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Based on a prior determination of the $\phi$ selfenergy in a nuclear medium we perform a theoretical study of inclusive $\phi$ photoproduction in nuclei, looking at the $A$ dependence of the cross sections for different $\phi$ momenta. We…

Nuclear Theory · Physics 2011-02-09 D. Cabrera , L. Roca , E. Oset , H. Toki , M. J. Vicente Vacas

We have studied the decay of the \phi meson in nuclear matter by taking into account the renormalization of the K and \bar{K} mesons in the medium. We separate the contribution of the total width into different reaction channels, K\bar{K}…

Nuclear Theory · Physics 2009-11-06 E. Oset , A. Ramos

The photo-production of $\phi$ mesons from Li, C, Al, and Cu at forward angles has been measured at $E_gamma$=1.5--2.4 GeV. The number of events for incoherent phi photo-production is found to have a target mass number dependence of…

We investigate the consequences of possible medium modifications of the phi meson at finite nuclear matter density on the K+K- mass distribution in photonuclear reactions. The inclusive cross sections for K+K- pair production are calculated…

Nuclear Theory · Physics 2009-11-07 P. Muehlich , T. Falter , C. Greiner , J. Lehr , M. Post , U. Mosel

Exploring the mass modifications of $\phi$ mesons in nuclei provides insights into the nature of strongly interacting matter. Specifically, $\phi$ meson mass shifts can be related to the in-medium modification of the strange quark…

High Energy Physics - Phenomenology · Physics 2026-03-20 Gabor Balassa , Kazuya Aoki , Philipp Gubler , Su Houng Lee , Hiroyuki Sako , Gyorgy Wolf

The vacuum spectrum of the $\phi$-meson is characterized by its decay into $K{\bar K} $. Modifications of the $K {\bar K}$-loops in baryonic matter change this spectrum. We calculate these in-medium modifications taking both s- and p-wave…

High Energy Physics - Phenomenology · Physics 2009-10-30 F. Klingl , T. Waas , W. Weise

We perform calculations for the production of $\phi$ mesons in nuclei at energies just above threshold and study the $A$ dependence of the cross section. We use results for the $\phi$ selfenergy in the medium obtained within a chiral…

Nuclear Theory · Physics 2009-11-10 V. K. Magas , L. Roca , E. Oset

The mass and decay width of the $\phi$ meson in cold nuclear matter are computed in an effective Lagrangian approach, with the medium dependence of these properties obtained by evaluating kaon-antikaon loop contributions to the $\phi$…

Nuclear Theory · Physics 2017-11-29 J. J. Cobos-Martínez , K. Tsushima , G. Krein , A. W. Thomas

Production and in-medium modification of hidden strange $\phi$ mesons are studied in proton-nucleus reactions - p+C, p+Cu and p+Pb - at 12 GeV/c, partially measured by the KEK E325 collaboration via the dilepton decay mode. This work is…

High Energy Physics - Phenomenology · Physics 2024-08-29 Philipp Gubler , Masaya Ichikawa , Taesoo Song , Elena Bratkovskaya

The mass and decay width of the $\phi$ meson in cold nuclear matter are computed in an effective Lagrangian approach. The medium dependence of these properties are obtained by evaluating kaon-antikaon loop contributions to the $\phi$…

Nuclear Theory · Physics 2017-06-07 J. J. Cobos-Martínez , K. Tsushima , G. Krein , A. W. Thomas

We study $\phi$-meson production in nuclei to investigate the in-medium modification of the $\phi$-meson spectral function at finite density. We consider (${\bar p},\phi$), ($\gamma,p$) and ($\pi^-,n$) reactions to produce a $\phi$-meson…

Nuclear Theory · Physics 2015-05-13 J. Yamagata-Sekihara , S. Hirenzaki , D. Cabrera , M. J. Vicente Vacas

We study the $A$ dependence of the $\phi$ meson production cross section in proton nucleus reactios at energies just above threshold, which are accessible in an experimental facility like COSY. This $A$ dependence has two sources: the…

Nuclear Theory · Physics 2015-06-26 V. K. Magas , L. Roca , E. Oset

We present a theoretical analysis of inclusive photoproduction of phi mesons in nuclei. In particular the dependence of the total phi meson yield on the target mass number is investigated. The calculations are done using the semi-classical…

Nuclear Theory · Physics 2008-11-26 P. Muehlich , U. Mosel

The $\omega$ and $\phi$ mesons dominantly decay outside the nucleus because the decay-lengths of them are much larger than the dimension of the nucleus. Therefore, the medium modification of the above mesons is studied through their…

Nuclear Theory · Physics 2019-11-06 Swapan Das

We study the structure and formation of the $\phi$ mesic nuclei to investigate the in-medium modification of the $\phi$-meson spectral function at finite density. We consider (${\bar p},\phi$), ($\gamma,p$) and ($\pi^-,n$) reactions to…

Nuclear Theory · Physics 2010-12-13 J. Yamagata-Sekihara , D. Cabrera , M. J. Vicente Vacas , S. Hirenzaki

We investigate the $\phi$ meson nuclear transparency using some recent theoretical developments on the $\phi$ in medium self-energy. The inclusion of direct resonant $\phi N$-scattering and the kaon decay mechanisms leads to a $\phi$ width…

Nuclear Theory · Physics 2017-09-27 D. Cabrera , A. N. Hiller Blin , M. J. Vicente Vacas , P. Fernandez de Cordoba

In the framework of the nuclear spectral function approach for incoherent primary proton-nucleon and secondary pion-nucleon production processes we study the inclusive $\phi$ meson production in the interaction of 2.83 GeV protons with…

Nuclear Theory · Physics 2008-12-18 E. Ya. Paryev

The cross section for production of Phi mesons in proton-nucleus reactions is calculated as a function of the target mass. The decay width of the Phi meson is affected by the change of the masses of the Phi, K+ and K- mesons in the medium.…

Nuclear Theory · Physics 2009-11-10 H. W. Barz , M. Zetenyi

The $\phi$ meson spectrum, which in vacuum is dominated by its coupling to the $\bar{K} K$ system, is modified in nuclear matter. Following a model based on chiral SU(3) dynamics we calculate the $\phi$ meson selfenergy in nuclear matter…

Nuclear Theory · Physics 2011-02-09 D. Cabrera , M. J. Vicente Vacas

The work presented at this workshop is divided into two parts. In the first part, the mass and decay width of the $\phi$-meson in cold nuclear matter are computed in an effective Lagrangian approach. The medium dependence of these…

Nuclear Theory · Physics 2017-11-20 J. J. Cobos-Martínez , K Tsushima , G Krein , A W Thomas
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