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The ability to represent perturbative expansions of interacting quantum field theories in terms of simple diagrammatic rules has revolutionized calculations in particle physics (and elsewhere). Moreover, these rules are readily automated, a…

General Relativity and Quantum Cosmology · Physics 2024-07-30 Sergio Sevillano Muñoz , Edmund J. Copeland , Peter Millington , Michael Spannowsky

We address the prediction for the mass of the SM-like Higgs boson in NMSSM scenarios where all BSM particles, including the singlets, have masses at the TeV scale. We provide a full one-loop computation of the matching condition for the…

High Energy Physics - Phenomenology · Physics 2022-10-19 Emanuele Bagnaschi , Mark Goodsell , Pietro Slavich

VBFNLO is a flexible parton level Monte Carlo program for the simulation of vector boson fusion (VBF), double and triple vector boson (plus jet) production as well as QCD-induced single and double vector boson production plus two jets in…

High Energy Physics - Phenomenology · Physics 2014-04-16 J. Baglio , J. Bellm , F. Campanario , B. Feigl , J. Frank , T. Figy , M. Kerner , L. D. Ninh , S. Palmer , M. Rauch , R. Roth , F. Schissler , O. Schlimpert , D. Zeppenfeld

We review the current best fit values of Higgs boson masses in the Standard Model (SM) and its minimal supersymmetric extension (MSSM) obtained from existing experimental data. We also review the parameters space of the constrained MSSM…

High Energy Physics - Phenomenology · Physics 2009-06-26 S. Heinemeyer

A new release of the Monte Carlo program HERWIG (version 6.3) is now available. The main new features are new (MRST) built-in parton distribution functions, more SM gauge boson production processes, 2 to 3 MSSM Higgs production processes,…

High Energy Physics - Phenomenology · Physics 2007-05-23 G. Corcella , I. G. Knowles , G. Marchesini , S. Moretti , K. Odagiri , P. Richardson , M. H. Seymour , B. R. Webber

To obtain the most accurate predictions for the Higgs masses in the minimal supersymmetric model (MSSM), one should compute the full set of one-loop radiative corrections, resum the large logarithms to all orders, and add the dominant…

High Energy Physics - Phenomenology · Physics 2007-05-23 Howard E. Haber , Ralf Hempfling , Andre H. Hoang

State-of-the-art predictions for the mass of the lightest MSSM Higgs boson usually involve the resummation of higher-order logarithmic contributions obtained within an effective-field-theory (EFT) approach, often combined with a fixed-order…

High Energy Physics - Phenomenology · Physics 2021-02-08 Henning Bahl , Ivan Sobolev , Georg Weiglein

We evaluate the prospects for detecting a non-standard light Higgs boson with a significant branching ratio to two photons, in Run II of the Fermilab Tevatron. We derive the reach for several channels: $2\gamma$ inclusive, $2\gamma+1$ jet…

High Energy Physics - Experiment · Physics 2008-11-26 Greg Landsberg , Konstantin T. Matchev

A compact approximation formula for the mass of the lightest neutral CP-even Higgs boson, m_h, in the Minimal Supersymmetric Standard Model (MSSM) is derived from the diagrammatic two-loop result for m_h up to O(alpha alpha_s). By…

High Energy Physics - Phenomenology · Physics 2009-10-31 S. Heinemeyer , W. Hollik , G. Weiglein

We report some results of calculations of massless and massive Feynman integrals particularly focusing on difference equations for coefficients of for their series expansions

High Energy Physics - Phenomenology · Physics 2020-05-07 A. V. Kotikov

This manual describes how to use the MatCHig code for matching the charged Higgs boson production processes gg->tbH+/- and gb->tH+/-. A negative term, correcting for the double-counting between these processes, is implemented as an external…

High Energy Physics - Phenomenology · Physics 2007-05-23 Johan Alwall

We describe an extension of the FeynRules package dedicated to the automatic generation of the mass spectrum associated with any Lagrangian-based quantum field theory. After introducing a simplified way to implement particle mixings, we…

High Energy Physics - Phenomenology · Physics 2013-03-06 Adam Alloul , Jorgen D'Hondt , Karen De Causmaecker , Benjamin Fuks , Michel Rausch de Traubenberg

Since the discovery of the Higgs boson in 2012, substantial advancements have been achieved in exploring its characteristics. The utilization of extensive data sets has facilitated recent results, enabling not only the determination of the…

High Energy Physics - Experiment · Physics 2024-01-17 Walaa Elmetenawee

In the next-to minimal supersymmetric standard model (NMSSM) one additional singlet-like Higgs boson with small couplings to standard model (SM) particles is introduced. Although the mass can be well below the discovered 125 GeV Higgs boson…

High Energy Physics - Phenomenology · Physics 2018-05-28 C. Beskidt , W. de Boer , D. I. Kazakov

The publicly available spectrum generators for the NMSSM often lead to different predictions for the mass of the standard model-like Higgs boson even if using the same renormalization scheme and two-loop accuracy. Depending on the parameter…

High Energy Physics - Phenomenology · Physics 2016-03-15 Florian Staub , Peter Athron , Ulrich Ellwanger , Ramona Grober , Margarete Muhlleitner , Pietro Slavich , Alexander Voigt

The problems of Standard Model as well as questions related to Higgs boson properties led to the need for modeling of ttH associated production and Higgs boson decay to top quark pair within the MSSM model. With the help of computer…

High Energy Physics - Phenomenology · Physics 2019-09-17 T. V. Obikhod , I. A. Petrenko

A computation of inclusive cross sections for neutral Higgs boson production through gluon fusion and bottom-quark annihilation is presented in the MSSM with complex parameters. The predictions for the gluon-fusion process are based on an…

High Energy Physics - Phenomenology · Physics 2017-11-07 Stefan Liebler , Shruti Patel , Georg Weiglein

For a reliable prediction of the NMSSM Higgs boson signatures at present and future high-energy colliders and a proper distinction of the NMSSM and MSSM Higgs sector the precise knowledge of the Higgs boson masses including higher-order…

High Energy Physics - Phenomenology · Physics 2013-05-30 K. Ender , T. Graf , M. Muhlleitner , H. Rzehak

A new release of the Monte Carlo event generator Herwig++ (version 2.6) is now available. This version comes with a number of improvements including: a new structure for the implementation of next-to-leading order matrix elements; an…

High Energy Physics - Phenomenology · Physics 2012-05-23 K. Arnold , L. d'Errico , S. Gieseke , D. Grellscheid , K. Hamilton , A. Papaefstathiou , S. Platzer , P. Richardson , C. Rohr , A. Schofield , A. Siodmok , M. Stoll , D. Winn

SPheno is a program that accurately calculates the supersymmetric particle spectrum within a high scale theory, such as minimal supergravity, gauge mediated supersymmetry breaking, anomaly mediated supersymmetry breaking, or string…

High Energy Physics - Phenomenology · Physics 2008-11-26 Werner Porod