Publikationen

2022

Precise calculation of the W boson pole mass beyond the standard model with FlexibleSUSY

Athron, P. ., Bach, M. ., Jacob, D. H. J., Kotlarski, W. ., Stöckinger, D. ., & Voigt, A. . (2022). Precise calculation of the W boson pole mass beyond the standard model with FlexibleSUSY. Physical Review D, 106(9), 14. http://doi.org/10.1103/PhysRevD.106.095023 (Original work published November 2022)

Abstract

We present an updated calculation of the W boson pole mass in models beyond the standard model with FlexibleSUSY. The calculation has a decoupling behavior and allows for a precise W-pole mass prediction up to large new physics scales. We apply the calculation to several standard model extensions, including the MRSSM where we show that it can be compatible with large corrections to the W boson mass that would be needed to fit the recent 2022 CDF measurement.
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2022

Journal Article

Peter Athron

Markus Bach

Douglas Jacob

Wojciech Kotlarski

Dominik Stöckinger

Alexander Voigt

W boson

arXiv

Teilchenphysik

FlexibleSUSY
Two-loop prediction of the anomalous magnetic moment of the muon in the Two-Higgs Doublet Model with GM2Calc 2

Athron, P. ., Balazs, C. ., Cherchiglia, A. ., Jacob, D. H. J., Stöckinger, D. ., Stöckinger-Kim, H. ., & Voigt, A. . (2022). Two-loop prediction of the anomalous magnetic moment of the muon in the Two-Higgs Doublet Model with GM2Calc 2. The European Physical Journal C, 82, 31. http://doi.org/10.1140/epjc/s10052-022-10148-9 (Original work published März 2022)

Abstract

We present an extension of the GM2Calc software to calculate the muon anomalous magnetic moment (a_μ^BSM) 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_μ^BSM. 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 GM2Calc 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, GM2Calc 2 also provides interfaces in C++, C, Python and Mathematica, to make it easy to interface with other codes.
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2022

Journal Article

Peter Athron

Csaba Balazs

Adriano Cherchiglia

Douglas Jacob

Dominik Stöckinger

Hyejung Stöckinger-Kim

Alexander Voigt

arXiv

Higgs

Muon

magnetic moment

Teilchenphysik
FlexibleDecay: An automated calculator of scalar decay widths

Athron, P. ., Büchner, A. ., Harries, D. ., Kotlarski, W. ., Stöckinger, D. ., & Voigt, A. . (2022). FlexibleDecay: An automated calculator of scalar decay widths. Computer Physics Communications, 283, 27. http://doi.org/https://doi.org/10.1016/j.cpc.2022.108584 (Original work published Februar 2023)

Abstract

We present FlexibleDecay, a tool to calculate decays of scalars in a broad class of BSM models. The tool aims for high precision particularly in the case of Higgs boson decays. In the case of scalar and pseudoscalar Higgs boson decays the known higher order SM QED, QCD and EW effects are taken into account where possible. The program works in a modified MS scheme that exhibits a decoupling property with respect to heavy BSM physics, with BSM parameters themselves treated in the MS/DR-scheme allowing for an easy connection to high scale tests for, e.g., perturbativity and vacuum stability, and the many observable calculations readily available in MS/DR programs. Pure BSM effects are taken into account at the leading order, including all one-loop contributions to loop-induced processes. The program is implemented as an extension to FlexibleSUSY, which determines the mass spectrum for arbitrary BSM models, and does not require any extra configuration from the user. We compare our predictions for Higgs decays in the SM, singlet extended SM, type II THDM, CMSSM and MRSSM, as well as for squark decays in the CMSSM against a selection of publicly available tools. The numerical differences between our and other programs are explained. The release of FlexibleDecay officially deprecates the old effective couplings routines in FlexibleSUSY.
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2022

Journal Article

Peter Athron

Adam Büchner

Dylan Harries

Wojciech Kotlarski

Dominik Stöckinger

Alexander Voigt

arXiv

Teilchenphysik

Higgs

BSM

Decays

2020

Higgs-mass predictions in the MSSM and beyond

Slavich, P. ., Heinemeyer, S. ., Bagnaschi, E. ., Bahl, H. ., Goodsell, M. ., Haber, H. E., … Staub, F. . (2020). Higgs-mass predictions in the MSSM and beyond. The European Physical Journal C, 81, 71. http://doi.org/10.1140/epjc/s10052-021-09198-2 (Original work published Mai 2022)

