SuperLFV: An SLHA tool for lepton flavor violating observables in supersymmetric models

Abstract

We introduce SuperLFV, a numerical tool for calculating low-energy observables that exhibit charged lepton flavor violation (LFV) in the context of the minimal supersymmetric standard model (MSSM). As the Large Hadron Collider and MEG, a dedicated μ+→e+γ experiment, are presently acquiring data, there is need for tools that provide rapid discrimination of models that exhibit LFV. SuperLFVaccepts a spectrum file compliant with the SUSY Les Houches Accord (SLHA), containing the MSSM couplings and masses with complex phases at the supersymmetry breaking scale. In this manner, SuperLFVis compatible with but divorced from existing SLHA spectrum calculators that provide the low energy spectrum. Hence, input spectra are not confined to the LFV sources provided by established SLHA spectrum calculators. Input spectra may be generated by personal code or by hand, allowing for arbitrary models not supported by existing spectrum calculators. Program summaryProgram title: SuperLFVCatalogue identifier: AERD_v1_0Program summary URL:http://cpc.cs.qub.ac.uk/summaries/AERD_v1_0.htmlProgram obtainable from: CPC Program Library, Queen’s University, Belfast, N. IrelandLicensing provisions: Standard CPC licence, http://cpc.cs.qub.ac.uk/licence/licence.htmlNo. of lines in distributed program, including test data, etc.: 12508No. of bytes in distributed program, including test data, etc.: 1510093Distribution format: tar.gzProgramming language: Java.Computer: Any computer with a Java Virtual Machine.Operating system: Unix, including OS X; Linux, Windows.RAM: <1 GbClassification: 11.6.External routines: Apache Commons, JAMANature of problem:In the era of the Large Hadron Collider, the ability to automate rapid model discrimination is needed. Dedicated experimental searches for charged lepton flavor violation (LFV) are currently operational with next generation experiments on the horizon. Generically, extensions of the standard model, including supersymmetric models, will induce LFV, such as rare muon (tau) decay. No single tool should bear the burden of providing all conceivable calculations within a certain model. Hence, it is warranted that numerical tools interoperate together and be developed as independent components, each providing defined tasks.Solution method:The Supersymmetry Les Houches Accord (SLHA) provides a standardized protocol for the interoperation of tools that provide the calculation of mass spectra in supersymmetric models, the calculation of observables, and the calculation of event generation. SuperLFV is an SLHA compliant observables calculator, with a dedicated focus on lepton flavor violation.Running time:1 s on modern systems.