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Observation of Xi(1620)(0) and Evidence for Xi(1690)(0) in Xi(+)(c) -> Xi(-) pi(+) pi(+) Decays

Authors
Sumihama, M.Adachi, I.Ahn, J. K.Aihara, H.Al Said, S.Asner, D. M.Atmacan, H.Aushev, T.Ayad, R.Babu, V.Badhrees, I.Bahinipati, S.Bakich, A. M.Bansal, V.Beleno, C.Berger, M.Bhardwaj, V.Bhuyan, B.Bilka, T.Biswal, J.Bonvicini, G.Bozek, A.Bracko, M.Browder, T. E.Cervenkov, D.Chekelian, V.Chen, A.Cheon, B. G.Chilikin, K.Cho, K.Choi, S. -K.Choi, Y.Choudhury, S.Cinabro, D.Cunliffe, S.Czank, T.Dash, N.Di Carlo, S.Dolezal, Z.Dong, T. V.Drasal, Z.Eidelman, S.Epifanov, D.Fast, J. E.Fulsom, B. G.Garg, R.Gaur, V.Gabyshev, N.Garmash, A.Gelb, M.Giri, A.Goldenzweig, P.Guido, E.Haba, J.Hayasaka, K.Hayashii, H.Hirose, S.Hou, W. -S.Inami, K.Inguglia, G.Ishikawa, A.Itoh, R.Iwasaki, M.Iwasaki, Y.Jacobs, W. W.Jeon, H. B.Jia, S.Jin, Y.Joo, K. K.Julius, T.Kaliyar, A. B.Kang, K. H.Karyan, G.Kato, Y.Kiesling, C.Kim, D. Y.Kim, J. B.Kim, K. T.Kim, S. H.Kinoshita, K.Kodys, P.Korpar, S.Kotchetkov, D.Krizan, P.Kroeger, R.Krokovny, P.Kumar, R.Kuzmin, A.Kwon, Y. -J.Lange, J. S.Lee, I. S.Lee, S. C.Li, L. K.Li, Y. B.Gioi, L. LiLibby, J.Liventsev, D.Lubej, M.Luo, T.Masuda, M.Matsuda, T.Matvienko, D.Merola, M.Miyabayashi, K.Miyata, H.Mizuk, R.Mohanty, G. B.Moon, H. K.Mori, T.Mussa, R.Nakano, E.Nakano, T.Nakao, M.Nanut, T.Nath, K. J.Natkaniec, Z.Niiyama, M.Nisar, N. K.Nishida, S.Ono, H.Pakhlov, P.Pakhlova, G.Pal, B.Pardi, S.Park, H.Paul, S.Pedlar, T. K.Pestotnik, R.Piilonen, L. E.Popov, V.Ritter, M.Russo, G.Sahoo, D.Sandilya, S.Santelj, L.Sanuki, T.Savinov, V.Schneider, O.Schnell, G.Schwanda, C.Seino, Y.Senyo, K.Sevior, M. E.Shebalin, V.Shen, C. P.Shibata, T. -A.Shiu, J. -G.Shwartz, B.Simon, F.Sokolov, A.Solovieva, E.Staric, M.Strube, J. F.Sumiyoshi, T.Takizawa, M.Tamponi, U.Tanida, K.Taniguchi, N.Tenchini, F.Uchida, M.Uglov, T.Uno, S.Urquijo, P.Vahsen, S. E.Van Hulse, C.Varner, G.Vorobyev, V.Vossen, A.Wang, B.Wang, C. H.Wang, M. -Z.Wang, P.Wang, X. L.Watanabe, M.Watanuki, S.Widmann, E.Won, E.Ye, H.Yelton, J.Yuan, C. Z.Yusa, Y.Zakharov, S.Zhang, Z. P.Zhilich, V.Zhukova, V.Zhulanov, V.
Issue Date
Feb-2019
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v.122, no.7
Journal Title
PHYSICAL REVIEW LETTERS
Volume
122
Number
7
URI
http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/30713
DOI
10.1103/PhysRevLett.122.072501
ISSN
0031-9007
Abstract
We report the first observation of the double strange baryon Xi(1620)(0) in its decay to Xi(-) pi(+) via Xi(+)(c) -> Xi(-)pi(+)pi(+) decays based on a 980 fb(-1) data sample collected with the Belle detector at the KEKB asymmetricenergy e(+)e(-) collider. The mass and width are measured to be 1610.4 +/- 6.0(stat)(-4.2)(+6.1) (syst) MeV/c(2) and 59.9 +/- 4.8(stat)(-7.1)(+2.8)(syst) MeV, respectively. We obtain 4.0 sigma evidence of the Xi(1690)(0) with the same data sample. These results shed light on the structure of hyperon resonances with strangeness S = -2.
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