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Motivated by the necessity of developing theoretical models for studying the electroweak structure of baryons in a nuclear medium, we apply a covariant quark model to study interactions of baryons with nuclear matter. The electromagnetic…

Nuclear Theory · Physics 2026-05-21 G. Ramalho , K. Tsushima , Myung-Ki Cheoun

We study the octet baryon electromagnetic form factors in nuclear matter using the covariant spectator quark model extended to the nuclear matter regime. The parameters of the model in vacuum are fixed by the study of the octet baryon…

High Energy Physics - Phenomenology · Physics 2012-12-04 G. Ramalho , K. Tsushima , A. W. Thomas

The electromagnetic structure of the baryons is modified in the nuclear medium. The modifications can be inferred from the comparison between the electromagnetic form factors in medium with the respective form factor in vacuum. Of…

High Energy Physics - Phenomenology · Physics 2021-10-28 G. Ramalho , K. Tsushima , J. P. B. C. de Melo

We study the axial-vector and the induced pseudoscalar form factors associated with the weak transitions between the octet baryon members in nuclear medium, using a covariant constituent quark model. We extend previous calculations of the…

High Energy Physics - Phenomenology · Physics 2025-04-18 G. Ramalho , K. Tsushima , Myung-Ki Cheoun

We explore the modifications of hadron structure in a nuclear medium, focusing on the spacelike electromagnetic form factors (EMFFs) of light and heavy-light pseudoscalar mesons. By combining the light-front quark model (LFQM) with the…

High Energy Physics - Phenomenology · Physics 2025-06-04 Ahmad Jafar Arifi , Parada T. P. Hutauruk , Kazuo Tsushima

We have calculated the in-medium magnetic moments of octet baryons in the presence of hot and dense symmetric nuclear matter. Effective magnetic moments of baryons have been derived from medium modified quark masses within chiral SU(3)…

High Energy Physics - Phenomenology · Physics 2017-07-03 Harpreet Singh , Arvind Kumar , Harleen Dahiya

Masses of hadrons (baryons as well as mesons) are modified in the nuclear medium because of their interactions. In this paper we investigate the effect of in-medium meson masses on the properties of the nuclear matter. The calculations are…

Nuclear Theory · Physics 2007-05-23 Abhijit Bhattacharya , Sanjay K. Ghosh , S. C. Phatak

Medium modification of the magnetic moments of octet baryons in the isospin asymmetric nuclear medium at finite temperature has been calculated using medium modified quark and baryon masses derived in chiral SU(3) quark mean field model.…

Nuclear Theory · Physics 2018-12-21 Harpreet Singh , Arvind Kumar , Harleen Dahiya

Impact of the in-medium modified nucleon weak and electromagnetic form factors on the neutrino mean free path in dense matter is studied by considering both the weak and electromagnetic interactions of neutrinos with the constituents of the…

Nuclear Theory · Physics 2018-08-08 Parada T. P. Hutauruk , Yongseok Oh , K. Tsushima

Starting with the Strongly Correlated Quark Model of a hadron structure, SCQM, we demonstrate how the properties of mesons and baryons are modified in a hot and dense nuclear environment. These in-medium modifications can lead to the…

Nuclear Theory · Physics 2019-05-01 G. Musulmanbekov

We study the magnetic moments of the octet, decuplet, low-lying charm, and low-lying bottom baryons with nonzero light quarks in symmetric nuclear matter using the quark-meson coupling (QMC) model, which satisfies the constraint for the…

High Energy Physics - Phenomenology · Physics 2022-05-04 Kazuo Tsushima

Effects of the in-medium modifications of nucleon form factors on neutrino interaction in dense matter are presented by considering both the weak and electromagnetic interactions of neutrinos with the constituents of the matter. A…

Nuclear Theory · Physics 2020-01-08 Parada T. P. Hutauruk , Yongseok Oh , K. Tsushima

We review the effect of hadron structure changes in a nuclear medium using the quark-meson coupling (QMC) model, which is based on a mean field description of non-overlapping nucleon (or baryon) bags bound by the self-consistent exchange of…

High Energy Physics - Phenomenology · Physics 2008-11-26 K. Saito , K. Tsushima , A. W. Thomas

We examine the properties of composite octet baryons in the nuclear medium and neutron star matter. The internal quark-diquark structure of the octet baryons and the equations of state of nuclear matter and neutron star matter in the mean…

Nuclear Theory · Physics 2023-12-20 Kaito Noro , Wolfgang Bentz , Ian C. Cloët , Teruyuki Kitabayashi

Recent data on polarized proton knockout reactions off He-4 nuclei suggest a small but nonzero modification of proton electromagnetic form factors in medium. Using model independent relations derived on the basis of quark-hadron duality, we…

Nuclear Theory · Physics 2008-11-26 W. Melnitchouk , K. Tsushima , A. W. Thomas

By using the AdS/CFT correspondence, we investigate various form factors between nucleons and mesons in a nuclear medium. In order to describe a nuclear medium holographically, we take into account the thermal charged AdS geometry with an…

High Energy Physics - Theory · Physics 2018-02-14 Chanyong Park , Jung Hun Lee

We investigate the change of magnetic moments of octet baryons in nuclear matter at a finite density and temperature. Quark-meson coupling models are employed in describing properties of octet baryons and their interactions. Magnetic…

Nuclear Theory · Physics 2011-11-10 C. Y. Ryu , C. H. Hyun , M. -K. Cheoun

We discuss the electromagnetic form factors, axial form factors, and structure functions of a bound nucleon in the quark-meson coupling (QMC) model. Free space nucleon form factors are calculated using the improved cloudy bag model (ICBM).…

Nuclear Theory · Physics 2007-05-23 K. Tsushima , D. H. Lu , W. Melnitchouk , K. Saito , A. W. Thomas

The dynamics of partons inside the light $\rho$ meson is found to be essential for its properties and internal structure, both in free space and in the nuclear medium. In this paper, we systematically investigate the in-medium structure…

Nuclear Theory · Physics 2025-12-19 Parada T. P. Hutauruk , Terry Mart , Kazuo Tsushima

The ratios of the baryon electric ($G_E$) to magnetic ($G_M$) form factors, $G_E/G_M$, can provide us with important information on the structure of baryons in vacuum as demonstrated in recent studies for the proton and neutron systems. It…

High Energy Physics - Phenomenology · Physics 2019-08-01 G. Ramalho , J. P. B. C. de Melo , K. Tsushima
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