Photoproduction of ${K}^{+}{K}^{\ensuremath{-}}$ meson pairs on the proton

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Photoproduction of $K^{+} K^{-}$ meson pairs on the proton

S. Lombardo et al. (The CLAS Collaboration)

Phys. Rev. D 98, 052009 – Published 27 September 2018

Abstract

The exclusive reaction $γ p \to p K^{+} K^{-}$ was studied in the photon energy range $3.0 - 3.8 GeV$ and momentum transfer range $0.6 < - t < 1.3 {GeV}^{2}$ . 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 $d σ / d t$ 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.

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Received 7 August 2018

DOI:https://doi.org/10.1103/PhysRevD.98.052009

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.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Hadronic decays Particle & resonance production Particle interactions Photon, lepton & quark production Quantum chromodynamics Quark model Scattering amplitudes Strong interaction

Nuclear PhysicsParticles & Fields

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Vol. 98, Iss. 5 — 1 September 2018

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Physical Review D

covering particles, fields, gravitation, and cosmology

Photoproduction of $K^{+} K^{-}$ meson pairs on the proton

S. Lombardo et al. (The CLAS Collaboration)

Phys. Rev. D 98, 052009 – Published 27 September 2018

Abstract

Physics Subject Headings (PhySH)

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Article Text

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Issue

Physical Review D

covering particles, fields, gravitation, and cosmology

Photoproduction of K+K− meson pairs on the proton

S. Lombardo et al. (The CLAS Collaboration)

Phys. Rev. D 98, 052009 – Published 27 September 2018

Abstract

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Photoproduction of $K^{+} K^{-}$ meson pairs on the proton