Observation of a narrow charmonium - like state in exclusive B+- ---> K+- pi+ pi- J / psi decays

PAO-TI CHANGKAI-FENG CHEN2018-09-102018-09-102003-09http://inspirehep.net/record/627760http://scholars.lib.ntu.edu.tw/handle/123456789/302796Observation of a narrow charmonium - like state in exclusive B+- ---> K+- pi+ pi- J / psi decaysjournal article10.1103/PhysRevLett.91.262001