Impact of magnetic field on shear viscosity of quark matter in Nambu-Jona-Lasinio model

Understand

We have investigated shear viscosity of quark matter in presence of a strong uniform magnetic field background where Nambu-Jona-Lasinio model has been considered to describe the magneto-thermodynamical properties of the medium.

• In presence of magnetic field, shear viscosity coefficient gets split into different components because of anisotropy in tangential stress of the fluid.
• Four different components can be merged to two components in limit of strong field, where collisional width of quark becomes much lower than its synchrotron frequency.
• A simplified contact diagram of quark-quark interaction can estimate a small collisional width, where strong field limit expressions are exactly applicable.