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Title: Measurement of neutral-meson masses in meson-nucleus interactions at a momentum of 7 GeV/c at the Hyperon-M setup

The {pi}{sup 0}, {eta}, K{sup 0}, {omega}, and f{sub 2}(1270) masses were measured at the HYPERON-Msetup in meson-nucleus interactions at a momentum of 7 GeV/c by using six nuclear targets: Be, C, Al, Cu, Sn, and Pb. The experiment in question proved to be insensitive to the expected effects of a modification to the omega-meson mass in nuclear matter. As for the f{sub 2}(1270) meson, its mass and width values averaged over all experimental data, m{sub f{sub 2}} = 1275.8 {+-} 1.0(stat.) {+-} 0.4(syst.) MeV/c{sup 2} and {Gamma}{sub f{sub 2}} = 190.3 {+-} 1.9(stat.) {+-} 1.8(syst.) MeV/c{sup 2}, agree well with the world-average values. At the same time, our experimental data do not rule out the possible effect of an in-medium modification to the f{sub 2}(1270)-meson mass for heavy nuclei at a level better than 0.4%.
Authors:
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  1. Institute for High Energy Physics (Russian Federation)
Publication Date:
OSTI Identifier:
22212635
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Atomic Nuclei; Journal Volume: 76; Journal Issue: 11; Other Information: Copyright (c) 2013 Pleiades Publishing, Ltd.; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ALUMINIUM; BERYLLIUM; CARBON; COPPER; EXPERIMENTAL DATA; F2-1270 MESONS; GEV RANGE 01-10; HEAVY NUCLEI; HYPERONS; KAONS NEUTRAL; LEAD; MASS; MESON-NUCLEON INTERACTIONS; MEV RANGE; NUCLEAR MATTER; TIN