Measurement of neutral-meson masses in meson-nucleus interactions at a momentum of 7 GeV/c at the Hyperon-M setup
The π{sup 0}, η, K{sup 0}, ω, 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, <##> $$ m{sub {f_2 }} $$m{sub f{sub 2}} = 1275.8 ± 1.0(stat.) ± 0.4(syst.) MeV/c{sup 2} and <##> $$ /Gamma {sub {f_2 }} $$Γ{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%.
- OSTI ID:
- 22212635
- Journal Information:
- Physics of Atomic Nuclei, Vol. 76, Issue 11; Other Information: Copyright (c) 2013 Pleiades Publishing, Ltd.; http://www.springer-ny.com; This record replaces 45033592; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7788
- Country of Publication:
- United States
- Language:
- English
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