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Title: Eta decay and muonic puzzles

Journal Article · · Nuclear Physics. B
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)

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.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP); Science and Technology Commission of Shanghai Municipality; National Natural Science Foundation of China (NSFC)
Grant/Contract Number:
AC02-06CH11357; FG02-97ER41014
OSTI ID:
1571644
Journal Information:
Nuclear Physics. B, Vol. 944, Issue C; ISSN 0550-3213
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 5 works
Citation information provided by
Web of Science

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  • Iinuma, Hiromi; Nakayama, Hisayoshi; Oide, Katsunobu
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 832 https://doi.org/10.1016/j.nima.2016.05.126
journal October 2016

Cited By (2)

Probing light dark matter with a hadrophilic scalar mediator journal November 2019
Measuring the α-particle charge radius with muonic helium-4 ions text January 2021

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