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Cross sections for the reactions e +e -→K +K -π +π -, K +K -π0π0, and K +K -K +K - measured using initial-state radiation events

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BaBar Collaboration (Including: Gershon, T. J., Harrison, P. F., Latham, Thomas and Puccio, E. M. T.). (2012) Cross sections for the reactions e +e -→K +K -π +π -, K +K -π0π0, and K +K -K +K - measured using initial-state radiation events. Physical Review D (Particles, Fields, Gravitation and Cosmology), Volume 86 (Issue 1). Article number 012008. doi:10.1103/PhysRevD.86.012008 ISSN 1550-7998.

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Official URL: http://dx.doi.org/10.1103/PhysRevD.86.012008

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Abstract

We study the processes e +e -→K +K -π +π -γ, K +K -π0π0γ, and K +K -K +K -γ, where the photon is radiated from the initial state. About 84000, 8000, and 4200 fully reconstructed events, respectively, are selected from 454fb -1 of BABAR data. The invariant mass of the hadronic final state defines the e +e - center-of-mass energy, so that the K +K -π +π -γ data can be compared with direct measurements of the e +e -→K +K -π +π - reaction. No direct measurements exist for the e +e -→K +K -π0π0 or e +e -→K +K -K +K - reactions, and we present an update of our previous result based on a data sample that is twice as large. 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 -→φ(1020)ππγ reaction and confirm the presence of the Y(2175) resonance in the φ(1020)f 0(980) and K +K -f 0(980) modes. In the charmonium region, we observe the J/ψ in all three final states and in several intermediate states, as well as the ψ(2S) in some modes, and measure the corresponding products of branching fraction and electron width.

Item Type: Journal Article
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Journal or Publication Title: Physical Review D (Particles, Fields, Gravitation and Cosmology)
Publisher: American Physical Society
ISSN: 1550-7998
Official Date: 26 May 2012
Dates:
DateEvent
26 May 2012Published
Volume: Volume 86
Number: Issue 1
Page Range: Article number 012008
DOI: 10.1103/PhysRevD.86.012008
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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