Observation of a resonancelike structure in the pi +- psi' mass distribution in exclusive B-->Kpi +- psi' decays.
A distinct peak is observed in the pi +/- psi' invariant mass distribution near 4.43 GeV in B-->K pi +/- psi' decays. A fit using a Breit-Wigner resonance shape yields a peak mass and width of M=4433+/-4(stat)+/-2(syst) MeV and Gamma=45-13+18(stat)-13+30(syst) MeV. The product branching fraction is determined to be B(B 0-->K -/+Z+/-(4430)) x B(Z+/-(4430)-->pi+/-psi')=(4.1+/-1.0(stat)+/-1.4(syst)) x 10(-5), where Z+/-(4430) is used to denote the observed structure. The statistical significance of the observed peak is 6.5 sigma. These results are obtained from a 605 fb(-1) data sample that contains 657 x 10(6) BB pairs collected near the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric energy e+ e- collider.
Choi
S-K
SK
Gyeongsang National University, Chinju.
Olsen
S L
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Adachi
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Aihara
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Aulchenko
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Aziz
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Bakich
A M
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Bozek
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Bracko
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Brodzicka
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Browder
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Chang
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Chao
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Chen
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Chen
K-F
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Chen
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Cheon
B G
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Chistov
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Choi
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Dalseno
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Danilov
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Dash
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Eidelman
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Gabyshev
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Golob
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Haba
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Hara
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Hayasaka
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Hayashii
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Hazumi
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Heffernan
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Hoshi
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Hou
W-S
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Hyun
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Iijima
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Inami
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Ishikawa
A
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Ishino
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Itoh
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Iwasaki
M
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Iwasaki
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Kah
D H
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Kang
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Katayama
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Kawai
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Kawasaki
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Kichimi
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Kim
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Kim
S K
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Kim
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Kinoshita
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Krizan
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Krokovny
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Kumar
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Kuo
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Kuzmin
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Kwon
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Lange
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Lee
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Lee
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Lee
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Lesiak
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Limosani
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Lin
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Liu
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Liventsev
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Mandl
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Matyja
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McOnie
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Medvedeva
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Mitaroff
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Miyabayashi
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Miyake
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Miyata
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Miyazaki
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Mizuk
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Moloney
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Nakano
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Nakao
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Nishida
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Nitoh
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Nozaki
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Ogawa
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Ohshima
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Okuno
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Ozaki
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Pakhlov
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Pakhlova
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Park
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Park
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Peak
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Pestotnik
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Piilonen
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Sahoo
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Sakai
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Schneider
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Schwartz
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Senyo
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Shapkin
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Shen
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Shwartz
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Singh
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Somov
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Stanic
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Staric
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Sumiyoshi
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Suzuki
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Takasaki
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Tamai
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Tanaka
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Teramoto
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Tikhomirov
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Uehara
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Uglov
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Unno
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Uno
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Urquijo
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Varner
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Vervink
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Villa
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Wang
C H
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Wang
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Wang
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Watanabe
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Wedd
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Won
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Yabsley
B D
BD
Yamashita
Y
Y
Yuan
C Z
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Zhang
Z P
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Zhulanov
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Zupanc
A
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Zyukova
O
O