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We report on the calculation of the next-to-leading order QCD corrections to the production of W-boson pairs in association with a hard jet at the Tevatron and the LHC, which is an important source of background for Higgs and new-physics…

高能物理 - 唯象学 · 物理学 2010-01-15 Stefan Dittmaier , Stefan Kallweit , Peter Uwer

The start of the physics program at the LHC has added great impetus in the development of powerful theoretical tools to meet the many challenges that this collider brings. The production of jets and weak vector bosons is at the center of…

高能物理 - 唯象学 · 物理学 2010-03-24 Fernando Febres Cordero

This paper explores the effects of finite width in processes of pair production of an extra heavy quark with charge 2/3 (top partner) and its subsequent decay into a bosonic Dark Matter (DM) candidate -- either scalar or vector -- and SM…

高能物理 - 唯象学 · 物理学 2017-10-09 Stefano Moretti , Dermot O'Brien , Luca Panizzi , Hugo Prager

The successful LHC operation suggests going beyond the search of excess of events for the quest of new physics. We demonstrate that the eight multipole parameters describing the spin state of the W or Z bosons are able to disentangle their…

高能物理 - 唯象学 · 物理学 2017-11-15 J. Bernabeu , A. Segarra

With the advent of the LHC, it is important to devise clear tests for Physics Beyond the Standard Model. Such physics could manifest itself in the form of new charged bosons, whose presence is most naturally occurring in left-right…

高能物理 - 唯象学 · 物理学 2015-03-17 Mariana Frank , Alper Hayreter , Ismail Turan

The process $p\,\pbar \rightarrow W^{\pm}Z + X \rightarrow \ell^\pm_1 \nu_1 \ell_2^+ \ell_2^- + X$ is calculated to ${\cal O}(\alpha_s)$ for general $C$ and $P$ conserving $WWZ$ couplings. At the Tevatron center of mass energy, the QCD…

高能物理 - 唯象学 · 物理学 2016-09-01 U. Baur , T. Han , J. Ohnemus

We investigate the discovery potential of light color-octet bosons in the mass range of 100 - 400 GeV in exclusive top-pair plus jet production at the LHC. We study the impact of such bosons on the incline, the energy and the rapidity…

高能物理 - 唯象学 · 物理学 2015-06-19 Stefan Alte , Stefan Berge , Hubert Spiesberger

I review here the latest measurements related to vector boson production in association with light or heavy flavor jets at the Tevatron and at the LHC. The methods to estimate the W+jets and Z+jets background in top-quark analyses are also…

高能物理 - 实验 · 物理学 2019-08-15 Frédéric Déliot

We compute the rate for diffractive upsilon meson production at the Tevatron and the LHC. The upsilon is produced diffractively via the subprocess gamma + p -> upsilon + p where the initial photon is radiated off an incoming proton (or…

高能物理 - 唯象学 · 物理学 2009-08-05 B. E. Cox , J. R. Forshaw , R. Sandapen

Triple gauge boson associated production at the LHC serves as an interesting channel to test the robustness of the Standard Model. Any deviation from its SM prediction may indicate possible existence of relevant new physics, e.g., anomalous…

高能物理 - 唯象学 · 物理学 2015-06-12 Daneng Yang , Yajun Mao , Qiang Li , Shuai Liu , Zijun Xu , Ke Ye

We have investigated the single and double diffractive production of dileptons and photons in ultra-peripheral collisions at the Large Hadron Collider (LHC). Utilizing advanced theoretical models that integrate quantum electrodynamics (QED)…

高能物理 - 唯象学 · 物理学 2024-05-28 Gongming Yu , Rabia Hameed , Liyuan Hu , Qiang Hu

The ATLAS collaboration (and also CMS) has recently reported an excess over Standard Model expectations for gauge boson pair production in the invariant mass region $1.8-2.2$ TeV. In the light of these results, we argue that such signal…

高能物理 - 唯象学 · 物理学 2016-01-27 D. Aristizabal Sierra , J. Herrero-Garcia , D. Restrepo , A. Vicente

I present results from recent high-order calculations for the production of electroweak bosons and top quarks. In particular, I discuss $W$ and $Z$ boson production at large transverse momentum, single-top production, and FCNC top…

高能物理 - 唯象学 · 物理学 2023-02-21 Nikolaos Kidonakis

The double-radiative process e+e- -> Z gamma gamma -> q q~ gamma gamma, where the two hard photons escape detection at low polar angles into opposite directions, is studied in 0.62/fb of data collected with the L3 detector at LEP at…

高能物理 - 实验 · 物理学 2012-08-27 L3 Collaboration

We provide predictions for the rapidity distributions of exclusive photoproduced J/psi and Upsilon mesons, and Z^0 bosons, at the Tevatron and LHC. We use the equivalent-photon approximation with the photon-proton cross sections given by…

高能物理 - 唯象学 · 物理学 2008-11-26 L. Motyka , G. Watt

In this presentation an account of the multi-lepton (electrons and muons) anomalies at the LHC is given. These include the excess production of opposite sign leptons with and without b-quarks, including a corner of the phase-space with a…

高能物理 - 唯象学 · 物理学 2021-09-09 Bruce Mellado

I present an overview of the measurements of the di-boson (WW, WZ, ZZ, W\gamma, and Z\gamma) production cross sections in proton-proton collisions at \sqrt{s} = 7 TeV. The measurements are based on 36 pb^-1 and 1.1 fb^-1 of data collected…

高能物理 - 实验 · 物理学 2019-08-13 Kalanand Mishra

This paper explores the effects of both finite width and interference (with background) in the pair production and decay of extra heavy quarks with charge 2/3 at the Large Hadron Collider (LHC). This dynamics is normally ignored in standard…

高能物理 - 唯象学 · 物理学 2017-11-01 Stefano Moretti , Dermot O'Brien , Luca Panizzi , Hugo Prager

At the Large Hadron Collider, the $WbWb$ final state is expected to be dominated by $t\bar{t}$ production with a contribution from single-top processes. Differential cross-sections for $WbWb$ production in the dilepton decay channel are…

高能物理 - 实验 · 物理学 2025-06-18 ATLAS Collaboration

We present a phenomenology study on central exclusive production of $W^+W^-$ boson pairs in proton-proton collisions at the Large Hadron Collider at 14 TeV using the forward proton detectors, such as the ATLAS Forward Proton or the…

高能物理 - 唯象学 · 物理学 2021-02-03 C. Baldenegro , G. Biagi , G. Legras , C. Royon