Search for right-handed currents in muon decay

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We report new limits on right-handed currents, based on precise measurement of the endpoint of the e/sup +/ spectrum from ..mu../sup +/ decay. Highly polarized ..mu../sup +/ from the TRIUMF surface beam were stopped in pure metal foils within either an 1.1-T spin-holding longitudinal field, or a 70-gauss spin-precessing transverse field. Decay e/sup +/ emitted within 200 mrad of the beam direction were momentum-analyzed to +-0.2%. For the spin-held data, decay via (V-A) currents requires the e/sup +/ rate to approach zero in the beam direction at the endpoint. Measurement of this rate sets the 90% confidence limits xi P/sub ... continued below

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Pages: 19

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Carr, J.; Gidal, G.; Gobbi, B.; Jodidio, A.; Oram, C.J.; Shinsky, K.A. et al. April 1, 1983.

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Description

We report new limits on right-handed currents, based on precise measurement of the endpoint of the e/sup +/ spectrum from ..mu../sup +/ decay. Highly polarized ..mu../sup +/ from the TRIUMF surface beam were stopped in pure metal foils within either an 1.1-T spin-holding longitudinal field, or a 70-gauss spin-precessing transverse field. Decay e/sup +/ emitted within 200 mrad of the beam direction were momentum-analyzed to +-0.2%. For the spin-held data, decay via (V-A) currents requires the e/sup +/ rate to approach zero in the beam direction at the endpoint. Measurement of this rate sets the 90% confidence limits xi P/sub ..mu../delta/rho > 0.9959 and M(W/sub R/) > 380 GeV, where W/sub R/ is the possible right-handed gauge boson. For the spin-precessed data we independently determine a 90% confidence limit xi P/sub ..mu../delta/rho > 0.9918. 18 references.

Physical Description

Pages: 19

Notes

NTIS, PC A02/MF A01; 1.

Source

  • Yamada conference on muon spin rotation and associated problems, Shimoda, Japan, 18 Apr 1983

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  • Other: DE84005196
  • Report No.: LBL-16889
  • Report No.: CONF-830455-11
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 5291886
  • Archival Resource Key: ark:/67531/metadc1071379

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • April 1, 1983

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  • Feb. 4, 2018, 10:51 a.m.

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  • March 30, 2018, 12:19 p.m.

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Carr, J.; Gidal, G.; Gobbi, B.; Jodidio, A.; Oram, C.J.; Shinsky, K.A. et al. Search for right-handed currents in muon decay, article, April 1, 1983; United States. (digital.library.unt.edu/ark:/67531/metadc1071379/: accessed April 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.