Effect of vector interaction on magnetized strange quark matter and strange quark star

Kumari, Manisha; Kumar, Arvind

doi:10.1016/j.nuclphysa.2022.122442

Cited by 4 publications

(1 citation statement)

References 120 publications

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“…The occurrence of magnetic catalysis (MC) or inverse magnetic catalysis (IMC) in a nuclear medium with finite external magnetic field depends upon whether the magnetic moments of baryons are included in the study or not [23,24]. The anomalous magnetic moments of baryons are also important for investigating the properties of magnetars [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Impact of summer moong through improved technology in Jalandhar district of Punjab, India

Kumar¹,

Boparai²

2020

Int.J.Curr.Microbiol.App.Sci

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In the present work we study the masses and magnetic moments of decuplet baryons in isospin asymmetric strange hadronic medium at finite temperature using chiral SU(3) quark mean field model. In the strange isospin asymmetric medium, the properties of baryons in chiral SU(3) mean field model are modified through the exchange of scalar fields σ, ζ and δ and the vector fields ω, ρ and φ. The scalar-isovector field δ and the vector-isovector field ρ signifies the finite isospin asymmetry of the medium. We calculate the in-medium constituent quark masses and masses of decuplet baryons in asymmetric strange matter within the chiral SU(3) quark mean field model and use these as input in the constituent chiral quark model to calculate the in-medium magnetic moments of decuplet baryons for different values of isospin asymmetry and strangeness fraction of hot and dense medium. For calculating the magnetic moments of baryons, contributions of valence quarks, quark sea and orbital angular momentum of quark sea are considered in the calculations.

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Section: Introductionmentioning

confidence: 99%

Impact of summer moong through improved technology in Jalandhar district of Punjab, India

Kumar¹,

Boparai²

2020

Int.J.Curr.Microbiol.App.Sci

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Cold and dense perturbative QCD in a very strong magnetic background

Fraga,

Palhares,

Restrepo

2024

Phys. Rev. D

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We compute the pressure from first principles within perturbative QCD at finite baryon density and very high magnetic fields up to two-loops and with physical quark masses. The region of validity for our framework is given by ms≪μq≪eB, where ms is the strange quark mass, μq is the quark chemical potential, e is the fundamental electric charge, and B is the magnetic field strength. We include the effects of the renormalization scale in the running coupling, αs(μq,eB), and running strange quark mass. We also discuss the simplifications that come about in the chiral limit. The effectively negligible contribution of the exchange diagram allows for building a simple analytic model for the equation of state for pure quark magnetars and computing their mass and radius at very large values of B. These results provide constraints on the behavior of the maximum mass and associated radius from perturbative QCD. We also discuss the magnetic bag model for extreme magnetic fields. Published by the American Physical Society 2024

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Charmonium production in hot magnetized hyperonic matter: Effects of the baryonic Dirac sea and pseudoscalar-vector mixing

Mishra,

Kumar,

Misra

2024

Phys. Rev. D

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We investigate the medium modifications of the masses of pseudoscalar open charm (D and D¯) mesons and the charmonium state [ψ(3770)] in hot isospin asymmetric strange hadronic medium in the presence of an external magnetic field within a chiral effective model. The in-medium partial decay widths of ψ(3770) to charged and neutral DD¯ mesons are computed from the medium modifications of the masses of the initial and final state mesons. These are computed using two light quark pair creation models—(I) the P03 model and (II) a field theoretical (FT) model of composite hadrons with quark (and antiquark) constituents. The production cross sections of ψ(3770), arising from scattering of the D and D¯ mesons, are computed from the relativistic Breit-Wigner spectral function expressed in terms of the in-medium masses and the decay widths of the charmonium state. The effects of the magnetic field are considered due to the Dirac sea (DS) of the baryons, the mixing of the pseudoscalar (S=0) and vector (S=1) meson (PV mixing), the Landau level contributions for the charged hadrons. The anomalous magnetic moments (AMMs) of the baryons are also taken into account in the present study. For magnetized nuclear matter, at ρB=ρ0, the effect of Dirac sea leads to inverse magnetic catalysis (IMC), which is drop of the magnitude of the light quark condensates (proportional to the scalar fields) with increase in the magnetic field, contrary to the opposite effect of magnetic catalysis (MC) at ρB=0. The inclusion of hyperons to the nuclear medium is observed to lead to magnetic catalysis. There are observed to be significant effects from the DS and PV mixing on the properties of the charm mesons. The production cross sections of ψ(3770) arising due to scattering of D+D−(D0D¯0) mesons in the hot magnetized strange hadronic matter are observed to have distinct peak positions, when the magnetic field is large. This is because the production cross sections have contributions from the transverse as well as longitudinal components of ψ(3770), which have nondegenerate masses due to PV [ψ(3770)−ηc′] mixing. These can have observable consequences on the dilepton spectra as well as on the production of the charm mesons in ultrarelativistic peripheral heavy ion collision experiments, where the produced magnetic field is huge. Published by the American Physical Society 2024

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Effect of vector interaction on magnetized strange quark matter and strange quark star

Cited by 4 publications

References 120 publications

Impact of summer moong through improved technology in Jalandhar district of Punjab, India

Impact of summer moong through improved technology in Jalandhar district of Punjab, India

Cold and dense perturbative QCD in a very strong magnetic background

Charmonium production in hot magnetized hyperonic matter: Effects of the baryonic Dirac sea and pseudoscalar-vector mixing

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