Observation of e(+) e(-) -> gamma chi(c1) and search for e(+) e(-) -> gamma chi(c0), gamma chi(c2), and gamma eta(c) at root s near 10.6 GeV at Belle

Jia, S.Wang, X. L.Shen, C. P.Yuan, C. Z.Adachi, I.Aihara, H.Al Said, S.Asner, D. M.Atmacan, H.Aulchenko, V.Aushev, T.Ayad, R.Babu, V.Bansal, V.Behera, P.Beleno, C.Berger, M.Bhuyan, B.Bilka, T.Biswal, J.Bobrov, A.Bozek, A.Bracko, M.Browder, T. E.Cao, L.Cervenkov, D.Chang, P.Chekelian, V.Chen, A.Cheon, B. G.Chilikin, K.Cho, K.Choi, S. -K.Choi, Y.Choudhury, S.Cinabro, D.Cunliffe, S.Dash, N.Di Carlo, S.Dolezal, Z.Dong, T. V.Eidelman, S.Epifanov, D.Fast, J. E.Ferber, T.Frey, A.Fulsom, B. G.Garg, R.Gaur, V.Gabyshev, N.Garmash, A.Gelb, M.Giri, A.Goldenzweig, P.Greenwald, D.Haba, J.Hayasaka, K.Hayashii, H.Hou, W. -S.Hsu, C. -L.Iijima, T.Inami, K.Inguglia, G.Ishikawa, A.Itoh, R.Iwasaki, M.Iwasaki, Y.Jacobs, W. W.Jin, Y.Joffe, D.Kahn, J.Kaliyar, A. B.Karyan, G.Kawasaki, T.Kichimi, H.Kiesling, C.Kim, D. Y.Kim, H. J.Kim, J. B.Kim, S. H.Kinoshita, K.Kodys, P.Korpar, S.Kotchetkov, D.Krizan, P.Kroeger, R.Krokovny, P.Kuhr, T.Kulasiri, R.Kumar, R.Kuzmin, A.Kwon, Y. -J.Lalwani, K.Lange, J. S.Lee, I. S.Lee, J. Y.Lee, S. C.Li, C. H.Li, L. K.Li, Y. B.Gioi, L. LiLibby, J.Liptak, Z.Liventsev, D.Lu, P. -C.Lubej, M.MacNaughton, J.Masuda, M.Matsuda, T.Matvienko, D.Merola, M.Miyata, H.Mizuk, R.Mori, T.Mussa, R.Nakano, E.Nakao, M.Nath, K. J.Nayak, M.Nisar, N. K.Nishida, S.Ogawa, S.Olsen, S. L.Ono, H.Onuki, Y.Ostrowicz, W.Pakhlova, G.Pal, B.Pardi, S.Paul, S.Pedlar, T. K.Pestotnik, R.Piilonen, L. E.Popov, V.Prencipe, E.Ritter, M.Rostomyan, A.Russo, G.Sakai, Y.Salehi, M.Sandilya, S.Santelj, L.Sanuki, T.Savinov, V.Schneider, O.Schnell, G.Schueler, J.Schwanda, C.Seino, Y.Senyo, K.Sevior, M. E.Shibata, T. -A.Shiu, J. -G.Simon, F.Sokolov, A.Solovieva, E.Staric, M.Stottler, Z. S.Strube, J. F.Sumiyoshi, T.Sutcliffe, W.Takizawa, M.Tanida, K.Tao, Y.Tenchini, F.Uchida, M.Uehara, S.Uglov, T.Unno, Y.Uno, S.Urquijo, P.Usov, Y.Van Tonder, R.Varner, G.Varvell, K. E.Vorobyev, V.Waheed, E.Wang, B.Wang, C. H.Wang, M. -Z.Wang, P.Watanuki, S.Widmann, E.Won, E.Yamamoto, H.Yang, S. B.Ye, H.Yin, J. H.Yusa, Y.Zhang, Z. P.Zhilich, V.Zhukova, V.Zhulanov, V.2018-12-192018-12-192018-12-192018-11-3010.1103/PhysRevD.98.092015https://infoscience.epfl.ch/handle/20.500.14299/153101WOS:000451994500001Using data samples of 89.5 fb(-1), 711.0 fb(-1), and 121.4 fb(-1) collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider at center-of-mass energies 10.52, 10.58, and 10.867 GeV, respectively, we study the exclusive reactions e(+)e(-) -> gamma chi(cJ) (J = 0, 1, 2) and e(+)e(-) -> gamma chi(c). A significant gamma chi(c1) signal is observed for the first time at root s = 10.58 GeV with a significance of 5.1 sigma including systematic uncertainties. No significant excesses for gamma chi(c0), gamma chi(c2), and gamma chi(c) final states are found, and we set 90% credibility level upper limits on the Born cross sections (sigma(B)) at 10.52 GeV, 10.58 GeV, and 10.867 GeV. Together with cross sections measured by BESIII at lower center-of-mass energies, the energy dependency of sigma(B) (e(+)e(-) -> gamma chi(c1)) thorn is obtained.Astronomy & AstrophysicsPhysics, Particles & FieldsAstronomy & AstrophysicsPhysicsObservation of e(+) e(-) -> gamma chi(c1) and search for e(+) e(-) -> gamma chi(c0), gamma chi(c2), and gamma eta(c) at root s near 10.6 GeV at Belletext::journal::journal article::research article