Study of e+ e- → π+ π- J/ψ and observation of a charged charmoniumlike state at Belle.

Q Liu, Z; P Shen, C; Z Yuan, C; Adachi, I; Aihara, H; M Asner, D; Aulchenko, V; Aushev, T; Aziz, T; M Bakich, A; Bala, A; Belous, K; Bhardwaj, V; Bhuyan, B; Bischofberger, M; Bondar, A; Bonvicini, G; Bozek, A; Bračko, M; Brodzicka, J; E Browder, T; Chang, P; Chekelian, V; Chen, A; Chen, P; G Cheon, B; Chistov, R; Cho, K; Chobanova, V; Choi, S-K; Choi, Y; Cinabro, D; Dalseno, J; Danilov, M; Doležal, Z; Drásal, Z; Drutskoy, A; Dutta, D; Dutta, K; Eidelman, S; Epifanov, D; Farhat, H; E Fast, J; Feindt, M; Ferber, T; Frey, A; Gaur, V; Gabyshev, N; Ganguly, S; Gillard, R

doi:10.1103/physrevlett.110.252002

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Study of e+ e- → π+ π- J/ψ and observation of a charged charmoniumlike state at Belle.

Published in Physical review letters • Jun 21, 2013

NobleIDark:/48914/w1/20260526/401BCCD7Record on NobleID

Authors:

Z Q Liu

,

C P Shen

,

C Z Yuan

Abstract

The cross section for ee+ e- → π+ π- J/ψ between 3.8 and 5.5 GeV is measured with a 967 fb(-1) data sample collected by the Belle detector at or near the Υ(nS) (n = 1,2,…,5) resonances. The Y(4260) state is observed, and its resonance parameters are determined. In addition, an excess of π+ π- J/ψ pr...

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