Publication: Experimental study of psi ' decays to K+K- pi(0) and K+K-eta
Date
Authors
Tapan, İlhan
Authors
Ablikim, M.
Achasov, Mikhail N.
Albayrak, Onur
Ambrose, D. J.
An, F. F.
An, Q.
Bai, J. Z.
Ban, Y.
Becker, J.
Bennett, J. V.
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Amer Physical
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Abstract
Using (106 +/- 4) x 10(6) psi ' events accumulated with the BESIII detector at the BEPCII e(+)e(-) collider, we present measurements of the branching fractions for psi' decays to K+K- pi(0) and K+K- eta. In these final states, the decay psi' -> K-2(*) (1430)(+) K- + 10(-5), is observed for the first time, and its branching fraction is measured to be (7.12 +/- 0: 62(stat)(-0.61)(+1.13) (syst)) x 10(-5), which indicates a violation of the helicity selection rule in psi' decays. The branching fractions of psi' -> K* (892)(+) K- + c.c., phi eta, and phi pi(0) are also measured. The measurements are used to test the QCD predictions on charmonium decays.
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Keywords
Astronomy & astrophysics, Physics
Citation
Ablikim, M. vd. (2012). "Experimental study of psi ' decays to K+K- pi(0) and K+K-eta". Physical Review D, 86(7).