Journal article
More axions from strings
- Abstract:
- We study the contribution to the QCD axion dark matter abundance that is produced by string defects during the so-called scaling regime. Clear evidence of scaling violations is found, the most conservative extrapolation of which strongly suggests a large number of axions from strings. In this regime, nonlinearities at around the QCD scale are shown to play an important role in determining the final abundance. The overall result is a lower bound on the QCD axion mass in the post-inflationary scenario that is substantially stronger than the naive one from misalignment.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
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(Preview, Version of record, pdf, 6.3MB, Terms of use)
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- Publisher copy:
- 10.21468/SciPostPhys.10.2.050
Authors
- Publisher:
- SciPost Foundation
- Journal:
- SciPost Physics More from this journal
- Volume:
- 10
- Issue:
- 2
- Article number:
- 050
- Publication date:
- 2021-02-26
- Acceptance date:
- 2021-02-19
- DOI:
- EISSN:
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2542-4653
- Language:
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English
- Pubs id:
-
1607381
- Local pid:
-
pubs:1607381
- Deposit date:
-
2024-10-11
Terms of use
- Copyright holder:
- Gorghetto et al
- Copyright date:
- 2021
- Rights statement:
- © 2021 Gorghetto et al. This work is licensed under the Creative Commons Attribution 4.0 International License. Published by the SciPost Foundation.
- Licence:
- CC Attribution (CC BY)
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