• Open Access

Breakdown of Chiral Perturbation Theory for the Axion Hot Dark Matter Bound

Luca Di Luzio, Guido Martinelli, and Gioacchino Piazza
Phys. Rev. Lett. 126, 241801 – Published 17 June 2021
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Abstract

We show that the commonly adopted hot dark matter bound on the axion mass ma1eV is not reliable, since it is obtained by extrapolating the chiral expansion in a region where the effective field theory breaks down. This is explicitly shown via the calculation of the axion-pion thermalization rate at the next-to-leading order in chiral perturbation theory. We finally advocate a strategy for a sound extraction of the axion hot dark matter bound via lattice QCD techniques.

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  • Received 4 February 2021
  • Accepted 21 May 2021

DOI:https://doi.org/10.1103/PhysRevLett.126.241801

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

Published by the American Physical Society

Physics Subject Headings (PhySH)

  1. Physical Systems
Particles & Fields

Authors & Affiliations

Luca Di Luzio1,2,3,*, Guido Martinelli4,†, and Gioacchino Piazza5,‡

  • 1DESY, Notkestraße 85, D-22607 Hamburg, Germany
  • 2Dipartimento di Fisica e Astronomia “G. Galilei,” Università di Padova, Italy
  • 3INFN Sezione di Padova, Via Francesco Marzolo 8, 35131 Padova, Italy
  • 4Physics Department and INFN Sezione di Roma La Sapienza, Piazzale Aldo Moro 5, 00185 Roma, Italy
  • 5IJCLab, Pôle Théorie (Bâtiment 210), CNRS/IN2P3 et Université Paris-Saclay, 91405 Orsay, France

  • *luca.diluzio@desy.de
  • guido.martinelli@roma1.infn.it
  • gioacchino.piazza@ijclab.in2p3.fr

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Issue

Vol. 126, Iss. 24 — 18 June 2021

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