Soft Interactions in Cold Quark Matter

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http://hdl.handle.net/10138/335946

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Gorda , T , Kurkela , A , Paatelainen , R , Sappi , S & Vuorinen , A 2021 , ' Soft Interactions in Cold Quark Matter ' , Physical Review Letters , vol. 127 , no. 16 , 162003 . https://doi.org/10.1103/PhysRevLett.127.162003

Title: Soft Interactions in Cold Quark Matter
Author: Gorda, Tyler; Kurkela, Aleksi; Paatelainen, Risto; Sappi, Saga; Vuorinen, Aleksi
Other contributor: University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Department of Physics

Date: 2021-10-15
Language: eng
Number of pages: 6
Belongs to series: Physical Review Letters
ISSN: 0031-9007
DOI: https://doi.org/10.1103/PhysRevLett.127.162003
URI: http://hdl.handle.net/10138/335946
Abstract: Accurate knowledge of the thermodynamic properties of zero-temperature, high-density quark matter plays an integral role in attempts to constrain the behavior of the dense QCD matter found inside neutronstar cores, irrespective of the phase realized inside the stars. In this Letter, we consider the weak-coupling expansion of the dense QCD equation of state and compute the next-to-next-to-next-to-leading-order contribution arising from the non-Abelian interactions among long-wavelength, dynamically screened gluonic fields. Accounting for these interactions requires an all-loop resummation, which can be performed using hard-thermal-loop (HTL) kinematic approximations. Concretely, we perform a full two-loop computation using the HTL effective theory, valid for the long-wavelength, or soft, modes. We find that the soft sector is well behaved within cold quark matter, contrary to the case encountered at high temperatures, and find that the new contribution decreases the renormalization-scale dependence of the equation of state at high density.
Subject: GAUGE VECTOR-MESONS
GROUND-STATE ENERGY
FINITE-TEMPERATURE
DAMPING RATE
QCD
FERMIONS
DENSITY
114 Physical sciences
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