Decoupling of heavy sneutrinos in low-scale seesaw models

M. E. Krauss, W. Porod, F. Staub, A. Abada, A. Vicente, and C. Weiland
Phys. Rev. D 90, 013008 – Published 10 July 2014

Abstract

There have been some recent claims in the literature about large right-handed sneutrinos contributions to lepton flavor violating observables like μ3e or μe conversion in nuclei in supersymmetric low-scale seesaw models. These large contributions originate from Z-penguin diagrams which show a much weaker dependence on the heavy masses than the photonic contributions. We have traced this to an error in the evaluation of the corresponding loop amplitudes which has propagated in the literature. We explicitly show that after correcting this mistake the Z-penguins show the expected decoupling behavior. Moreover, the reported dominance of the Z-penguin over the photonic contributions disappears as well.

  • Figure
  • Figure
  • Received 30 May 2014

DOI:https://doi.org/10.1103/PhysRevD.90.013008

© 2014 American Physical Society

Authors & Affiliations

M. E. Krauss* and W. Porod

  • Institut für Theoretische Physik und Astronomie, Universität Würzburg, 97074 Würzburg, Germany

F. Staub

  • Physikalisches Institut der Universität Bonn, 53115 Bonn, Germany

A. Abada§

  • Laboratoire de Physique Théorique, CNRS–UMR 8627, Université de Paris-Sud 11, F-91405 Orsay Cedex, France

A. Vicente

  • IFPA, Département AGO, Université de Liège, Bat B5, Sart-Tilman B-4000 Liège 1, Belgium

C. Weiland

  • Laboratoire de Physique Théorique, CNRS–UMR 8627, Université de Paris-Sud 11, F-91405 Orsay Cedex, France; Departamento de Física Teórica, Universidad Autónoma de Madrid, Cantoblanco, Madrid 28049, Spain; and Instituto de Física Teórica UAM/CSIC, Calle Nicolás Cabrera 13-15, Cantoblanco, Madrid 28049, Spain

  • *manuel.krauss@physik.uni-wuerzburg.de
  • porod@physik.uni-wuerzburg.de
  • fnstaub@physik.uni-bonn.de
  • §asmaa.abada@th.u-psud.fr
  • avelino.vicente@ulg.ac.be
  • cedric.weiland@uam.es

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 90, Iss. 1 — 1 July 2014

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review D

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×