Journal article

Publication year: 2019

Journal: Physical Review D

Volume number: 100

Issue number: 11

ISSN: 2470-0010

eISSN: 2470-0029

Open access status: Hybrid

DOI Link: https://doi.org/10.1103/PhysRevD.100.116009

Publisher: American Physical Society

Abstract: 
In this work we study contributions due to vector and axial-vector meson fluctuations to their in-medium spectral functions in an effective low-energy theory inspired by the gauged linear sigma model. In particular, we show how to describe these fluctuations in the effective theory by massive (axial-)vector fields in agreement with the known structure of analogous single-particle or resonance contributions to the corresponding conserved currents. The vector and axial-vector meson spectral functions are then computed by numerically solving the analytically continued functional renormalization group flow equations for their retarded two-point functions at finite temperature and density in the effective theory. We identify the new contributions that arise due to the (axial-)vector meson fluctuations, and assess their influence on possible signatures of a QCD critical end point and the restoration of chiral symmetry in thermal dilepton spectra.

Harvard Citation style: Jung, C. and von Smekal, L. (2019) Fluctuating vector mesons in analytically continued functional RG flow equations, Physical Review D, 100(11), Article 116009. https://doi.org/10.1103/PhysRevD.100.116009

APA Citation style: Jung, C., & von Smekal, L. (2019). Fluctuating vector mesons in analytically continued functional RG flow equations. Physical Review D. 100(11), Article 116009. https://doi.org/10.1103/PhysRevD.100.116009