Photoproduction of K+K- Pairs in Ultraperipheral Collisions

Summary, in English

K+K- pairs may be produced in photonuclear collisions, either from the decays of photoproduced φ(1020) mesons or directly as nonresonant K+K- pairs. Measurements of K+K- photoproduction probe the couplings between the φ(1020) and charged kaons with photons and nuclear targets. The kaon-proton scattering occurs at energies far above those available elsewhere. We present the first measurement of coherent photoproduction of K+K- pairs on lead ions in ultraperipheral collisions using the ALICE detector, including the first investigation of direct K+K- production. There is significant K+K- production at low transverse momentum, consistent with coherent photoproduction on lead targets. In the mass range 1.1

• Author: S. Acharya; S. Basu; P. Christiansen; J. Hansen; K.E. Iversen; O. Matonoha; R. Nepeivoda; A. Ohlson; D. Silvermyr; J. Staa; V. Vislavicius; N. Zurlo
• Department/s: Particle and nuclear physics
• Publishing year: 2024
• Language: English
• Publication/Series: Physical Review Letters
• Volume: 132
• Issue: 22
• Links: http://dx.doi.org/10.1103/PhysRevLett.132.222303
• Document type: Journal article
• Publisher: American Physical Society
• Topic: Subatomic Physics
• Keywords: Bosons; Hadrons; Mass spectrometry; Photons; Rutherford backscattering spectroscopy; gluconate potassium; lead; proton; Center-of-mass energies; Energy; Lead ions; Measurements of; Nonresonant; Nuclear targets; Photonuclear; Photoproductions; Proton scattering; Transverse momenta; article; controlled study; human; meson; photon; Germanium alloys
• Status: Published
• ISBN/ISSN/Other: ISSN: 0031-9007