Production rate and ellipticity of lepton pairs from a rotating hot and dense QCD medium
arXiv:2111.05192 · doi:10.1103/PhysRevD.105.054014
Abstract
Using a current-current correlation function (CF), the photon polarization tensor is calculated for a rotating hot and dense QCD medium. The spectral function (SF) and the dilepton rate (DR) are estimated therefrom. Numerical results show that both SF and DR are enhanced in a rotating medium, especially in a low invariant mass region. SF and DR are also explored in the consequences of the interplay among the angular velocity, temperature and chemical potential. We also estimated the electromagnetic screening by calculating the Debye mass and it shows a suppression for a rotating QCD medium. The most interesting observation is the azimuthal anisotropy of the dilepton production, i.e, the elliptic flow of the lepton pair induced by the rotation as an external field. The competition between the centrifugal effect and the spin polarization effect due to rotation results in a convex down behaviour of the elliptic flow as a function of the transverse momentum in a relatively large magnitude of angular velocity. It is noticed that quark spin polarization induces a negative in the case of large angular velocity.
19 pages, 10 captioned figures, Title modified, v2 and Debye mass calculations have been added, Comments are welcome
References in corpus (19)
- The Chiral Magnetic Effect
- Quantum field theory in a magnetic field: From quantum chromodynamics to graphene and Dirac semimetals
- Charge separation induced by P-odd bubbles in QCD matter
- Angular momentum conservation in heavy ion collisions at very high energy
- Testing the chiral magnetic and chiral vortical effects in heavy ion collisions
- Evidence of spin-orbital angular momentum interactions in relativistic heavy-ion collisions
- Interacting fermions in rotation: chiral symmetry restoration, moment of inertia and thermodynamics
- Production and Elliptic Flow of Dileptons and Photons in the semi-Quark Gluon Plasma
- Influence of relativistic rotation on the confinement/deconfinement transition in gluodynamics
- Inhomogeneous confining-deconfining phases in rotating plasmas
- Elliptic flow of thermal dileptons in relativistic nuclear collisions
- Ellipticity of photon emission from strongly magnetized hot QCD plasma
- Effects of anomalous magnetic moment of quarks on the dilepton production from hot and dense magnetized quark matter using the NJL model
- Photon polarization tensor in a magnetized plasma: Absorptive part
- QCD phase structure under rotation
- Dilepton Radiation from Strongly Interacting Systems
- Vector meson spectral function and dilepton production rate in a hot and dense medium within an effective QCD approach
- Lepton pair production from a hot and dense QCD medium in the presence of an arbitrary magnetic field
- Chiral vortical catalysis