skip to main content

DOE PAGESDOE PAGES

Title: Constraining axion dark matter with Big Bang Nucleosynthesis

We show that Big Bang Nucleosynthesis (BBN) significantly constrains axion-like dark matter. The axion acts like an oscillating QCD θ angle that redshifts in the early Universe, increasing the neutron–proton mass difference at neutron freeze-out. An axion-like particle that couples too strongly to QCD results in the underproduction of during BBN and is thus excluded. The BBN bound overlaps with much of the parameter space that would be covered by proposed searches for a time-varying neutron EDM. The QCD axion does not couple strongly enough to affect BBN
Authors:
 [1] ;  [1] ;  [2] ;  [2]
  1. Institute for Advanced Study, Princton, NJ (United States)
  2. Princeton Univ., NJ (United States). Department of Physics
Publication Date:
Grant/Contract Number:
SC0009988
Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 737; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
Institute for Advanced Study, Princton, NJ (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1197816
Alternate Identifier(s):
OSTI ID: 1454765

Blum, Kfir, D'Agnolo, Raffaele Tito, Lisanti, Mariangela, and Safdi, Benjamin R. Constraining axion dark matter with Big Bang Nucleosynthesis. United States: N. p., Web. doi:10.1016/j.physletb.2014.07.059.
Blum, Kfir, D'Agnolo, Raffaele Tito, Lisanti, Mariangela, & Safdi, Benjamin R. Constraining axion dark matter with Big Bang Nucleosynthesis. United States. doi:10.1016/j.physletb.2014.07.059.
Blum, Kfir, D'Agnolo, Raffaele Tito, Lisanti, Mariangela, and Safdi, Benjamin R. 2014. "Constraining axion dark matter with Big Bang Nucleosynthesis". United States. doi:10.1016/j.physletb.2014.07.059.
@article{osti_1197816,
title = {Constraining axion dark matter with Big Bang Nucleosynthesis},
author = {Blum, Kfir and D'Agnolo, Raffaele Tito and Lisanti, Mariangela and Safdi, Benjamin R.},
abstractNote = {We show that Big Bang Nucleosynthesis (BBN) significantly constrains axion-like dark matter. The axion acts like an oscillating QCD θ angle that redshifts in the early Universe, increasing the neutron–proton mass difference at neutron freeze-out. An axion-like particle that couples too strongly to QCD results in the underproduction of during BBN and is thus excluded. The BBN bound overlaps with much of the parameter space that would be covered by proposed searches for a time-varying neutron EDM. The QCD axion does not couple strongly enough to affect BBN},
doi = {10.1016/j.physletb.2014.07.059},
journal = {Physics Letters. Section B},
number = C,
volume = 737,
place = {United States},
year = {2014},
month = {8}
}