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We present a fully consistent implementation of electroweak and strong radiative corrections to single W hadroproduction in the POWHEG BOX framework, treating soft and collinear photon emissions on the same ground as coloured parton…

High Energy Physics - Phenomenology · Physics 2014-11-14 L. Barze' , G. Montagna , P. Nason , O. Nicrosini , F. Piccinini

We provide a full one-loop calculation of the self energies and tadpoles of the neutral Higgs bosons of the NMSSM. In addition, we compute the two-loop O(alpha_t*alpha_s+alpha_b*alpha_s) corrections to the neutral Higgs boson masses in the…

High Energy Physics - Phenomenology · Physics 2009-11-09 G. Degrassi , P. Slavich

We have calculated the full one-loop electroweak (EW) and QCD corrections to the third generation scalar-fermion pair production processes $e^+e^- \to \gamma \gamma \to \tilde{f_i}\bar{\tilde{f_i}} (f=t,b,\tau)$ at an electron-positron…

High Energy Physics - Phenomenology · Physics 2008-11-26 Xing Li-Rong , Ma Wen-Gan , Zhang Ren-You , Jiang Yi , Han Liang , Li Gang

We summarize results for the complete one-loop electroweak logarithmic corrections for general processes at high energies and fixed angles. Our results are applicable to arbitrary matrix elements that are not mass-suppressed. We give…

High Energy Physics - Phenomenology · Physics 2007-05-23 Ansgar Denner , Stefano Pozzorini

We compute the full one-loop Electro-Weak (EW) contributions of O(alpha_S alpha_EM^3) entering the electron-positron into a quark-antiquark pair plus one gluon cross section at the Z peak and LC energies in presence of polarisation of the…

High Energy Physics - Phenomenology · Physics 2009-03-04 C. M. Carloni Calame , S. Moretti , F. Piccinini , D. A. Ross

At proton colliders, Higgs particles are dominantly produced in the gluon--gluon fusion mechanism. The Higgs--gluons coupling is mediated by heavy quark loops, and the process can serve to count the number of heavy strongly interacting…

High Energy Physics - Phenomenology · Physics 2011-01-13 A. Djouadi , P. Gambino

We present results for the Yukawa-enhanced and Higgs self-coupling type electroweak corrections to di-Higgs production in gluon fusion. The calculation of the corresponding four-scale, two-loop amplitude is carried out retaining the exact…

High Energy Physics - Phenomenology · Physics 2024-11-18 Gudrun Heinrich , Stephen Jones , Matthias Kerner , Thomas Stone , Augustin Vestner

The charged Higgs pair production via photon-photon collisions is investigated in the framework of two Higgs doublet model (2HDM), taking into account a full set of one-loop-level scattering amplitudes, i.e., including electroweak (EW)…

High Energy Physics - Phenomenology · Physics 2020-11-18 Mehmet Demirci

We calculate a full set of one-loop corrections to the Higgs boson coupling constants as well as the electroweak parameters. We compute the decay rate of the standard model (SM)-like Higgs boson ($h$) into diphoton. Renormalized Higgs…

High Energy Physics - Phenomenology · Physics 2015-06-12 Mayumi Aoki , Shinya Kanemura , Mariko Kikuchi , Kei Yagyu

We calculate the complete one-loop electroweak corrections to the inclusive $H\rightarrow ZZ$ and $H\rightarrow Z\gamma$ decays in the dimension-$6$ extension of the Standard Model Effective Field Theory (SMEFT). The corrections to…

High Energy Physics - Phenomenology · Physics 2024-06-04 Sally Dawson , Pier Paolo Giardino

The paper describes high-precision theoretical predictions obtained for the cross sections of the process $e^+e^- \to ZH$ for future electron-positron colliders. The calculations performed using the SANC platform taking into account the…

High Energy Physics - Phenomenology · Physics 2019-10-09 S. Bondarenko , Ya. Dydyshka , L. Kalinovskaya , L. Rumyantsev , R. Sadykov , V. Yermolchyk

We have studied the effects of the complete logarithmic electroweak O(alpha) corrections on the production of vector-boson pairs WZ, ZZ, and WW at the LHC. These corrections are implemented into a Monte Carlo program for pp -> 4f (+\gamma)…

High Energy Physics - Phenomenology · Physics 2008-11-26 E. Accomando , A. Denner , A. Kaiser

Since the discovery of the Higgs boson at the Large Hadron Collider, a future electron-position collider has been proposed for precisely studying its properties. We investigate the production of the Higgs boson at such an $e^+e^-$ collider…

High Energy Physics - Phenomenology · Physics 2017-09-06 Yinqiang Gong , Zhao Li , Xiaofeng Xu , Li Lin Yang , Xiaoran Zhao

We study the electroweak phase transition in a supersymmetric version of the Standard Model, in which a gauge singlet superfield is added to the Higgs sector. We show that the order of the transition is determined by the trilinear soft…

High Energy Physics - Phenomenology · Physics 2009-10-22 M. Pietroni

We compute the 1-loop correction to the electroweak observables from spin-1 resonances in SO(5)/SO(4) composite Higgs models. The strong dynamics is modeled with an effective description comprising the Nambu-Goldstone bosons and the…

High Energy Physics - Phenomenology · Physics 2015-12-01 Roberto Contino , Matteo Salvarezza

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 most interesting Higgs-production processes at future e+ e- colliders belong to the process class e+ e- -> f anti-f H. We study the full O(alpha) corrections to this reaction in the Standard Model for neutrinos and top quarks in the…

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

We calculate the two--loop electroweak corrections to the fermionic decay width of the Higgs boson at leading order in $m_{H}$. The sum of one--loop and two--loop radiative corrections turns out to be at 6% level over the whole range of…

High Energy Physics - Phenomenology · Physics 2009-10-28 Adrian Ghinculov

The precise investigation of the $W^+ W^-Z^0$ production at the $e^+e^-$ International Linear Collider(ILC) is of crucial importance in probing the couplings between massive vector gauge bosons and discovering the signature of new physics…

High Energy Physics - Phenomenology · Physics 2014-11-20 Sun Wei , Ma Wen-Gan , Zhang Ren-You , Guo Lei , Song Mao

We explore the radiative corrections to the process $Z \to b \bar b$ in models with extended Higgs sectors. The observables $R_b = \Gamma(Z \to b \bar b)/\Gamma(Z \to \rm{hadrons})$ and the $Z b \bar b$ coupling asymmetry, $A_b = (g_L^2 -…

High Energy Physics - Phenomenology · Physics 2009-10-31 Howard E. Haber , Heather E. Logan