Speaker
Ms
Hao Liu
(IHEP)
Description
The charged vector $\rho$ mesons in the presence of external magnetic fields at finite temperature $T$ and chemical potential $\mu$ have been investigated in the framework of the Nambu--Jona-Lasinio model. We compute the masses of charged $\rho$ mesons numerically as a function of the magnetic field for different values of $T$ and $\mu$. The self-energy of the $\rho$ meson contains the quark-loop contribution, i.e. the leading order contribution in $1/N_c$ expansion. It is found that the charged $\rho$ meson mass decreases as the magnetic field increases and drops to zero at a critical magnetic field $eB_c$. The charged vector meson condensation, i.e. the electromagnetic superconductor can be induced above the critical magnetic field. We find that at zero density, in the temperature range $200-500~ {\rm MeV}$, the critical magnetic field for charged $\rho$ condensation is in the range of $0.2-0.6~ {\rm GeV}^2$, which indicates that high temperature superconductor could be created at LHC.
Primary author
Ms
Hao Liu
(IHEP)
Co-authors
Dr
Lang Yu
(IHEP)
Prof.
Mei Huang
(IHEP)
