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Title: Probing Muonphilic Force Carriers and Dark Matter at Kaon Factories

Abstract

Rare kaon decays are excellent probes of light, new weakly-coupled particles. If such particles X couple preferentially to muons, they can be produced in K→ μ ν X decays. In this letter we evaluate the future sensitivity for this process at NA62 assuming X decays either invisibly or to di-muons. Our main physics target is the parameter space that resolves the (g-2)μ anomaly, where X is a gauged Lμ-Lτ vector or a muon-philic scalar. The same parameter space can also accommodate dark matter freeze out or reduce the tension between cosmological and local measurements of H0 if the new force decays to dark matter or neutrinos, respectively. We show that for invisible X decays, a dedicated single muon trigger analysis at NA62 could probe much of the remaining (g-2)μ favored parameter space. Alternatively, if X decays to muons, NA62 can perform a di-muon resonance search in K→ 3 μ ν events and greatly improve existing coverage for this process. Independently of its sensitivity to new particles, we find that NA62 is also sensitive to the Standard Model predicted rate for K → 3μ ν, which has never been measured.

Authors:
ORCiD logo; ; ;
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Florida State Univ., Tallahassee, FL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF)
Contributing Org.:
Kavli Institute for theoretical physics in Santa Barbara
OSTI Identifier:
1595513
Alternate Identifier(s):
OSTI ID: 1504475; OSTI ID: 1596627
Report Number(s):
arXiv:1902.07715; FERMILAB-PUB-18-665-A; KEK-TH-2105
Journal ID: ISSN 0031-9007; PRLTAO; 041802
Grant/Contract Number:  
AC02-07CH11359; SC0012012; PHY-1620074; 084011-550-042584; PHY-1748958
Resource Type:
Published Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Name: Physical Review Letters Journal Volume: 124 Journal Issue: 4; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Particle decays; Particle interactions; Particle production

Citation Formats

Krnjaic, Gordan, Marques-Tavares, Gustavo, Redigolo, Diego, and Tobioka, Kohsaku. Probing Muonphilic Force Carriers and Dark Matter at Kaon Factories. United States: N. p., 2020. Web. doi:10.1103/PhysRevLett.124.041802.
Krnjaic, Gordan, Marques-Tavares, Gustavo, Redigolo, Diego, & Tobioka, Kohsaku. Probing Muonphilic Force Carriers and Dark Matter at Kaon Factories. United States. doi:10.1103/PhysRevLett.124.041802.
Krnjaic, Gordan, Marques-Tavares, Gustavo, Redigolo, Diego, and Tobioka, Kohsaku. Tue . "Probing Muonphilic Force Carriers and Dark Matter at Kaon Factories". United States. doi:10.1103/PhysRevLett.124.041802.
@article{osti_1595513,
title = {Probing Muonphilic Force Carriers and Dark Matter at Kaon Factories},
author = {Krnjaic, Gordan and Marques-Tavares, Gustavo and Redigolo, Diego and Tobioka, Kohsaku},
abstractNote = {Rare kaon decays are excellent probes of light, new weakly-coupled particles. If such particles X couple preferentially to muons, they can be produced in K→ μ ν X decays. In this letter we evaluate the future sensitivity for this process at NA62 assuming X decays either invisibly or to di-muons. Our main physics target is the parameter space that resolves the (g-2)μ anomaly, where X is a gauged Lμ-Lτ vector or a muon-philic scalar. The same parameter space can also accommodate dark matter freeze out or reduce the tension between cosmological and local measurements of H0 if the new force decays to dark matter or neutrinos, respectively. We show that for invisible X decays, a dedicated single muon trigger analysis at NA62 could probe much of the remaining (g-2)μ favored parameter space. Alternatively, if X decays to muons, NA62 can perform a di-muon resonance search in K→ 3 μ ν events and greatly improve existing coverage for this process. Independently of its sensitivity to new particles, we find that NA62 is also sensitive to the Standard Model predicted rate for K → 3μ ν, which has never been measured.},
doi = {10.1103/PhysRevLett.124.041802},
journal = {Physical Review Letters},
number = 4,
volume = 124,
place = {United States},
year = {2020},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevLett.124.041802

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Cited by: 8 works
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