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Title: Searches for the decays η′→ π{sup 0}γγ and η′ → ηγγ at the GAMS-4π setup

Searches for the rare radiative decays η′→ π{sup 0}γγ and η′ → ηγγ were performed at the GAMS-4π setup. The following upper limits were set at a 90% confidence level: Br(η′→ π{sup 0}γγ) < 6 × 10{sup -4} and Br(η′→ ηγγ) < 8×10{sup -4}. The π{sup -}p charge-exchange reaction at the beammomentum of 32.5GeV/c was the source of 1.3 × 106 η′ mesons. The measurements in questions were performed at the U-70 accelerator of the Institute for High Energy Physics (Protvino, Russia)
Authors:
; ; ; ; ; ;  [1]
  1. National Research Center Kurchatov Institute, Institute for High Energy Physics (Russian Federation)
Publication Date:
OSTI Identifier:
22471984
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Atomic Nuclei; Journal Volume: 78; Journal Issue: 9; Other Information: Copyright (c) 2015 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BRANCHING RATIO; CHARGE-EXCHANGE REACTIONS; ETA MESONS; ETA PRIME-958 MESONS; MULTIPARTICLE SPECTROMETERS; PARTICLE DECAY; PARTICLE IDENTIFICATION; PARTICLE PRODUCTION; PHOTONS; PION-PROTON INTERACTIONS; PIONS MINUS; PIONS NEUTRAL; RADIATIVE DECAY; SERPUKHOV SYNCHROTRON