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28 March 2024
 
  » arxiv » hep-ph/0010325

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Basis independent neutrino masses in the $R_p$ violating MSSM
Sacha Davidson ; Marta Losada ;
Date 27 Oct 2000
Journal Phys.Rev. D65 (2002) 075025
Subject hep-ph
AbstractWe calculate the neutrino mass matrix up to one loop order in the MSSM without R-parity, including the bilinears in the mass insertion approximation. This introduces additional diagrams usually neglected in the literature. We systematically consider the possible new diagrams, and find a few missing from our previous work. We provide analytic expressions for the mass matrix elements in the neutrino flavour basis, which are independent of the $H_d - L_i$ basis choice in the Lagrangian. We compare the contributions from different diagrams, and make ``Lagrangian-basis-independent’’ estimates of when the new diagrams need to be included. We briefly discuss the phenomenology of a toy model of bilinear R-parity violation.
Source arXiv, hep-ph/0010325
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