Search for the process \mathbf\it e⁺e^-→η^′γ in the energy range \it √(s) = 1.075 -- 2 GeV

2024/06/25 by М. Н. Ачасов, A. Barnyakov, Achasov, M. N. +70
Physics and Astronomy · Computer Science · #Particle physics theoretical and experimental studies #Computational Physics and Python Applications #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2406.17357

Abstract

The results of the search for the e⁺e^-→η^′γ process in the center-of-mass energy range from 1.075 to 2 GeV are presented. We analyze data with an integral luminosity of 746 pb^-1 accumulated with the SND detector at the e⁺e^- collider VEPP-2000 in 2010--2024. The η^′→ηπ⁰π⁰ decay is used in the analysis, with the subsequent η and π⁰ decays into γγ. Upper limits not exceeding 13 pb have been set on the e⁺e^-→η^′γ cross section at the 90% confidence level.

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