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Title: Eta decay and muonic puzzles

Abstract

New physics motivated by muonic puzzles (proton radius and muon g - 2 discrepancies) is studied. Using a light scalar boson Φ, assuming Yukawa interactions, accounts for these muonic puzzles simultaneously. Our previous work limits the existence of such a scalar boson's mass m Φ from about 160 keV to 60 MeV. We improve this result by including the influence of all of the possible particles that couple to the Φ in computing the decay rate. Doing this involves including the strong interaction physics, involving quarks, necessary to compute the ηπΦ vertex function. The Nambu-Jona-Lasinio model, which accounts for the spontaneous symmetry breaking that yields the constituent mass is employed to represent the relevant strong-interaction physics. We use the ηπΦ vertex function to reanalyze the electron beam dump experiments. The result is that the allowed range of m Φ lies between about 160 keV and 3.5 MeV. This narrow range represents an inviting target for ruling out or discovering this scalar boson. A possible UV completion of our phenomenological model is discussed.

Authors:
ORCiD logo [1];  [2];  [3]
  1. Shanghai Jiao Tong Univ. (China)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Univ. of Washington, Seattle, WA (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); Science and Technology Commission of Shanghai Municipality; National Natural Science Foundation of China (NNSFC)
OSTI Identifier:
1571644
Grant/Contract Number:  
AC02-06CH11357; FG02-97ER41014
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nuclear Physics. B
Additional Journal Information:
Journal Volume: 944; Journal Issue: C; Journal ID: ISSN 0550-3213
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Liu, Yu-Sheng, Cloët, Ian C., and Miller, Gerald A. Eta decay and muonic puzzles. United States: N. p., 2019. Web. doi:10.1016/j.nuclphysb.2019.114638.
Liu, Yu-Sheng, Cloët, Ian C., & Miller, Gerald A. Eta decay and muonic puzzles. United States. doi:10.1016/j.nuclphysb.2019.114638.
Liu, Yu-Sheng, Cloët, Ian C., and Miller, Gerald A. Thu . "Eta decay and muonic puzzles". United States. doi:10.1016/j.nuclphysb.2019.114638. https://www.osti.gov/servlets/purl/1571644.
@article{osti_1571644,
title = {Eta decay and muonic puzzles},
author = {Liu, Yu-Sheng and Cloët, Ian C. and Miller, Gerald A.},
abstractNote = {New physics motivated by muonic puzzles (proton radius and muon g - 2 discrepancies) is studied. Using a light scalar boson Φ, assuming Yukawa interactions, accounts for these muonic puzzles simultaneously. Our previous work limits the existence of such a scalar boson's mass mΦ from about 160 keV to 60 MeV. We improve this result by including the influence of all of the possible particles that couple to the Φ in computing the decay rate. Doing this involves including the strong interaction physics, involving quarks, necessary to compute the ηπΦ vertex function. The Nambu-Jona-Lasinio model, which accounts for the spontaneous symmetry breaking that yields the constituent mass is employed to represent the relevant strong-interaction physics. We use the ηπΦ vertex function to reanalyze the electron beam dump experiments. The result is that the allowed range of mΦ lies between about 160 keV and 3.5 MeV. This narrow range represents an inviting target for ruling out or discovering this scalar boson. A possible UV completion of our phenomenological model is discussed.},
doi = {10.1016/j.nuclphysb.2019.114638},
journal = {Nuclear Physics. B},
issn = {0550-3213},
number = C,
volume = 944,
place = {United States},
year = {2019},
month = {5}
}

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