ترغب بنشر مسار تعليمي؟ اضغط هنا

Symmetry breaking effect on the inhomogeneous chiral transition in the magnetic field

154   0   0.0 ( 0 )
 نشر من قبل Yoshiike Ryo Mr.
 تاريخ النشر 2015
  مجال البحث
والبحث باللغة English




اسأل ChatGPT حول البحث

We study the change of the effect of the current quark mass on the inhomogeneous chiral phase in the QCD phase diagram, and discuss the property of the phase transition by the generalized Ginzburg-Landau expansion. The strong external magnetic field spreads this phase over the low chemical potential region even if the current quark mass is finite. This implies that the existence of this phase can be explored by the lattice QCD simulation.



قيم البحث

اقرأ أيضاً

Inhomogeneous chiral phase is discussed in the presence of the magnetic field. A topological aspect is pointed out for the complex order parameter, in relation to the spectral asymmetry of the Dirac operator. It induces an anomalous baryon number and extremely extends the region of the inhomogeneous chiral phase in the QCD phase diagram. It is also shown that the novel tricritical point appears at zero chemical potential, which should be examined by the lattice QCD simulation.
71 - D.-S. Lee , C.N. Leung , 1997
Using the nonperturbative Schwinger-Dyson equation, we show that chiral symmetry is dynamically broken in QED at weak couplings when an external magnetic field is present, and that chiral symmetry is restored at temperatures above $T_c simeq alphapi^ 2/sqrt{2 pi |eH|}$, where $alpha$ is the fine structure constant and $H$ is the magnetic field strength.
145 - C. N. Leung , S.-Y. Wang 2005
The gauge independence of the dynamical fermion mass generated through chiral symmetry breaking in QED in a strong, constant external magnetic field is critically examined. We present a (first, to the best of our knowledge) consistent truncation of t he Schwinger-Dyson equations in the lowest Landau level approximation. We demonstrate that the dynamical fermion mass, obtained as the solution of the truncated Schwinger-Dyson equations evaluated on the fermion mass shell, is manifestly gauge independent.
124 - Shoji Hashimoto 2009
Using lattice QCD we study the spectrum of low-lying fermion eigenmodes. According to the Banks-Casher relation, accumulation of the low-mode is responsible for the spontaneous breaking of chiral symmetry in the QCD vacuum. On the lattice we use the overlap fermion formulation that preserves exact chiral symmetry. This is essential for the study of low-lying eigenmode distributions. Through a detailed comparison with the expectations from chiral perturbation theory beyond the leading order, we confirm the senario of the spontaneous symmetry breaking and determine some of the low energy constants. We also discuss on other related physical quantities, which can be studied on the lattice with exact chiral symmetry.
372 - P. Jasinski , C. N. Leung 2004
We study chiral symmetry breaking in QED when a uniform external magnetic field is present. We calculate higher order corrections to the dynamically generated fermion mass and find them to be small. In so doing we correct an error in the literature r egarding the matrix structure of the fermion self-energy.
التعليقات
جاري جلب التعليقات جاري جلب التعليقات
سجل دخول لتتمكن من متابعة معايير البحث التي قمت باختيارها
mircosoft-partner

هل ترغب بارسال اشعارات عن اخر التحديثات في شمرا-اكاديميا