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Charged current universality problem and NuTeV anomaly: is SUSY to blame?

Kurylov, Andriy and Ramsey-Musolf, Michael J. and Su, Shufang (2004) Charged current universality problem and NuTeV anomaly: is SUSY to blame? In: Intersections of particle and nuclear physics. AIP Conference Proceedings. No.698. American Institute of Physics , Melville, NY, pp. 188-191. ISBN 0-7354-0169-1 http://resolver.caltech.edu/CaltechAUTHORS:20110831-130832432

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Abstract

We compute the complete one-loop contributions to low-energy charged current weak interaction observables in the Minimal Supersymmetric Standard Model (MSSM). We obtain the constraints on the MSSM parameter space which arise when precision low-energy charged current (CC) data are analyzed in tandem with measurements of the muon anomaly. The data imply a pattern of mass splittings among first and second generation sleptons and squarks which contradicts predictions of widely used models for supersymmetry breaking mediation. We also discuss the implications of these constraints on the SUSY one-loop contributions to the (anti)neutrino-nucleus deep inelastic scattering. We consider the ratios of neutral current to charged current cross sections, and compare with the deviations of these quantities from the Standard Model predictions implied by the recent NuTeV measurement. We discuss one scenario in which a right-sign effect arises, and show that it is ruled out by the CC data. We also study R parity-violating contributions. Although such effects can account for the violation of the first row CKM unitarity, they can not reproduce the NuTeV anomaly. If NuTeV anomaly is ultimately explained within the SM, R parity-violating resolution of the CKM unitarity problem can be tested in parity-violating electron scattering experiments at SLAC and TJNAF.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1063/1.1664223 DOIUNSPECIFIED
http://link.aip.org/link/?APCPCS/698/188/1PublisherUNSPECIFIED
Additional Information:© 2003 American Institute of Physics. Issue Date: 5 February 2004.
Subject Keywords:beta-decay, supersymmetric field theory, standard model, Feynman diagrams, elementary particle symmetry, charged currents
Classification Code:PACS: 23.40.Bw; 12.60.Jv; 12.15.Hh
Record Number:CaltechAUTHORS:20110831-130832432
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20110831-130832432
Official Citation:Charged current universality problem and NuTeV anomaly: is SUSY to blame? Andriy Kurylov, Michael Ramsey-Musolf, and Shufang Su, AIP Conf. Proc. 698, 188 (2004), DOI:10.1063/1.1664223
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:25186
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:31 Aug 2011 20:50
Last Modified:26 Dec 2012 13:39

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