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- W3100665264 abstract "By extending the $$Phi $$ -derivable approach in the Nambu–Jona-Lasinio model to a finite magnetic field we calculate the properties of pion, $$sigma $$ , and $$rho $$ mesons in a magnetic field at finite temperature not only in the quark–antiquark bound state scheme but also in the pion–pion scattering resonant state scenario. Our calculation as a result makes manifest that the masses of $$pi ^{0}$$ and $$sigma $$ meson can be nearly degenerate at the pseudo-critical temperature which increases with increasing magnetic field strength, and the $$pi ^{pm }$$ mass ascends suddenly at almost the same critical temperature. Meanwhile the $$rho $$ mesons’ masses decrease with the temperature but increase with the magnetic field strength. We also check the Gell-Mann–Oakes–Renner relation and find that the relation can be violated clearly with increasing temperature, and the effect of the magnetic field becomes pronounced around the critical temperature. With different criteria, we analyze the effect of the magnetic field on the chiral phase transition and find that the pseudo-critical temperature of the chiral phase cross, $$T_mathrm{c}^{chi }$$ , is always enhanced by the magnetic field. Moreover, our calculations indicate that the $$rho $$ mesons will get melted as the chiral symmetry has not yet been restored, but the $$sigma $$ meson does not disassociate even at very high temperature. Particularly, it is the first to show that there does not exist a vector meson condensate in the QCD vacuum in the pion–pion scattering scheme." @default.
- W3100665264 created "2020-11-23" @default.
- W3100665264 creator A5004299434 @default.
- W3100665264 creator A5018904023 @default.
- W3100665264 creator A5042830817 @default.
- W3100665264 date "2016-06-01" @default.
- W3100665264 modified "2023-10-01" @default.
- W3100665264 title "Properties of mesons in a strong magnetic field" @default.
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