Cross Sections for the Reactions e+e- --> K+ K- pi+pi-, K+ K- pi0pi0, and K+ K- K+ K- Measured Using Initial-State Radiation

Abstract : We study the processes e+e- --> K+ K- pi+pi-gamma, K+ K- pi0pi0gamma, and K+ K- K+ K-gamma, where the photon is radiated from the initial state. About 84000, 8000, and 4200 fully reconstructed events, respectively, are selected from 454 fb-1 of BaBar data. The invariant mass of the hadronic final state defines the \epem center-of-mass energy, so that the K+ K- pi+pi- data can be compared with direct measurements of the e+e- --> K+ K- pi+pi- reaction. No direct measurements exist for the e+e- --> K+ K-pi0pi0 or e+e- --> K+ K-K+ K- reactions, and we present an update of our previous result with doubled statistics. Studying the structure of these events, we find contributions from a number of intermediate states, and extract their cross sections. In particular, we perform a more detailed study of the e+e- --> phi(1020)pipigamma reaction, and confirm the presence of the Y(2175) resonance in the phi(1020) f0(980) and K+K-f0(980) modes. In the charmonium region, we observe the J/psi in all three final states and in several intermediate states, as well as the psi(2S) in some modes, and measure the corresponding branching fractions.
Document type :
Journal articles
Complete list of metadatas

http://hal.in2p3.fr/in2p3-00580608
Contributor : Claudine Bombar <>
Submitted on : Monday, March 28, 2011 - 4:50:32 PM
Last modification on : Tuesday, May 14, 2019 - 10:45:51 AM

Links full text

Identifiers

Citation

J.P. Lees, V. Poireau, E. Prencipe, V. Tisserand, D. Bernard, et al.. Cross Sections for the Reactions e+e- --> K+ K- pi+pi-, K+ K- pi0pi0, and K+ K- K+ K- Measured Using Initial-State Radiation. Physical Review D, American Physical Society, 2012, 86, pp.012008. ⟨10.1103/PhysRevD.86.012008⟩. ⟨in2p3-00580608⟩

Share

Metrics

Record views

142