Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Kohyama, Hiroaki"'
Autor:
Kohyama, Hiroaki
We construct a toy model for weak interaction based on the assumption that gauge bosons form condensates. We then discuss the model predictions calculated from the effective Feynman rules which are derived through computing the effective action.
Externí odkaz:
http://arxiv.org/abs/1607.01633
Autor:
Kohyama, Hiroaki
We construct the effective model based on QCD with gluon condensate. Under the assumption that the gluons are condensed with the sharp momentum peak in the momentum space, we formulate the effective field theory incorporating both the gluon condensat
Externí odkaz:
http://arxiv.org/abs/1606.00673
Publikováno v:
Phys. Rev. D 95, 014038 (2017)
We show that universality near a critical end point implies a characteristic relation between third- and fourth-order baryon susceptibilities $\chi_3$ and $\chi_4$, resulting in a banana-shaped loop when $\chi_4$ is plotted as a function of $\chi_3$
Externí odkaz:
http://arxiv.org/abs/1603.05198
Autor:
Kohyama, Hiroaki
We try to find the relation between the three-flavor Nambu-Jona-Lasinio model and QCD based on the hypothesis that the gluon momenta are sharply condensed around the QCD scale, \mu_g. We find that the effective four- and six-fermion interactions, G_4
Externí odkaz:
http://arxiv.org/abs/1602.09056
Autor:
Kohyama, Hiroaki
We present a possible interpretation on the origin of the four-fermion interaction used in effective field theories. Inspired by the sharp momentum peak seen in Bose-Einstein condensate state, we incorporate the special gluon condensate effect into t
Externí odkaz:
http://arxiv.org/abs/1601.07832
Autor:
Kohyama, Hiroaki
We study the gauge dependence on the chiral phase transition of Quantum chromodynamics at finite temperature based on the quenched Schwinger-Dyson equation. We first solve the equations without approximations at finite temperature in general gauge, t
Externí odkaz:
http://arxiv.org/abs/1601.04404
We study the three-flavor Nambu--Jona-Lasinio model with various regularization procedures. We perform parameter fitting in each regularization and apply the obtained parameter sets to evaluate various physical quantities, several light meson masses,
Externí odkaz:
http://arxiv.org/abs/1601.02411
Publikováno v:
Phys. Rev. D 93, 034037 (2016)
We evaluate the third- and fourth-order baryon, charge and strangeness susceptibilities near a chiral critical point using the Nambu-Jona-Lasinio model. We identify robust qualitative behaviours of the susceptibilities along hypothetical freeze-out l
Externí odkaz:
http://arxiv.org/abs/1509.04968
Autor:
Kohyama, Hiroaki
We present the exact numerical solutions for the Schwinger-Dyson equations at finite temperature with general gauge in Abelian gauge theory. We then study the chiral phase transition on temperature from the obtained solutions. We find that, within th
Externí odkaz:
http://arxiv.org/abs/1508.03463
Autor:
Kohyama, Hiroaki
We study the regularization dependence on the quenched Schwinger-Dyson equations in general gauge by applying the two types of regularizations, the four and three dimensional momentum cutoffs. The obtained results indicate that the solutions are not
Externí odkaz:
http://arxiv.org/abs/1507.08231