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Observation of two resonancelike structures in the pi(+)chi(c1) mass distribution in exclusive (B)overbar(0)-> K-pi(+)chi(c1) decays

Authors
Mizuk, R.Chistov, R.Adachi, I.Aihara, H.Arinstein, K.Aulchenko, V.Aushev, T.Bakich, A. M.Balagura, V.Barberio, E.Bay, A.Bhardwaj, V.Bitenc, U.Bondar, A.Bozek, A.Bracko, M.Brodzicka, J.Browder, T. E.Chang, M. -C.Chang, P.Chen, A.Chen, K. -F.Cheon, B. G.Chiang, C. -C.Cho, I. -S.Choi, S. -K.Choi, Y.Dalseno, J.Danilov, M.Drutskoy, A.Eidelman, S.Epifanov, D.Goldenzweig, P.Golob, B.Ha, H.Haba, J.Hayasaka, K.Hayashii, H.Hazumi, M.Hoshi, Y.Hou, W. -S.Hsiung, Y. B.Hyun, H. J.Iijima, T.Inami, K.Ishikawa, A.Ishino, H.Itoh, R.Iwasaki, M.Iwasaki, Y.Kah, D. H.Kaji, H.Kang, J. H.Kawasaki, T.Kichimi, H.Kim, H. J.Kim, H. O.Kim, Y. I.Kim, Y. J.Kinoshita, K.Korpar, S.Krizan, P.Krokovny, P.Kumar, R.Kuzmin, A.Kwon, Y. -J.Kyeong, S. -H.Lange, J. S.Lee, J. S.Lee, M. J.Lin, S. -W.Liu, C.Liu, Y.Liventsev, D.Mandl, F.McOnie, S.Miyabayashi, K.Miyata, H.Miyazaki, Y.Nakano, E.Nakao, M.Nakazawa, H.Nishida, S.Nitoh, O.Ogawa, S.Ohshima, T.Okuno, S.Olsen, S. L.Ozaki, H.Pakhlov, P.Pakhlova, G.Palka, H.Park, C. W.Park, H.Park, H. K.Peak, L. S.Pestotnik, R.Piilonen, L. E.Poluektov, A.Sahoo, H.Sakai, Y.Schneider, O.Schwartz, A. J.Senyo, K.Shiu, J. -G.Shwartz, B.Singh, J. B.Sokolov, A.Somov, A.Stanic, S.Staric, M.Sumiyoshi, T.Tanaka, M.Taylor, G. N.Teramoto, Y.Tikhomirov, I.Trabelsi, K.Uehara, S.Uglov, T.Unno, Y.Uno, S.Urquijo, P.Usov, Y.Varner, G.Varvell, K. E.Vervink, K.Wang, C. H.Wang, M. -Z.Wang, P.Wang, X. L.Watanabe, Y.Wicht, J.Won, E.Yabsley, B. D.Yamashita, Y.Zhang, C. C.Zhang, Z. P.Zhilich, V.Zhulanov, V.Zivko, T.Zupanc, A.Zyukova, O.
Issue Date
10월-2008
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW D, v.78, no.7
Indexed
SCIE
SCOPUS
Journal Title
PHYSICAL REVIEW D
Volume
78
Number
7
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/122591
DOI
10.1103/PhysRevD.78.072004
ISSN
1550-7998
Abstract
We report the first observation of two resonancelike structures in the pi(+)chi(c1) invariant mass distribution near 4.1 GeV/c(2) in exclusive (B)overbar(0)-> K-pi(+)chi(c1) decays. From a Dalitz plot analysis in which the pi(+)chi(c1) mass structures are represented by Breit-Wigner resonance amplitudes, we determine masses and widths of: M-1=(4051 +/- 14(-41)(+20)) MeV/c(2), Gamma(1)=(82(-17-22)(+21+47)) MeV, M-2=(4248(-29-35)(+44+180)) MeV/c(2), and Gamma(2)=(177(-39-61)(+54+316)) MeV; and product branching fractions of B((B)overbar(0)-> K(-)Z(1,2)(+))xB(Z(1,2)(+)->pi(+)chi(c1))=(3.0(-0.8-1.6)(+1.5+3.7))x10(-5) and (4.0(-0.9-0.5)(+2.3+19.7))x10(-5), respectively. Here the first uncertainty is statistical, the second is systematic. The significance of each of the pi(+)chi(c1) structures exceeds 5 sigma, including the systematic uncertainty from various fit models. This analysis is based on 657x10(6) B(B)overbar events collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider.
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