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

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Abstract

The π 0, η, K 0, ω, and f 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 2(1270) meson, its mass and width values averaged over all experimental data, \(m_{f_2 }\) = 1275.8 ± 1.0(stat.) ± 0.4(syst.) MeV/c 2 and \(\Gamma _{f_2 }\) = 190.3 ± 1.9(stat.) ± 1.8(syst.) MeV/c 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 2(1270)-meson mass for heavy nuclei at a level better than 0.4%.

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Authors and Affiliations

  1. Institute for High Energy Physics, pl. Nauki 1, Protvino, Moscow oblast, 142281, Russia

    M. Yu. Bogolyubsky, S. V. Evdokimov, V. I. Izucheev, D. I. Patalakha, B. V. Polishchuk, S. A. Sadovsky, A. S. Soloviev, M. V. Stolpovsky, Yu. V. Kharlov, N. A. Kuzmin, V. P. Obudovsky, Yu. P. Petukhov & S. Ya. Sychkov

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  1. M. Yu. Bogolyubsky
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  2. S. V. Evdokimov
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  3. V. I. Izucheev
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  4. D. I. Patalakha
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  5. B. V. Polishchuk
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  6. S. A. Sadovsky
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  7. A. S. Soloviev
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  8. M. V. Stolpovsky
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  9. Yu. V. Kharlov
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  10. N. A. Kuzmin
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  11. V. P. Obudovsky
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  12. Yu. P. Petukhov
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  13. S. Ya. Sychkov
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Corresponding author

Correspondence to Yu. V. Kharlov.

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Original Russian Text © M.Yu. Bogolyubsky, S.V. Evdokimov, V.I. Izucheev, D.I. Patalakha, B.V. Polishchuk, S.A. Sadovsky, A.S. Soloviev, M.V. Stolpovsky, Yu.V. Kharlov, N.A. Kuzmin, V.P. Obudovsky, Yu.P. Petukhov, S.Ya. Sychkov, 2013, published in Yadernaya Fizika, 2013, Vol. 76, No. 11, pp. 1389–1403.

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Bogolyubsky, M.Y., Evdokimov, S.V., Izucheev, V.I. et al. Measurement of neutral-meson masses in meson-nucleus interactions at a momentum of 7 GeV/c at the Hyperon-M setup. Phys. Atom. Nuclei 76, 1324–1338 (2013). https://doi.org/10.1134/S1063778813110045

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  • DOI: https://doi.org/10.1134/S1063778813110045

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