Indirect signs of the Peccei-Quinn mechanism
Abstract
In the Standard Model, the renormalization of the QCD vacuum angle θ is extremely tiny, and small θ is technically natural. In the general Standard Model effective field theory (SMEFT), however, Δθ is quadratically divergent, reflecting the fact that new sources of hadronic CP-violation typically produce O(1) threshold corrections to θ. The observation of such CP-violating interactions would therefore be in tension with solutions to the strong CP problem in which θ=0 is an ultraviolet boundary condition, pointing to the Peccei-Quinn mechanism as the explanation for why θ is small in the infrared. We study the quadratic divergences in θ arising from dimension-6 SMEFT operators and discuss the discovery prospects for these operators at electric dipole moment experiments, the LHC, and future proton-proton colliders.
- Authors:
- Publication Date:
- Research Org.:
- Univ. of California, Santa Barbara, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF)
- OSTI Identifier:
- 1493083
- Alternate Identifier(s):
- OSTI ID: 1602554
- Grant/Contract Number:
- SC0011095; SC0014129; SC0011702; PHY-1719642; PHY-1607611
- Resource Type:
- Published Article
- Journal Name:
- Physical Review. D.
- Additional Journal Information:
- Journal Name: Physical Review. D. Journal Volume: 99 Journal Issue: 1; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; axions; hypothetical particle physics models; particle phenomena; quantum chromodynamics
Citation Formats
de Vries, Jordy, Draper, Patrick, Fuyuto, Kaori, Kozaczuk, Jonathan, and Sutherland, Dave. Indirect signs of the Peccei-Quinn mechanism. United States: N. p., 2019.
Web. doi:10.1103/PhysRevD.99.015042.
de Vries, Jordy, Draper, Patrick, Fuyuto, Kaori, Kozaczuk, Jonathan, & Sutherland, Dave. Indirect signs of the Peccei-Quinn mechanism. United States. https://doi.org/10.1103/PhysRevD.99.015042
de Vries, Jordy, Draper, Patrick, Fuyuto, Kaori, Kozaczuk, Jonathan, and Sutherland, Dave. Thu .
"Indirect signs of the Peccei-Quinn mechanism". United States. https://doi.org/10.1103/PhysRevD.99.015042.
@article{osti_1493083,
title = {Indirect signs of the Peccei-Quinn mechanism},
author = {de Vries, Jordy and Draper, Patrick and Fuyuto, Kaori and Kozaczuk, Jonathan and Sutherland, Dave},
abstractNote = {In the Standard Model, the renormalization of the QCD vacuum angle θ is extremely tiny, and small θ is technically natural. In the general Standard Model effective field theory (SMEFT), however, Δθ is quadratically divergent, reflecting the fact that new sources of hadronic CP-violation typically produce O(1) threshold corrections to θ. The observation of such CP-violating interactions would therefore be in tension with solutions to the strong CP problem in which θ=0 is an ultraviolet boundary condition, pointing to the Peccei-Quinn mechanism as the explanation for why θ is small in the infrared. We study the quadratic divergences in θ arising from dimension-6 SMEFT operators and discuss the discovery prospects for these operators at electric dipole moment experiments, the LHC, and future proton-proton colliders.},
doi = {10.1103/PhysRevD.99.015042},
journal = {Physical Review. D.},
number = 1,
volume = 99,
place = {United States},
year = {Thu Jan 31 00:00:00 EST 2019},
month = {Thu Jan 31 00:00:00 EST 2019}
}
https://doi.org/10.1103/PhysRevD.99.015042
Web of Science
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