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We analyze the correlation of QCD one-loop effects on the partial widths of the three neutral Higgs bosons of the MSSM decaying into quark-antiquark pairs. The SUSY-QCD effects turn out to be comparable or even larger than the standard QCD…

High Energy Physics - Phenomenology · Physics 2010-01-28 J. A. Coarasa , Ricardo A. Jimenez , Joan Sola

The medium-induced one-gluon radiation spectrum off a massive quark-antiquark ($q {\bar q}$) antenna traversing a colored QCD medium is calculated in this contribution. The gluon spectrum off the antenna computed at first order in the…

High Energy Physics - Phenomenology · Physics 2015-05-28 Néstor Armesto , Hao Ma , Yacine Mehtar-Tani , Carlos A. Salgado , Konrad Tywoniuk

We consider the physics and collider phenomenology of quirks that transform nontrivially under QCD color, SU(2)_W as well as an SU(N)_{ic} infracolor group. Our main motivation is to show that the recent Wjj excess observed by CDF naturally…

High Energy Physics - Phenomenology · Physics 2013-05-29 Roni Harnik , Graham D. Kribs , Adam Martin

The results of perturbative QCD evaluation of the ~m_f^2/M_Z^2 contributions to the decay rates in Z--->bb and Z--->hadrons for the quark masses m_f << M_Z are presented. The recent results due to the combination of renormalization group…

High Energy Physics - Phenomenology · Physics 2009-10-28 Levan R. Surguladze

At present and future hadron colliders, the precision physics program started in the past will be continued. In particular, a precise determination of the W boson mass will be carried out. This requires the calculation of the radiative…

High Energy Physics - Phenomenology · Physics 2007-05-23 C. M. Carloni Calame , G. Montagna , O. Nicrosini , M. Treccani

First results on the radiative corrections of order O(N_f\alpha_s\alpha) are presented for the off-shell production of W or Z bosons at the LHC, where N_f is the number of fermion flavours. These corrections comprise all diagrams at…

High Energy Physics - Phenomenology · Physics 2021-02-03 Stefan Dittmaier , Timo Schmidt , Jan Schwarz

Radiative interferences in the multi-parton shower is the building block of QCD jet physics in vacuum. The presence of a hot medium made of quarks and gluons is expected to alter this interference pattern. To study these effects, we derive…

High Energy Physics - Phenomenology · Physics 2012-04-26 Yacine Mehtar-Tani , Carlos A. Salgado , Konrad Tywoniuk

This talk summarizes the first calculation of the next-to-leading-order electroweak corrections to W-boson + jet hadroproduction including leptonic W-boson decays [1]. The W-boson resonance is treated consistently using the complex-mass…

High Energy Physics - Phenomenology · Physics 2014-11-20 Ansgar Denner , Stefan Dittmaier , Tobias Kasprzik , Alexander Mück

According to the basic properties of QCD, colour reconnection effects can occur in hadronic processes at high energies. The comparison of $e^{+}e^{-}\to Z^0Z^0\to q\bar{q}q'\bar{q'}$ events with the superposition of $Z^0\to q\bar{q}$ and…

High Energy Physics - Phenomenology · Physics 2011-01-25 Shi-yuan Li , Zong-guo Si , Qu-bing Xie , Qun Wang

We present an analytic expression for the two-loop QCD corrections to the decay process b -> u W^*, where b and u are a massive and massless quark, respectively, while W^* is an off-shell charged weak boson. Since the W-boson can…

High Energy Physics - Phenomenology · Physics 2011-01-27 R. Bonciani , A. Ferroglia

We consider the production of $\gamma^*, W$ and $Z$ vector bosons in hadron-hadron collisions in perturbative QCD. We present results from a new numerical program which gives a full description of the production of the vector bosons and of…

High Energy Physics - Phenomenology · Physics 2008-11-26 R. K. Ellis , D. A. Ross , S. Veseli

We present the new developments in the physics of XYZ mesons and glueballs and discuss the connection between properties of the $XYZ$ mesons and glueballs, and the structure of the QCD vacuum. It is shown that the mixing between quark and…

High Energy Physics - Phenomenology · Physics 2017-02-13 Nikolai Kochelev

We consider the real emission QCD correction to heavy Higgs boson production via weak boson fusion in high energy $pp$ collisions. The ${\cal O}(\alpha_s)$ corrections are determined for the complete electroweak $q q \rightarrow q q W^+…

High Energy Physics - Phenomenology · Physics 2009-10-22 A. Duff , D. Zeppenfeld

The perturbative renormalization group for light-front QCD Hamiltonian produces a logarithmically rising interquark potential already in second order, when all gluons are neglected. There is a question if this approach produces also color…

High Energy Physics - Phenomenology · Physics 2009-11-07 Jakub Narebski

The contribution of the hadronic continuum in the QCD sum rule calculation of the parameters entering in pseudoscalar meson mixing is evaluated by making use of simple integration kernels tailored in order to practically eliminate the…

High Energy Physics - Phenomenology · Physics 2020-02-05 N. F. Nasrallah

At the precision reached in current lattice QCD calculations, electromagnetic effects are becoming numerically relevant. Here, electromagnetic effects are included by superimposing $\mathrm{U}(1)$ degrees of freedom on $N_f = 2+1$ QCD…

We present two new extractions of the QCD coupling constant at the Z pole, $\alpha_S(m_Z)$, from detailed comparisons of inclusive W and Z hadronic decays data to state-of-the-art perturbative Quantum Chromodynamics calculations at…

High Energy Physics - Phenomenology · Physics 2020-05-12 David d'Enterria , Villads Jacobsen

In this paper we present two machine learning algorithms to identify $D$ mesons produced in a color singlet state from radiative $W$ boson decays at the LHC. The combined network algorithm is able to identify $D$ mesons via its hadronic…

High Energy Physics - Phenomenology · Physics 2023-10-24 E. Bakos , N. de Groot , N. Vranjes

Various exclusive and inclusive decays of B mesons are studied, at present, with dedicated experiments at ``B factories''. In order to compete with the experimental accuracy, we need a reliable theoretical framework to compute strong…

Nuclear Theory · Physics 2009-11-10 Thorsten Feldmann

Theoretical predictions for the $D^0\overline{D^0}$ mixing parameters fall significantly short of experimental measurements, with discrepancies spanning several orders of magnitude. This gap is mainly due to the Glashow-Iliopoulos-Maiani…

High Energy Physics - Phenomenology · Physics 2025-08-25 Lovro Dulibić , Blaženka Melić , Alexey A. Petrov
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