZhaoZ. L. HouK. H. RashidR. KappertR. A. BriereA. G. DenigC. L. LuoJianping ZhengZ. GaoT. Y. QiX. Y. ZhangT. HuH. W. WenQ. ZhouB. ZhengR. G. PingCh. RosnerC. C. ZhangB. ZhongL. B. GuoL. L. WangA. MustafaB. KopfJ. B. LiuJ. LibbyQ. ZhaoH. CaiY. Z. SunJ. H. ZouY. X. XiaS. H. ZhuBingxuan LiuY. J. SunYifan YangO. BakinaJ. F. SunW. S. ChengYao ZhangG. LiH. MuramatsuA. N. ZhuUlrich WiednerTao ZhangYaquan FangG. F. XuT. J. MinY. T. LiangX. S. JiangY. P. LuA. PitkaY. YuanY. S. ZhuYu ZhangI. B. NikolaevX. K. ZhouR. X. YangJ. H. YinZ. J. XiaoS. GuM. DestefanisA. GilmanXu ShanM. ShaoY. T. GuS. J. ChenS. MarcelloY. ZengY. J. LinQ. LiuP. X. ShenX. Y. JiangK. L. HeY. K. HengXiang ZhouI. K. KeshkZ. WuC. X. LinC. D. FuC. Q. FengZhe SunS. LussoZ. Y. DengS. S. SunM. M. MaK. SchoenningQ. Y. LiY. GaoB. S. ZouC. Z. YuanN. CaoH. H. WangWei XuM. Z. WangX D ShiNiklaus BergerL. L. MaL. GongA. AmorosoXingguo LiA. SarantsevMatthew Glenn KurthD. H. WeiJ. S. LangeZhiqing ZhangX. S. QinZhiqing LiuX. Y. SongY. B. ChenM. RumpGang ZhaoXiaofeng ZhuJ. Z. ZhangM. Z. WangY. J. MaoH. X. YangJ. F. HuJ. Q. ZhangJimin ZhaoA. DbeyssiJ. J. SongL. SunI. GarziaP. L. LiS. L. NiuT. JohanssonJ. F. ChangZhiyong ZhangF. Y. LiC. F. RedmerAngelo RivettiX. Q. LiY. F. LongZ. Q. YangM. GrecoY. PanGuangshun HuangL. YanJ. ChaiMagnus WolkeY. F. WangM. KuessnerY. F. LiangJ. D. LuX. P. QinG. X. SunJ. V. BennettB. GarillonX. T. HuangO. B. KolcuD. P. JinX. CaiHuihui LiuR. FarinelliZ. JiaoFu-hu LiuL. LavezziK. Y. LiuG. A. ChelkovR. E. MitchellS. Q. QuStephen Lars OlsenH. L. MaX. N. LiZ. B. LiW. Ikegami AnderssonT. LenzJ. S. HuangD. H. ZhangX. Q. HaoN. QinV. PrasadS. HanJ. G. MesschendorpM. BertaniJ. P. DaiC. X. LiuC. SowaY. B. ZhaoL. H. WuHaiping PengJ. DongM. SavrieD. M. LiL. YangYi JinJ. W. LiL. XiaTao LuoM. PelizaeusFang LiuR. M. WangY. J. XiaoC. W. WangG. RongS. NisarC. J. TangY. HuI. DenysenkoY. P. LuJ. Y. LiuW. C. YanS. F. ZhangZ. A. LiuB. X. YuY. T. TanW. GradlY. H. ZhengW. P. WangZ. H. QinW. G. LiY. K. SunXiaoyu ZhouB. Y. ZhangJ. J. XuQ. P. JiS. SpataroX. P. XuQ. GaoH. S. ChenM. RipkaD. Y. WangM. QiH. J. YangLei LiJ. Z. FanBibo KeW. B. YanM. N. AchasovS. PacettiG. F. CaoN. HueskenY. ZhangH. L. DaiIgor BoykoKe LiKe WangFenfen AnB. L. WangT. C. ZhaoM. AlbrechtW. D. LiB. T. TsedneeHuanhuan LiuY. FuG. FeliciY. H. YanJ. W. ZhaoY. C. ZhuX. H. LiT. HeldQ. L. XiuXingchao DaiP. L. WangHao LiangX. L. LuoK. BegzsurenF. BianchiD. Y. LiuZongyuan WangQ. OuyangS. S. FangY. B. Liu

subject

PhysicsElectron–positron annihilation0103 physical sciencesAnalytical chemistryPiGeneral Physics and Astronomy010306 general physics01 natural sciencesX(3872)

description

Using a total of 9.0 fb(-1) of e(+)e(-) collision data with center-of-mass energies between 4.15 and 4.30 GeV collected by the BESIII detector, we search for the processes e(+)e(-) gamma X(3872) with X(3872) -> pi(0)chi(cJ) for J = 0, 1, 2. We report the first observation of X(3872) -> pi(0)chi(c1), a new decay mode of the X(3872), with a statistical significance of more than 5 sigma for all systematic fit variations. Normalizing to the previously established process e(+)e(-) -> gamma X(3872) with X(3872) -> pi(+) pi(-) J/psi, we find B(X(3872) -> pi(0)chi(c1))/B(X(3872) -> pi+ pi(-) J/psi) = 0.88(-0.27)(+0.33) +/- 0.10, where the first error is statistical and the second is systematic. We set 90% confidence level upper limits on the corresponding ratios for the decays to pi(0)chi(c0) and pi(0)chi(c2) of 19 and 1.1, respectively.

https://doi.org/10.1103/physrevlett.122.202001