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The cross-section for $\gamma\gamma\to t \bar t$ with arbitrary polarized photons is calculated within the electroweak Standard Model including the complete virtual and soft-photonic $O(\alpha)$ corrections. We present a detailed numerical…

High Energy Physics - Phenomenology · Physics 2008-11-26 A. Denner , S. Dittmaier , M. Strobel

We present complete one-loop radiative corrections to the decay rate of a top quark into a charged Higgs boson and a bottom quark, and for the decay of a charged Higgs boson into leptons. The results are discussed in the framework of the…

High Energy Physics - Phenomenology · Physics 2009-10-22 Andrzej Czarnecki

We compute the two-loop electroweak corrections due to the top quark to the gluon fusion production cross section of an intermediate-mass Higgs boson. This result, together with the previously known contribution due to the light fermions,…

High Energy Physics - Phenomenology · Physics 2011-01-13 Giuseppe Degrassi , Fabio Maltoni

We present the full order alpha electroweak radiative corrections to the double Higgs-strahlung process e+e- --> ZHH. The computation is performed with the help of GRACE-loop. After subtraction of the initial state QED radiative…

High Energy Physics - Phenomenology · Physics 2015-06-25 G. Belanger , F. Boudjema , J. Fujimoto , T. Ishikawa , T. Kaneko Y. Kurihara , K. Kato , Y. Shimizu

We summarize results for the processes $e^-\gamma \to \nu W^-, e^-Z, e^-\gamma$ within the electroweak Standard Model. We discuss the essential features of the corresponding lowest-order cross-sections and present numerical results for the…

High Energy Physics - Phenomenology · Physics 2008-02-03 A. Denner , S. Dittmaier

The complete one-loop electroweak corrections to charged Higgs boson pair production in $\gamma\gamma$ collision mode at linear colliders in the minimal supersymmetric standard model (MSSM), are calculated in this paper. We discuss the…

High Energy Physics - Phenomenology · Physics 2009-11-11 Wang Lei , Jiang Yi , Ma Wen-Gan , Han Liang , Zhang Ren-You

The high accuracy envisaged for future measurements of W-boson production at hadron colliders has to be matched by precise theoretical predictions. We study the impact of electroweak radiative corrections on W-boson production cross…

High Energy Physics - Phenomenology · Physics 2008-11-26 Silja Brensing , Stefan Dittmaier , Michael Krämer , Alexander Mück

An important mechanism for production of the Higgs boson at the prospective Large Hadron-electron Collider (LHeC) is via neutral current (NC) weak boson fusion (WBF) processes. Aside from its role in measurements of Higgs couplings within…

High Energy Physics - Phenomenology · Physics 2023-11-28 Hanying Xiong , Hongsheng Hou , Zhuoni Qian , Qingjun Xu , Bowen Wang

We calculate the complete O(alpha) electroweak radiative corrections to e+e- --> WW --> 4f in the electroweak Standard Model in the double-pole approximation. We give analytical results for the non-factorizable virtual corrections and…

High Energy Physics - Phenomenology · Physics 2008-11-26 A. Denner , S. Dittmaier , M. Roth , D. Wackeroth

Complete one-loop electroweak radiative corrections to the cross section of the process $e^+e^- \to \mu^-\mu^+ (\tau^-\tau^+)$ are evaluated with the help of the \SANC system. Higher-order contributions of the initial state radiation are…

High Energy Physics - Phenomenology · Physics 2022-11-08 A. Arbuzov , S. Bondarenko , Ya. Dydyshka , L. Kalinovskaya , L. Rumyantsev , R. Sadykov , V. Yermolchyk , U. Yermolchyk

We present numerical results on the recently completed $O(\alpha^2)$ initial state corrections to the process $e^+e^- \rightarrow \gamma^*/Z^*$, which is a central process at past and future high energy and high luminsoity colliders for…

High Energy Physics - Phenomenology · Physics 2020-01-08 J. Blümlein , A. De Freitas , C. G. Raab , K. Schönwald

We review recent theoretical progress in the computation of radiative corrections beyond one loop within the standard model of electroweak interactions, both in the gauge and Higgs sectors. In the gauge sector, we discuss universal…

High Energy Physics - Phenomenology · Physics 2007-05-23 Bernd A. Kniehl

Extensions of the Standard Model often come with additional, possibly electroweakly charged Higgs states, the prototypal example being the Two-Higgs-Doublet Model. While collider phenomenology does not exclude the possibility for some of…

High Energy Physics - Phenomenology · Physics 2019-11-18 Florian Domingo , Sebastian Paßehr

The Higgs-boson production in association with a W-boson pair at $e^+e^-$ linear colliders is one of the important processes in probing the coupling between Higgs-boson and vector gauge bosons and discovering the signature of new physics.…

High Energy Physics - Phenomenology · Physics 2009-11-18 Song Mao , Ma Wen-Gan , Zhang Ren-You , Guo Lei , Wang Shao-Ming

We calculate the ${\cal O}(\alpha_{s})$ QCD and ${\cal O}(\alpha_{{\rm ew}})$ electroweak one-loop corrections in the Standard Model framework, to the production of an intermediate Higgs boson associated with $t\bar{t}$ pair via $\gamma…

High Energy Physics - Phenomenology · Physics 2008-11-26 Chen Hui , Ma Wen-Gan , Zhang Ren-You , Zhou Pei-Jun , Hou Hong-Sheng , Sun Yan-Bin

Recently, the ATLAS and CMS collaborations jointly announced the first evidence of the rare Higgs boson decay channel $H\to Z\gamma$, with a ratio of $2.2\pm 0.7$ times the leading order standard model (SM) prediction. In order to face this…

High Energy Physics - Phenomenology · Physics 2024-09-04 Zi-Qiang Chen , Long-Bin Chen , Cong-Feng Qiao , Ruilin Zhu

The complete O(alpha) electroweak radiative corrections to e+e- --> WW --> 4f in the electroweak Standard Model are presented in the double-pole approximation. We give analytical and numerical results for the non-factorizable corrections…

High Energy Physics - Phenomenology · Physics 2007-05-23 M. Roth

The associate production of Higgs bosons with W or Z bosons, known as Higgs-strahlung, is an important search channel for Higgs bosons at the hadron colliders Tevatron and LHC for low Higgs-boson masses. We refine a previous calculation of…

High Energy Physics - Phenomenology · Physics 2015-06-03 A. Denner , S. Dittmaier , S. Kallweit , A. Mück

We present the convolution integral for fermion pair production in the electroweak standard theory to order O(alpha) including also soft photon exponentiation. The result is complete in the sense that it includes initial and final state…

High Energy Physics - Phenomenology · Physics 2010-12-09 D. Bardin , M. Bilenky , A. Chizhov , A. Sazonov , O. Fedorenko , T. Riemann , M. Sachwitz

A new framework to study electroweak physics at one-loop level in general ${\rm SU(2)_L \times U(1)_Y}$ theories is introduced. It separates the 1-loop corrections into two pieces: process specific ones from vertex and box contributions and…

High Energy Physics - Phenomenology · Physics 2008-02-03 K. Hagiwara , S. Matsumoto , C. S. Kim