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Title: Charged-particle spectra from μ capture on Al

Abstract

Published data on the emission of charged particles following nuclear muon capture are extremely limited. In addition to its interest as a probe of the nuclear response, these data are important for the design of some current searches for lepton flavor violation. This work presents momentum spectra of protons and deuterons following μ- capture in aluminum. It is the first measurement of a muon capture process performed with a tracking spectrometer. A precision of better than 10% over the momentum range of 100–190MeV/c for protons is obtained; for deuterons of 145–250MeV/c the precision is better than 20%. The observed partial yield of protons with emission momenta above 80MeV/c (kinetic energy 3.4MeV) is 0.0322 ± 0.0007(stat) ± 0.0022(syst) per capture, and for deuterons above 130MeV/c (4.5MeV) it is 0.0122 ± 0.0009(stat) ± 0.0006(syst). Extrapolating to total yields gives 0.045 ± 0.001(stat) ± 0.003(syst) ± 0.001(extrapolation) per capture for protons and 0.018 ± 0.001(stat) ± 0.001(syst)± 0.002(extrapolation) for deuterons, which are the most precise measurements of these quantities to date.

Authors:
ORCiD logo; ; ; ORCiD logo; ; ORCiD logo
Publication Date:
Research Org.:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP); Natural Sciences and Engineering Research Council of Canada (NSERC); Ministry of Education and Science of the Russian Federation
OSTI Identifier:
1604505
Alternate Identifier(s):
OSTI ID: 1565951
Report Number(s):
arXiv:1908.06902; FERMILAB-PUB-19-433-E
Journal ID: ISSN 2469-9985; PRVCAN; 035502
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Published Article
Journal Name:
Physical Review. C
Additional Journal Information:
Journal Name: Physical Review. C Journal Volume: 101 Journal Issue: 3; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Gaponenko, A., Grossheim, A., Hillairet, A., Marshall, G. M., Mischke, R. E., and Olin, A. Charged-particle spectra from μ– capture on Al. United States: N. p., 2020. Web. doi:10.1103/PhysRevC.101.035502.
Gaponenko, A., Grossheim, A., Hillairet, A., Marshall, G. M., Mischke, R. E., & Olin, A. Charged-particle spectra from μ– capture on Al. United States. https://doi.org/10.1103/PhysRevC.101.035502
Gaponenko, A., Grossheim, A., Hillairet, A., Marshall, G. M., Mischke, R. E., and Olin, A. Fri . "Charged-particle spectra from μ– capture on Al". United States. https://doi.org/10.1103/PhysRevC.101.035502.
@article{osti_1604505,
title = {Charged-particle spectra from μ– capture on Al},
author = {Gaponenko, A. and Grossheim, A. and Hillairet, A. and Marshall, G. M. and Mischke, R. E. and Olin, A.},
abstractNote = {Published data on the emission of charged particles following nuclear muon capture are extremely limited. In addition to its interest as a probe of the nuclear response, these data are important for the design of some current searches for lepton flavor violation. This work presents momentum spectra of protons and deuterons following μ- capture in aluminum. It is the first measurement of a muon capture process performed with a tracking spectrometer. A precision of better than 10% over the momentum range of 100–190MeV/c for protons is obtained; for deuterons of 145–250MeV/c the precision is better than 20%. The observed partial yield of protons with emission momenta above 80MeV/c (kinetic energy 3.4MeV) is 0.0322 ± 0.0007(stat) ± 0.0022(syst) per capture, and for deuterons above 130MeV/c (4.5MeV) it is 0.0122 ± 0.0009(stat) ± 0.0006(syst). Extrapolating to total yields gives 0.045 ± 0.001(stat) ± 0.003(syst) ± 0.001(extrapolation) per capture for protons and 0.018 ± 0.001(stat) ± 0.001(syst)± 0.002(extrapolation) for deuterons, which are the most precise measurements of these quantities to date.},
doi = {10.1103/PhysRevC.101.035502},
journal = {Physical Review. C},
number = 3,
volume = 101,
place = {United States},
year = {Fri Mar 13 00:00:00 EDT 2020},
month = {Fri Mar 13 00:00:00 EDT 2020}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1103/PhysRevC.101.035502

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