We study the processes γγ→K+K-η and γγ→K+K-π0 using a data sample of 519fb-1 recorded with the BABAR detector operating at the SLAC PEP-II asymmetric-energy e+e- collider at center-of-mass energies at and near the (nS) (n=2,3,4) resonances. We observe ηc→K+K-π0 and ηc→K+K-η decays, measure their relative branching fraction, and perform a Dalitz plot analysis for each decay. We observe the K0*(1430)→Kη decay and measure its branching fraction relative to the Kπ decay mode to be R(K0*(1430))=B(K0*(1430) →Kη)B(K0*(1430)→Kπ)=0.092±0.025-0.025+0.010. The ηc→K+K-η and K0*(1430)→Kη results correspond to the first observations of these channels. The data also show evidence for ηc(2S)→K+K-π0 and first evidence for ηc(2S)→K+K-η.

Lees, J., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2014). Dalitz plot analysis of ηc →k+K-η and ηc →k+K-π0 in two-photon interactions. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 89(11) [10.1103/PhysRevD.89.112004].

Dalitz plot analysis of ηc →k+K-η and ηc →k+K-π0 in two-photon interactions

Martinelli M.;CARPINELLI, Massimo;
2014

Abstract

We study the processes γγ→K+K-η and γγ→K+K-π0 using a data sample of 519fb-1 recorded with the BABAR detector operating at the SLAC PEP-II asymmetric-energy e+e- collider at center-of-mass energies at and near the (nS) (n=2,3,4) resonances. We observe ηc→K+K-π0 and ηc→K+K-η decays, measure their relative branching fraction, and perform a Dalitz plot analysis for each decay. We observe the K0*(1430)→Kη decay and measure its branching fraction relative to the Kπ decay mode to be R(K0*(1430))=B(K0*(1430) →Kη)B(K0*(1430)→Kπ)=0.092±0.025-0.025+0.010. The ηc→K+K-η and K0*(1430)→Kη results correspond to the first observations of these channels. The data also show evidence for ηc(2S)→K+K-π0 and first evidence for ηc(2S)→K+K-η.
Articolo in rivista - Articolo scientifico
Astronomy; Astrophysics; Physics;
English
2014
89
11
112004
none
Lees, J., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2014). Dalitz plot analysis of ηc →k+K-η and ηc →k+K-π0 in two-photon interactions. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 89(11) [10.1103/PhysRevD.89.112004].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/389174
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