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

Journal Article · Tue Dec 15 00:00:00 EST 2015 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/S1063778815090070· OSTI ID:22471984

Donskov, S. V.; Kolosov, V. N.; Lednev, A. A.; Mikhailov, Yu. V.; Polyakov, V. A.; Samoylenko, V. D.; Khaustov, G. V. ^[1]

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1. National Research Center Kurchatov Institute, Institute for High Energy Physics (Russian Federation)

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)

• OSTI ID: 22471984
• Journal Information: Physics of Atomic Nuclei, Vol. 78, Issue 9; Other Information: Copyright (c) 2015 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7788
• Country of Publication: United States
• Language: English

Related Subjects

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