Xu Q.N.Adachi I.Aihara H.Al Said S.Asner D.M.Atmacan H.Aulchenko V.Aushev T.Ayad R.Babu V.Badhrees I.Bakich A.M.Bansal V.Barberio E.Behera P.Berger M.Bhardwaj V.Bhuyan B.Biswal J.Bondar A.Bozek A.Bra?ko M.?ervenkov D.Chen A.Cheon B.G.Chilikin K.Cho K.Choi S.-K.Choi Y.Cinabro D.Cunliffe S.Czank T.Dash N.Di Carlo S.Dole�al Z.Dr�sal Z.Eidelman S.Epifanov D.Fast J.E.Ferber T.Fulsom B.G.Garg R.Gaur V.Gabyshev N.Garmash A.Gelb M.Goldenzweig P.Guan Y.Guido E.Haba J.Hayasaka K.Hayashii H.Hedges M.T.Hou W.-S.Inami K.Inguglia G.Ishikawa A.Itoh R.Iwasaki M.Iwasaki Y.Jaegle I.Jeon H.B.Jin Y.Joo K.K.Julius T.Kaliyar A.B.Kang K.H.Karyan G.Kawasaki T.Kichimi H.Kiesling C.Kim D.Y.Kim H.J.Kim J.B.Kody� P.Korpar S.Kotchetkov D.Kri�an P.Kroeger R.Krokovny P.Kulasiri R.Kwon Y.-J.Lee I.S.Lee S.C.Li L.K.Li Y.Li Gioi L.Libby J.Liventsev D.Lubej M.Luo T.Masuda M.Matsuda T.Matvienko D.Merola M.Miyabayashi K.Miyata H.Mizuk R.Moon H.K.Mori T.Mussa R.Nanut T.Nath K.J.Natkaniec Z.Nayak M.Nisar N.K.Nishida S.Okuno S.Ono H.Onuki Y.Pakhlov P.Pakhlova G.Pal B.Park H.Paul S.Pedlar T.K.Pestotnik R.Piilonen L.E.Popov V.Ritter M.Rostomyan A.Russo G.Sakai Y.Salehi M.Sandilya S.Sanuki T.Savinov V.Schneider O.Schnell G.Schwanda C.Seino Y.Senyo K.Seon O.Sevior M.E.Shebalin V.Shen C.P.Shibata T.-A.Shimizu N.Shiu J.-G.Sokolov A.Solovieva E.Stari? M.Strube J.F.Sumiyoshi T.Takizawa M.Tamponi U.Tanida K.Tenchini F.Uchida M.Uehara S.Uglov T.Unno Y.Uno S.Urquijo P.Van Hulse C.Varner G.Vinokurova A.Vorobyev V.Vossen A.Wang B.Wang C.H.Wang M.-Z.Wang P.Wang X.L.Watanabe M.Watanabe Y.Widmann E.Won E.Ye H.Yuan C.Z.Yusa Y.Zakharov S.Zhang C.C.Zhang Z.P.Zhilich V.Zhukova V.Zhulanov V.Zupanc A.LHCb Collaboration2025-02-1720181http://dx.doi.org/10.1103/PhysRevD.98.072001https://idr.iitbbs.ac.in/handle/2008/1717We report the measurement of ????c(1S),?c(2S)????+?- with ?? decays to ?? and ??+?- using 941 fb-1 of data collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. The ?c(1S) mass and width are measured to be M=[2984.6�0.7 (stat)�2.2 (syst)�0.3 (model)] MeV/c2 and ?=[30.8-2.2+2.3 (stat)�2.5 (syst)�1.4 (model)] MeV, respectively. First observation of ?c(2S)????+?- with a significance of 5.5? including systematic error is obtained, and the ?c(2S) mass is measured to be M=[3635.1�3.7 (stat)�2.9 (syst)�0.4 (model)] MeV/c2. The products of the two-photon decay width and branching fraction (B) of decays to ???+?- are determined to be ??????B=[65.4�2.6 (stat)�7.8 (syst)] eV for ?c(1S) and [5.6-1.1+1.2 (stat)�1.1 (syst)] eV for ?c(2S). The cross sections for ??????+?- and ??f2(1270) are measured for the first time. � 2018 authors. Published by the American Physical Society.enArticle