Skip to main content
Open Access Publications from the University of California

UC Berkeley

UC Berkeley Previously Published Works bannerUC Berkeley

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


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. © 2014 American Physical Society.

Many UC-authored scholarly publications are freely available on this site because of the UC's open access policies. Let us know how this access is important for you.

Main Content
For improved accessibility of PDF content, download the file to your device.
Current View