We consider two flavor magnetized quark matter in the presence of a repulsive vector coupling ($G_V$) devoting special attention to the low temperature region of the phase diagram to show how this type of interaction counterbalances the effects produced by a strong magnetic field. The most important effects occur at intermediate and low temperatures affecting the location of the critical end point as well as the region of first order chiral transitions. When $G_V=0$ the presence of high magnetic fields ($eB \ge 10 m_π^2$) increases the density coexistence region with respect to the case when $B$ and $G_V$ are absent while a decrease of this region is observed at high $G_V$ values and vanishing magnetic fields. Another interesting aspect observed at the low temperature region is that the usual decrease of the coexistence chemical value (Inverse Magnetic Catalysis) at $G_V=0$ is highly affected by the presence of the vector interaction which acts in the opposite way. Our investigation also shows that the presence of a repulsive vector interaction enhances the de Haas-van Alphen oscillations which, for very low temperatures, take place at $eB \lesssim 6 m_π^2$. We observe that the presence of a magnetic field, together with a repulsive vector interaction, gives rise to a complex transition pattern since $B$ favors the appearance of multiple solutions to the gap equation whereas $G_V$ turns some metastable solutions into stable ones allowing for a cascade of transitions to occur.
The balance of attractive and repulsive hadronic interactions: the influence of hadronic spectrum and excluded volume effects on lattice thermodynamics and consequences on experiments
Magnetized strange quark matter in a quasiparticle description
将准粒子模型推广到有限密度强磁场中奇异夸克物质的性质。对于与密度相关的夸克质量，通过增加一个有效袋参数，得到了自洽的热力学处理，该参数不仅与密度有关，而且与磁场强度有关.当磁场强度小于一个依赖于QCD标度$Λ$的$10^7$高斯阶的临界值时，磁场使奇异夸克物质在能量上更加稳定。有效袋函数在$0.3\sim 0.4$ fm $^{-3}$附近有一个最大值，而不是QCD标度参数$Λ>126$ MeV的密度的单调函数。讨论了磁场和QCD标度参数对磁化奇异夸克物质状态方程刚度和奇异星可能的最大质量的影响
Ultralight time-oscillating scalars from magnetized compact stars: electrophilic radiation and photon propagation effects
Durham University（杜伦大学）；INFN, Gruppo collegato di Salerno（意大利国家核物理研究所萨莱诺协作组）；Dipartimento di Fisica E.R. Caianiello, Università di Salerno（萨莱诺大学E.R. Caianiello物理系）
