Two-loop prediction of the anomalous magnetic moment of the muon in the Two-Higgs Doublet Model with GM2Calc 2
Peter Athron, Csaba Balázs, Adriano Cherchiglia, Douglas Jacob, Dominik Stöckinger, Hyejung Stöckinger-Kim, Alexander Voigt
Abstract
Abstract We present an extension of the software to calculate the muon anomalous magnetic moment ( $${a_\mu ^{{\text {BSM}}}}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>a</mml:mi> <mml:mi>μ</mml:mi> <mml:mtext>BSM</mml:mtext> </mml:msubsup> </mml:math> ) in the Two-Higgs Doublet Model. The Two-Higgs Doublet Model is one of the simplest and most popular extensions of the Standard Model. It is one of the few single field extensions that can give large contributions to $${a_\mu ^{{\text {BSM}}}}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>a</mml:mi> <mml:mi>μ</mml:mi> <mml:mtext>BSM</mml:mtext> </mml:msubsup> </mml:math> . It is essential to include two-loop corrections to explain the long standing discrepancy between the Standard Model prediction and the experimental measurement in the Two-Higgs Doublet Model. The new version 2 implements the state of the art two-loop calculation for the general, flavour violating Two-Higgs Doublet Model as well as for the flavour aligned Two-Higgs Doublet Model and the type I, II, X and Y flavour conserving variants. Input parameters can be provided in either the gauge basis or the mass basis, and we provide an easy to use SLHA-like command-line interface to specify these. Using this interface users may also select between Two-Higgs Doublet Model types and choose which contributions to apply. In addition, 2 also provides interfaces in C++, C, and , to make it easy to interface with other codes.