TITLE

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

AUTHOR(S)
Bogolyubsky, M. Yu.; Evdokimov, S. V.; Izucheev, V. I.; Patalakha, D. I.; Polishchuk, B. V.; Sadovsky, S. A.; Soloviev, A. S.; Stolpovsky, M. V.; Kharlov, Yu. V.; Kuzmin, N. A.; Obudovsky, V. P.; Petukhov, Yu. P.; Sychkov, S. Ya.
PUB. DATE
November 2013
SOURCE
Physics of Atomic Nuclei;Nov2013, Vol. 76 Issue 11, p1324
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The π0, η, K0, ω, and f2(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 f2(1270) meson, its mass and width values averaged over all experimental data, $$m_{f_2 }$$ = 1275.8 ± 1.0(stat.) ± 0.4(syst.) MeV/ c2 and $$\Gamma _{f_2 }$$ = 190.3 ± 1.9(stat.) ± 1.8(syst.) MeV/ c2, 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 f2(1270)-meson mass for heavy nuclei at a level better than 0.4%.
ACCESSION #
91955562

 

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