Photoproduction of K+ K− meson pairs on the proton.

Document Type

Article

Publication Date

2018

Abstract

The exclusive reaction γp→pK+K− was studied in the photon energy range 3.0–3.8  GeV and momentum transfer range 0.6<−t<1.3  GeV2. Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility. In this kinematic range the integrated luminosity was approximately 20  pb−1. The reaction was isolated by detecting the K+ and the proton in CLAS, and reconstructing the K− via the missing-mass technique. Moments of the dikaon decay angular distributions were extracted from the experimental data. Besides the dominant contribution of the ϕ meson in the P wave, evidence for S−P interference was found. The differential production cross sections dσ/dt for individual waves in the mass range of the ϕ resonance were extracted and compared to predictions of a Regge-inspired model. This is the first time the t-dependent cross section of the S-wave contribution to the elastic K+K− photoproduction has been measured.

Comments

Copyright 2018 American Physical Society

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

Publication Title

Physical Review D

Published Citation

Lombardo, S., M. Battaglieri, A. Celentano, A. D’Angelo, R. De Vita, A. Filippi, D. I. Glazier, Biselli, A. et al [CLAS Collaboration]. "Photoproduction of K+ K− meson pairs on the proton." Physical Review D 98, no. 5 (2018). DOI:https://doi.org/10.1103/PhysRevD.98.052009

DOI

10.1103/PhysRevD.98.052009

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