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Constraints on Muon Decay Parameters from Neutrino Mass

Erwin, Rebecca J. and Kile, Jennifer and Ramsey-Musolf, Michael J. and Wang, Peng (2006) Constraints on Muon Decay Parameters from Neutrino Mass. In: INTERSECTIONS OF PARTICLE AND NUCLEAR PHYSICS: 9th Conference CIPAN2006. AIP Conference Proceedings. No.870. American Institute of Physics , Melville, NY, pp. 240-242. ISBN 978-0-7354-0368-0.

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We derive model-independent constraints on chirality-changing terms in the muon decay Lagrangian using limits on neutrino mass. We consider all dimension-six operators invariant under the gauge symmetry of the Standard Model which contribute to either a Dirac neutrino mass or muon decay. Taking an upper limit on neutrino mass of 1eV, we derive limits on the contributions of chirality-changing operators to the Michel parameters four orders of magnitude tighter than the current experimental constraints. We also identify two operators which, due to their flavor structure, are not constrained by neutrino mass. If near-future experiments find contributions to muon decay from these operators, it could indicate interesting flavor structure in physics beyond the SM.

Item Type:Book Section
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URLURL TypeDescription
Ramsey-Musolf, Michael J.0000-0001-8110-2479
Additional Information:© 2006 American Institute of Physics. The authors thank N. Bell, V. Cirigliano, M. Gorshteyn, P. Vogel, and M. Wise for helpful discussions. J. Kile thanks the organizers of CIPANP 2006 for the opportunity to present these results. This work was supported in part under U.S. Department of Energy contracts FG02-05ER41361 and DE-FG03-92ER40701 and National Science Foundation award PHY-0071856.
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG02-05ER41361
Department of Energy (DOE)DE-FG03-92ER40701
Subject Keywords:muon decay, neutrino mass, electroweak interactions
Series Name:AIP Conference Proceedings
Issue or Number:870
Record Number:CaltechAUTHORS:ERWaipcp06
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:6300
Deposited By: Archive Administrator
Deposited On:01 Dec 2006
Last Modified:08 Nov 2021 20:32

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