https://doi.org/10.1140/epjc/s10052-024-12642-8
Regular Article - Theoretical Physics
Correlation of density fluctuation in a magnetized QCD matter near the critical end point
1
Department of Physics, Darjeeling Government College, 734101, Darjeeling, India
2
Department of Physics, University of Calcutta, 92, A.P.C. Road, 700009, Kolkata, India
3
Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, 700064, Kolkata, India
4
Homi Bhabha National Institute, Training School Complex, 400085, Mumbai, India
Received:
24
June
2023
Accepted:
3
March
2024
Published online:
18
March
2024
The dynamical correlation of density fluctuation in quark gluon plasma with a critical end point has been investigated within the scope of the Müller–Israel–Stewart theory in the presence of static ultra-high external magnetic field. The dynamic structure factor of the density fluctuation exhibits three Lorentzian peaks in absence of external magnetic field – a central Rayleigh peak and two Brillouin peaks situated symmetrically on the opposite sides of the Rayleigh peak. The spectral structure displays five peaks in presence of the magnetic field due to the coupling of the magnetic field with the hydrodynamic fields in second-order hydrodynamics. The emergence of the extra peaks is due to the asymmetry in the pressure gradient caused by the external magnetic field in the system. Interestingly, it is observed that near the critical end point, all the Brillouin peaks disappear irrespective of the presence or absence of the external magnetic field.
© The Author(s) 2024
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