Renormalisation group flow and kaon condensation

The functional renormalisation group approach is applied to a system of kaons with finite chemical potential. A set of approximate flow equations for the effective couplings are derived and solved. At high scale, the system is found to be at the normal phase whereas at some critical values of the ru...

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Bibliographic Details
Published in:Journal of physics. G, Nuclear and particle physics Nuclear and particle physics, 2017-07, Vol.44 (7), p.75002
Main Author: Krippa, Boris
Format: Article
Language:English
Subjects:
functional renormalisation group
kaon
phase transitions
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Summary:The functional renormalisation group approach is applied to a system of kaons with finite chemical potential. A set of approximate flow equations for the effective couplings are derived and solved. At high scale, the system is found to be at the normal phase whereas at some critical values of the running scale it undergoes phase transition to the phase with spontaneously broken symmetry with the kaon condensate as an order parameter. The value of the condensate turns out to be quite sensitive to the kaon-kaon scattering length.
ISSN:0954-3899
1361-6471
DOI:10.1088/1361-6471/aa6fda