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Title: Constraints on R-parity violating couplings from lepton universality

Abstract

We analyze the one loop corrections to leptonic W and Z decays in an R-parity violating extension to the minimal supersymmetric standard model. We find that lepton universality violation in the Z line-shape variables alone would strengthen the bounds on the magnitudes of the {lambda}{sup '} couplings, but a global fit on all data leaves the bounds virtually unchanged at |{lambda}{sub 33k}{sup '}|{<=}0.42 and |{lambda}{sub 23k}{sup '}|{<=}0.50 at the 2{sigma} level. Bounds from W decays are less stringent: |{lambda}{sub 33k}{sup '}|{<=}2.4 at 2{sigma}, as a consequence of the weaker Fermilab experimental bounds on lepton universality violation in W decays. We also point out the potential of constraining R-parity violating couplings from the measurement of the {upsilon} invisible width. (c) 2000 The American Physical Society.

Authors:
 [1];  [1];  [1]
  1. Institute for Particle Physics and Astrophysics, Physics Department, Virginia Tech, Blacksburg, Virginia 24061 (United States)
Publication Date:
OSTI Identifier:
20216475
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 61; Journal Issue: 11; Other Information: PBD: 1 Jun 2000; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; W MINUS BOSONS; W PLUS BOSONS; Z NEUTRAL BOSONS; SUPERSYMMETRY; STANDARD MODEL; PARTICLE DECAY; CONSERVATION LAWS; THEORETICAL DATA

Citation Formats

Lebedev, Oleg, Loinaz, Will, and Takeuchi, Tatsu. Constraints on R-parity violating couplings from lepton universality. United States: N. p., 2000. Web. doi:10.1103/PhysRevD.61.115005.
Lebedev, Oleg, Loinaz, Will, & Takeuchi, Tatsu. Constraints on R-parity violating couplings from lepton universality. United States. doi:10.1103/PhysRevD.61.115005.
Lebedev, Oleg, Loinaz, Will, and Takeuchi, Tatsu. Thu . "Constraints on R-parity violating couplings from lepton universality". United States. doi:10.1103/PhysRevD.61.115005.
@article{osti_20216475,
title = {Constraints on R-parity violating couplings from lepton universality},
author = {Lebedev, Oleg and Loinaz, Will and Takeuchi, Tatsu},
abstractNote = {We analyze the one loop corrections to leptonic W and Z decays in an R-parity violating extension to the minimal supersymmetric standard model. We find that lepton universality violation in the Z line-shape variables alone would strengthen the bounds on the magnitudes of the {lambda}{sup '} couplings, but a global fit on all data leaves the bounds virtually unchanged at |{lambda}{sub 33k}{sup '}|{<=}0.42 and |{lambda}{sub 23k}{sup '}|{<=}0.50 at the 2{sigma} level. Bounds from W decays are less stringent: |{lambda}{sub 33k}{sup '}|{<=}2.4 at 2{sigma}, as a consequence of the weaker Fermilab experimental bounds on lepton universality violation in W decays. We also point out the potential of constraining R-parity violating couplings from the measurement of the {upsilon} invisible width. (c) 2000 The American Physical Society.},
doi = {10.1103/PhysRevD.61.115005},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 11,
volume = 61,
place = {United States},
year = {2000},
month = {6}
}