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We have calculated the complete one-loop corrections to the sfermion pair production process e+e- -> sf_i sf_j (f = t, b, tau, tau-neutrino) in the Minimal Supersymmetric Standard Model. Our results also include the previously calculated…

High Energy Physics - Phenomenology · Physics 2010-04-05 K. Kovarik , C. Weber , H. Eberl , W. Majerotto

The vector boson fusion (VBF) topology at the Large Hadron Collider at 14 TeV provides an opportunity to search for new physics. A feasibility study for the search of sleptons in a compressed mass spectra scenario is presented in the final…

High Energy Physics - Phenomenology · Physics 2015-06-15 Bhaskar Dutta , Tathagata Ghosh , Alfredo Gurrola , Will Johns , Teruki Kamon , Paul Sheldon , Kuver Sinha , Kechen Wang , Sean Wu

We present a parton-level study of electro-weak production of vector-boson pairs at the Large Hadron Collider, establishing the sensitivity to a set of dimension-six operators in the Standard Model Effective Field Theory (SMEFT). Different…

We consider lepton-antilepton annihilation into a fermion-antifermion pair at variable c.m. energy. We propose for this process a simple parametrization of the virtual effects of the most general model of new physics of…

High Energy Physics - Phenomenology · Physics 2009-10-31 M. Beccaria , F. M. Renard , S. Spagnolo , C. Verzegnassi

We investigated the effect of the light fermion masses on cross sections for e^+e^- into 4 fermions in the Fermion Loop scheme defined in hep-ph/9612260, and approximations to it. The effects are found to be very small, except of course in…

High Energy Physics - Phenomenology · Physics 2009-10-30 Jiri Hoogland , Geert Jan van Oldenborgh

In this Letter we study the double diffractive vector meson production in $e^+e^-$ collisions assuming the dominance of the BFKL pomeron exchange. We consider the non-forward solution of the BFKL equation at high energy and large momentum…

High Energy Physics - Phenomenology · Physics 2008-11-26 V. P. Goncalves , W. K. Sauter

We review the decay properties and production mechanisms of the Standard-Model Higgs boson at a future e^+e^- linear collider with special emphasis on the influence of quantum corrections. We also discuss how its quantum numbers and…

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

We investigate the role of anomalous gauge boson and fermion couplings on the production of $WZ$ and $W^+W^-$ pairs at the LHC to NLO QCD in the Standard Model effective field theory, including dimension-6 operators. Our results are…

High Energy Physics - Phenomenology · Physics 2020-01-01 Julien Baglio , Sally Dawson , Samuel Homiller

We present results of a calculation of the cross section for the production of a charged Higgs boson in association with an electron and a neutrino at electron-positron colliders (e+ e- -> H+ e- nu_e-bar, H- e+ nu_e). We study predictions…

High Energy Physics - Phenomenology · Physics 2008-11-26 Oliver Brein , Terrance Figy

We present results for Higgs boson pair production in gluon fusion at next-to-leading order in QCD, including effects of anomalous couplings within Standard Model Effective Field Theory (SMEFT). In particular, we investigate truncation…

High Energy Physics - Phenomenology · Physics 2023-03-01 Gudrun Heinrich , Jannis Lang

We study the phenomenology of the charged Higgs boson at future muon colliders. We investigate both the pair production $\mu^+ \mu^- \to H^+ H^-$, the single production $\mu^+ \mu^- \to W^\pm H^\mp$, as well as the Vector Boson Fusion (VBF)…

High Energy Physics - Phenomenology · Physics 2024-05-14 Brahim Ait Ouazghour , Abdesslam Arhrib , Kingman Cheung , Es-said Ghourmin , Larbi Rahili

We study the potential of high-energy photon colliders for the production of gluino pairs within the Minimal Supersymmetric Standard Model (MSSM). In this model, the process gamma gamma -> gluino gluino is mediated by quark/squark box…

High Energy Physics - Phenomenology · Physics 2011-09-13 S. Berge , M. Klasen

We study the pair production, string breaking, and hadronization of a receding electron-positron pair using the bosonized version of the massive Schwinger model in quantum electrodynamics in 1+1 space-time dimensions. Specifically, we study…

High Energy Physics - Theory · Physics 2024-09-02 Laura Batini , Lara Kuhn , Jürgen Berges , Stefan Floerchinger

The general real singlet extension of the Standard Model (SM), the RxSM, is one of the simplest theories Beyond-the-Standard Model (BSM) that can accommodate a strong first-order electroweak phase transition (SFOEWPT). We investigate the…

High Energy Physics - Phenomenology · Physics 2026-03-20 Johannes Braathen , Sven Heinemeyer , Carlos Pulido Boatella , Alain Verduras Schaeidt

We analyze a quantum kinetic equation describing both boson and fermion pair production and explore analytically and numerically the solution of the non-Markovian kinetic equation. In the Markovian limit of the kinetic equation we find an…

High Energy Physics - Phenomenology · Physics 2016-08-25 S. Schmidt , D. Blaschke , G. Ropke , A. V. Prozorkevich , S. A. Smolyansky , V. D. Toneev

The electroweak production processes of vector bosons, $e^+ e^- \rightarrow Z \gamma$, $\gamma e \rightarrow Ze$, and $\gamma e \rightarrow W \nu$ are considered simultaneousely and in the Standard model the covariant polarization density…

High Energy Physics - Phenomenology · Physics 2008-11-26 J. S. Shim , S. W. Baek , H. S. Song

We discuss the production at $e^+e^-$ colliders of Higgs bosons in association with both the scalar leptons and the lightest neutralinos in the Minimal Supersymmetric extension of the Standard Model. While the rates for associated Higgs…

High Energy Physics - Phenomenology · Physics 2009-11-07 Aseshkrishna Datta , Abdelhak Djouadi , Jean-Loic Kneur

We study the bremsstrahlung of virtual omega mesons due to the collective deceleration of nuclei at the initial stage of an ultrarelativistic heavy-ion collision. It is shown that electromagnetic decays of these mesons may give an important…

High Energy Physics - Phenomenology · Physics 2008-11-26 I. N. Mishustin , L. M. Satarov , H. Stoecker , W. Greiner

Due to the greater experimental precision expected from the currently ongoing LHC Run 3, equally accurate theoretical predictions are essential. We update the documentation of the Resummino package, a program dedicated to precision cross…

High Energy Physics - Phenomenology · Physics 2023-08-09 J. Fiaschi , B. Fuks , M. Klasen , A. Neuwirth

The top-pair production in association with a $Z^0$-boson at a photon-photon collider is an important process in probing the coupling between top-quarks and vector boson and discovering the signature of possible new physics. We describe the…

High Energy Physics - Phenomenology · Physics 2009-08-11 Dong Chuan-Fei , Ma Wen-Gan , Zhang Ren-You , Guo Lei , Wang Shao-Ming