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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

Authors
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.
Issue Date
30-11월-2018
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW D, v.98, no.9
Indexed
SCIE
SCOPUS
Journal Title
PHYSICAL REVIEW D
Volume
98
Number
9
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/71491
DOI
10.1103/PhysRevD.98.092015
ISSN
2470-0010
Abstract
Using 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.
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