PoS - Proceedings of Science
Volume 380 - Particles and Nuclei International Conference 2021 (PANIC2021) - QCD, spin physics and chiral dynamics
Studying chiral imbalance using Chiral Perturbation Theory.
A. Vioque-Rodríguez*, Á. Gómez Nicola and D. Espriu
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Pre-published on: March 02, 2022
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Abstract
We analize the most general low-energy effective Lagrangian including local parity violating terms parametrized by an axial chemical potential $\mu_5$. This result is obtained following the external source method, up to $\mathcal{O}(p^4)$ order in the chiral expansion for two light flavours. We show that the $\mathcal{O}(p^4)$ Lagrangian includes new terms proportional to $\mu_5^2$ and new low-energy constants. Finally, the $\mu_5$ and temperature dependences of several observables related to the vacuum energy density are studied.
DOI: https://doi.org/10.22323/1.380.0369
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