Abstract

Predictions for the Higgs masses are a distinctive feature of supersymmetric extensions of the Standard Model, where they play a crucial role in constraining the parameter space. The discovery of a Higgs boson and the remarkably precise measurement of its mass at the LHC have spurred new efforts aimed at improving the accuracy of the theoretical predictions for the Higgs masses in supersymmetric models. The "Precision SUSY Higgs Mass Calculation Initiative" (KUTS) was launched in 2014 to provide a forum for discussions between the different groups involved in these efforts. This report aims to present a comprehensive overview of the current status of Higgs-mass calculations in supersymmetric models, to document the many advances that were achieved in recent years and were discussed during the KUTS meetings, and to outline the prospects for future improvements in these calculations.
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2020

Journal Article

Pietro Slavich

Sven Heinemeyer

Emanuele Bagnaschi

Henning Bahl

Mark Goodsell

Howard Haber

Thomas Hahn

Robert Harlander

Wolfgang Hollik

Gabriel Lee

Margarete Mühlleitner

Sebastian Paßehr

Heidi Rzehak

Dominik Stöckinger

Alexander Voigt

Carlos Wagner

Georg Weiglein

Ben Allanach

Thomas Biekötter

Sophia Borowka

Johannes Braathen

Marcela Carena

Thi Dao

Guiseppe Degrassi

Florian Domingo

Peter Drechsel

Ulrich Ellwanger

Martin Gabelmann

Ramona Gröber

Jonas Klappert

Thomas Kwasnitza

Daniel Meuser

Luminita Mihaila

Nick Murphy

Kilian Nickel

Werner Porod

E. Rojas

Ivan Sobolev

Florian Staub

arXiv

Teilchenphysik

Higgs

2017

Measurement of W± W± vector-boson scattering and limits on anomalous quartic gauge couplings with the ATLAS detector

Aaboud, M. ", Vest, A. ., & others, . . (2017). Measurement of W± W± vector-boson scattering and limits on anomalous quartic gauge couplings with the ATLAS detector. Phys. Rev. D, 96. http://doi.org/10.1103/PhysRevD.96.012007
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2017

Journal Article

Morad Aaboud

Anja Vest

others

Teilchenphysik

CERN

ATLAS Collaboration
Search for anomalous electroweak production of WW/WZ in association with a high-mass dijet system in pp collisions at sqrt(s) = 8 TeV with the ATLAS detector

Aaboud, M. ", Vest, A. ., & others, . . (2017). Search for anomalous electroweak production of WW/WZ in association with a high-mass dijet system in pp collisions at sqrt(s) = 8 TeV with the ATLAS detector. Phys. Rev. D, 95. http://doi.org/10.1103/PhysRevD.95.032001
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2017

Journal Article

Morad Aaboud

Anja Vest

others

Teilchenphysik

CERN

ATLAS Collaboration

2016

Measurements of W± Z production cross sections in pp collisions at sqrt(s) = 8 TeV with the ATLAS detector and limits on anomalous gauge boson self-couplings

Aad, G. ", Vest, A. ., & others, . . (2016). Measurements of W± Z production cross sections in pp collisions at sqrt(s) = 8 TeV with the ATLAS detector and limits on anomalous gauge boson self-couplings. Phys. Rev. D, 93. http://doi.org/10.1103/PhysRevD.93.092004
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2016

Journal Article

Georges Aad

Anja Vest

others

Teilchenphysik

CERN

ATLAS Collaboration

2014

Diboson and electroweak physics at ATLAS

Vest, A. . (2014). Diboson and electroweak physics at ATLAS. Il Nuovo Cimento. http://doi.org/10.1393/ncc/i2015-11855-0
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2014

Conference Proceedings

Anja Vest

Teilchenphysik

CERN

ATLAS Collaboration
Evidence for Electroweak Production of W± W± in pp Collisions at sqrt(s) = 8 TeV with the ATLAS Detector

Aad, G. ", Vest, A. ., & others, . . (2014). Evidence for Electroweak Production of W± W± in pp Collisions at sqrt(s) = 8 TeV with the ATLAS Detector. Phys. Rev. Lett., 113. http://doi.org/10.1103/PhysRevLett.113.141803
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2014

Journal Article

Georges Aad

Anja Vest

others

Teilchenphysik

CERN

ATLAS Collaboration

2004

Search for bosonic stop decays in R-parity violating supersymmetry in e+p collisions at HERA

Vest, A. ., & others, . . (2004). Search for bosonic stop decays in R-parity violating supersymmetry in e+p collisions at HERA. Physics Letters B, 599. http://doi.org/https://doi.org/10.1016/j.physletb.2004.08.032
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2004

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Anja Vest

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Teilchenphysik

DESY

H1 Collaboration

2022

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