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Measurements of differential and double-differential cross sections of top quark pair ($\text{t}\overline{\text{t}}$) production are presented in the lepton+jets channels with a single electron or muon and jets in the final state. The…

High Energy Physics - Experiment · Physics 2021-12-02 CMS Collaboration

We report the results on the search for exclusive production of $W$ pairs in the LHC with data collected by the Compact Muon Solenoid detector in proton-proton collisions at $\sqrt{s}$ = 7 TeV. The analysis comprises the two-photon…

High Energy Physics - Experiment · Physics 2019-08-13 Gustavo G. da Silveira

The elastic production of top quark pairs in $pp$ collisions at low and high luminosity regimes is investigated in detail. We extend the study performed in Phys. Rev. D102, 074014 (2020) which has demonstrated that the sum of two…

High Energy Physics - Phenomenology · Physics 2022-06-15 Daniel E. Martins , Marek Tasevsky , Victor P. Goncalves

Measurements at $\sqrt{s}$ = 13.6 TeV of the opposite-sign W boson pair production cross section in proton-proton collisions are presented. The data used in this study were collected with the CMS detector at the CERN LHC in 2022, and…

High Energy Physics - Experiment · Physics 2025-01-10 CMS Collaboration

Precision tests of the Standard Model in the Strong and Electroweak sectors play an important role, among the physics goals of LHC experiments. Because of the nature of proton-proton processes, observables based on the measurement of the…

High Energy Physics - Phenomenology · Physics 2017-03-08 E. Richter-Was , Z. Was

First measurements of the W -> lnu and Z/gamma* -> ll (l = e, mu) production cross sections in proton-proton collisions at sqrt(s) = 7 TeV are presented using data recorded by the ATLAS experiment at the LHC. The results are based on 2250 W…

High Energy Physics - Experiment · Physics 2012-08-27 The ATLAS Collaboration

We present the first study of the production of a Standard Model Higgs boson at a lepton collider in association with a pair of W bosons, $e^+_{} e^-_{} \to W^+_{} W^-_{} H$, in the inverse seesaw model. Taking into account all relevant…

High Energy Physics - Phenomenology · Physics 2018-10-05 Julien Baglio , Silvia Pascoli , Cedric Weiland

Fiducial and differential measurements of $W^+W^-$ production in events with at least one hadronic jet are presented. These cross-section measurements are sensitive to the properties of electroweak-boson self-interactions and provide a test…

High Energy Physics - Experiment · Physics 2021-09-01 ATLAS Collaboration

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…

High Energy Physics - Phenomenology · Physics 2016-09-01 U. Baur , T. Han , J. Ohnemus

We present novel predictions for the production of $W^+W^-$ pairs in hadron collisions that are next-to-next-to-leading order accurate and consistently matched to a parton shower (NNLOPS). All diagrams that lead to the process $pp\to e^-…

High Energy Physics - Phenomenology · Physics 2019-01-30 Emanuele Re , Marius Wiesemann , Giulia Zanderighi

This paper reports a search for triboson $W^{\pm}W^{\pm}W^{\mp}$ production in two decay channels ($W^{\pm}W^{\pm}W^{\mp}\rightarrow \ell^{\pm}\nu\ell^{\pm}\nu\ell^{\mp}\nu$ and $W^{\pm}W^{\pm}W^{\mp}\rightarrow…

High Energy Physics - Experiment · Physics 2017-03-20 ATLAS Collaboration

We report the first observation of Z/gamma* production in Compton scattering of quasi-real photons. This is a subprocess of the reaction e+e- to e+e-Z/gamma*, where one of the final state electrons is undetected. Approximately 55 pb-1 of…

High Energy Physics - Experiment · Physics 2008-11-26 OPAL Collaboration , G. Abbiendi et al

The programs WPHACT and WTO, which are designed for computing cross sections and other relevant observables in the $e^+e^-$ annihilation into four fermions, are used to make detailed and complete predictions for the semi-leptonic and fully…

High Energy Physics - Phenomenology · Physics 2009-10-28 Elena Accomando , Alessandro Ballestrero , Giampiero Passarino

The production of $W^{\pm}Z$ events in proton--proton collisions at a centre-of-mass energy of 13 TeV is measured with the ATLAS detector at the LHC. The collected data correspond to an integrated luminosity of 3.2 fb$^{-1}$. The $W^{\pm}Z$…

High Energy Physics - Experiment · Physics 2016-09-26 ATLAS Collaboration

A measurement is presented of the exclusive and semi-exclusive production of charged pion pairs in proton-proton collisions, pp to p(p*) + $\pi^+\pi^-$ + p(p*) here the $\pi^+\pi^-$ pair is emitted at central rapidities, and the scattered…

High Energy Physics - Experiment · Physics 2020-04-03 CMS Collaboration

We study the Central Exclusive Production (CEP) of chi_cJ and eta_c mesons at RHIC in proton-proton collisions. We consider the chi_cJ --> J/psi + gamma decay channels and, recalling that the J_z=0 suppression of the J=1,2 states can be…

High Energy Physics - Phenomenology · Physics 2011-03-28 L. A. Harland-Lang , V. A. Khoze , M. G. Ryskin , W. J. Stirling

A search for Higgs boson production in association with a $W$ or $Z$ boson, in the $H \rightarrow WW^{\ast}$ decay channel, is performed with a data sample collected with the ATLAS detector at the LHC in proton-proton collisions at…

High Energy Physics - Experiment · Physics 2015-09-15 ATLAS Collaboration

The potential of LHC for investigation of the $W$-$t$-$b$ vertex through the $tW$ channel of single top quark production is studied. Unlike the other two single top quark production processes ($t-$channel and $s-$channel), the $tW$ channel…

High Energy Physics - Phenomenology · Physics 2009-01-06 Mojtaba Mohammadi Najafabadi

QCD predicts soft radiation patterns that are particularly simple for $W+ {jet}$ production. We demonstrate how these patterns can be used to distinguish between the parton-level subprocesses probabilistically on an event-by-event basis. As…

High Energy Physics - Phenomenology · Physics 2009-10-30 James Amundson , Jon Pumplin , Carl Schmidt

Same-sign $W$ boson pairs production is a promising channel to look for signatures of double parton interactions at the LHC. The corresponding cross section has been calculated by using double parton distribution functions, encoding two…

High Energy Physics - Phenomenology · Physics 2017-07-05 Federico Alberto Ceccopieri , Matteo Rinaldi , Sergio Scopetta