Observation of charged κ in J/ψ→K*(892)Kπ±, K*(892)→Kπ∓ at BESII

doi:10.1016/j.physletb.2011.03.011

Observation of charged κ in J/ψ→K^(892⁾Kπ^±, K^(892⁾→Kπ^∓ at BESII

BES Collaboration
Ablikim, M.
Bai, J. Z.
Bai, Y.
Ban, Y.
Cai, X.
Chen, H. F.
Chen, H. S.
Chen, J. C.
Chen, Jin
Chen, Y. B.
Chu, Y. P.
Dai, Y. S.
Deng, Z. Y.
Du, S. X.
Fang, J.
Fu, C. D.
Gao, Y. N.
Gu, Y. T.
Guo, Z. J.
Harris, F. A.
He, K. L.
He, M.
Heng, Y. K.
Hu, H. M.
Hu, T.
Huang, G. S.
Huang, X. T.
Ishida, M.
Ishida, S.
Huang, Y. P.
Ji, X. B.
Jiang, X. S.
Jiao, J. B.
Jin, D. P.
Jin, S.
Komada, T.
Kurokawa, S.
Li, G.
Li, H. B.
Li, J.
Li, L.
Li, R. Y.
Li, W. D.
Li, W. G.
Li, X. L.
Li, X. N.
Li, X. Q.
Liang, Y. F.
Liu, B. J.
and 97 more

Using 58 million J/ψ decays obtained by BESII, a charged κ particle is observed in the analysis of the Kπ^± system recoiling against K^*(892⁾ selected in J/ψ→KKπ⁺π^-. The mass and width values of the charged κ are obtained to be (826±49-34+49) MeV/c² and (449±156-81+144) MeV/c² for the Breit-Wigner parameters, and the pole position is determined to be (764±63-54+71)-i(306±149-85+143) MeV/c². They are in good agreement with those of the neutral κ observed by the BES Collaboration.

Publication:

Physics Letters B

Pub Date:

April 2011

DOI:

10.1016/j.physletb.2011.03.011

arXiv:

arXiv:1008.4489

Bibcode:

2011PhLB..698..183B

Keywords:

High Energy Physics - Experiment

E-Print:

15 pages, 9 figures

NASA/ADS