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(Abridged) We report on a complete study of the single top-quark production by direct supersymmetric flavor-changing neutral-current (FCNC) processes at the LHC. The total cross section for pp(gg)->t\bar{c}+\bar{t}c is computed at the…

High Energy Physics - Phenomenology · Physics 2009-01-06 David Lopez-Val , Jaume Guasch , Joan Sola

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

Motivated by the shift in experimental attention towards electroweak supersymmetric particle production at the CERN LHC, we update in this paper our precision predictions at next-to-leading order of perturbative QCD matched to resummation…

High Energy Physics - Phenomenology · Physics 2014-02-07 Benjamin Fuks , Michael Klasen , David R. Lamprea , Marcel Rothering

Question of the proper incorporation of spin effects in tau lepton decays is often of importance. In present work, case of the Z/gamma to tau+ tau- production mechanism is studied in detail. As an example, the effects due to the spin…

High Energy Physics - Phenomenology · Physics 2007-05-23 T. Pierzchala , E. Richter-Was , Z. Was , M. Worek

We present a deep learning solution to the prediction of particle production cross sections over a complicated, high-dimensional parameter space. We demonstrate the applicability by providing state-of-the-art predictions for the production…

High Energy Physics - Phenomenology · Physics 2019-06-06 Sydney Otten , Krzysztof Rolbiecki , Sascha Caron , Jong-Soo Kim , Roberto Ruiz de Austri , Jamie Tattersall

A recent global fit to the CMSSM incorporating current constraints on supersymmetry, including missing transverse energy searches at the LHC, BR(B_s to mu+ mu-) and the direct XENON100 search for dark matter, favours points towards the end…

High Energy Physics - Phenomenology · Physics 2013-03-14 M. Citron , J. Ellis , F. Luo , J. Marrouche , K. A. Olive , K. J. de Vries

We reexamine the top quark production cross section at the Tevatron and LHC, in the light of recent progress on the resummation of logarithmic soft gluon corrections. We find that resummation effects are much smaller than previously…

High Energy Physics - Phenomenology · Physics 2009-10-28 S. Catani , M. L. Mangano , P. Nason , L. Trentadue

The Large Hadron Collider (LHC) produces a vast sample of top-quark pairs and single-top quarks. Measurements of the inclusive top-quark production rates at the LHC have reached a precision of several percent and test advanced…

High Energy Physics - Experiment · Physics 2023-07-18 Miguel Angel Principe Martin

New theoretical and experimental information motivates a re-examination of the Standard Model Higgs production rates at the LHC pp collider. We present calculations of the relevant cross sections and branching ratios, including recently…

High Energy Physics - Phenomenology · Physics 2008-02-03 Z. Kunszt , S. Moretti , W. J. Stirling

Theoretical predictions for the production cross sections of leptoquarks at the CERN LHC are presented including higher-order QCD corrections. These corrections reduce the dependence on the renormalization/factorization scales…

High Energy Physics - Phenomenology · Physics 2008-11-26 M. Krämer , T. Plehn , M. Spira , P. M. Zerwas

We present results for the SM and MSSM Higgs-boson production cross sections at the Tevatron and the LHC. The SM cross sections are a compilation of the state-of-the-art theoretical predictions. The MSSM cross sections are obtained from the…

High Energy Physics - Phenomenology · Physics 2007-05-23 T. Hahn , S. Heinemeyer , F. Maltoni , G. Weiglein , S. Willenbrock

We present a fully-differential and high-precision calculation of top-quark pair-production and decay at the LHC, providing predictions for observables constructed from top-quark leptonic and $b$-flavoured jet final states. The calculation…

High Energy Physics - Phenomenology · Physics 2017-09-20 Jun Gao , Andrew S. Papanastasiou

The neutral Higgs pair production at the LHC is studied in the MSSM, the large extra dimensional (ADD) model and the Randall-Sundrum (RS) model, where the total cross section can be significantly enhanced compared to that in the SM. The…

High Energy Physics - Phenomenology · Physics 2009-09-25 C. S. Kim , Kang Young Lee , Jeonghyeon Song

The most recent results on the measurements of (tt) production and cross sections at 7 TeV are presented. These are obtained using CMS [1] and ATLAS [2] data collected in 2011. Recent results on the tt production cross section at 8 TeV…

High Energy Physics - Experiment · Physics 2019-08-15 Alicia Calderon

A search for direct top squark pair production resulting in events with either a same-flavour opposite-sign dilepton pair with invariant mass compatible with a $Z$ boson or a pair of jets compatible with a Standard Model (SM) Higgs boson…

High Energy Physics - Experiment · Physics 2017-08-09 ATLAS Collaboration

The $O(\alpha_{ew}m_{t(b)}^{2}/m_{W}^{2})$ and $O(\alpha_{ew} m_{t(b)}^4/m_W^4)$ supersymmetric electroweak corrections to the cross section for $W^{\pm}H^{\mp}$ associated production at the LHC are calculated in the minimal supersymmetric…

High Energy Physics - Phenomenology · Physics 2009-10-31 Ya Sheng Yang , Chong Sheng Li , Li Gang Jin , Shou Hua Zhu

The dominant production process for heavy charged Higgs bosons at the LHC is the associated production with heavy quarks. We have calculated the next-to-leading-order supersymmetric QCD corrections to charged-Higgs production through the…

High Energy Physics - Phenomenology · Physics 2011-03-21 Stefan Dittmaier , Michael Krämer , Michael Spira , Manuel Walser

We present NNLO cross sections for squark- antisquark production at the LHC. We have calculated new analytic expressions for the scale dependent scaling functions at one and two loop.

High Energy Physics - Phenomenology · Physics 2015-05-14 U. Langenfeld

We study the production cross sections for squarks and gluinos in collision of longitudinally polarized hadrons. The corresponding polarized partonic cross sections are computed in leading order supersymmetric QCD. The resulting asymmetries…

High Energy Physics - Phenomenology · Physics 2009-11-10 T. Gehrmann , D. Maitre , D. Wyler

I discuss Upsilon production in pp collisions at RHIC, Tevatron and LHC energies, in particular the behaviour of the differential cross section in rapidity and the impact of QCD corrections on the P_T differential cross section. I also…

High Energy Physics - Phenomenology · Physics 2015-03-20 J. P. Lansberg