Single-top hadroproduction in association with a<i>W</i>boson

Frixione, Stefano; Laenen, Eric; Motylinski, Patrick; White, Chris D.; Webber, B.R.

doi:10.1088/1126-6708/2008/07/029

Cited by 473 publications

(469 citation statements)

References 45 publications

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“…Here we follow a different approach, that was first introduced in [61] and has already been employed and discussed in both implementations, POWHEG [18,19,62] and MC@NLO [16,63]. In this way we avoid having to introduce the spin correlation matrices, but we nevertheless recover the exact leading-order spin correlations.…”

Section: Jhep01(2012)137mentioning

confidence: 99%

Hadronic top-quark pair-production with one jet and parton showering

Alioli

Moch

Uwer

2012

J. High Energ. Phys.

135

137

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We present a calculation of heavy-flavor production in hadronic collisions in association with one jet matched to parton shower Monte Carlo programs at next-toleading order in perturbative QCD. Top-quark decays are included and spin correlations in the decay products are taken into account. The calculation builds on existing results for the radiative corrections to heavy-quark plus one jet production and uses the POWHEG BOX for the interface to the parton shower programs PYTHIA or HERWIG. A broad phenomenological study for the Large Hadron Collider and the Tevatron is presented. In particular we study -as one important sample application -the impact of the parton shower on the top-quark charge asymmetry.

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Section: Jhep01(2012)137mentioning

confidence: 99%

Hadronic top-quark pair-production with one jet and parton showering

Alioli

Moch

Uwer

2012

J. High Energ. Phys.

135

137

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“…This contribution is modeled with MC@NLO v4.01 [52][53][54] using the CT10 PDF set [55] and normalized to the approximate NNLO theoretical cross section [56].…”

Section: A Dilepton Channelmentioning

confidence: 99%

“…The normalization of the W þ jets background and its heavy-flavor content are extracted from data by a method exploiting the W þ jets production charge asymmetry [59]. Single top quark s-channel and Wtchannel production is generated using MC@NLO, where the diagram removal scheme is invoked in the Wt-channel production to avoid overlap between single top quark and tt final states [69]. For the t channel, ACERMC [70] with PYTHIA parton shower and modified LO PDFs (MRST LO** [71]) is used.…”

Section: B Single-lepton Channelmentioning

confidence: 99%

Measurements of spin correlation in top-antitop quark events from proton-proton collisions ats=7 TeVusing the ATLAS detector

Aad¹,

Abbott²,

Abdallah³

et al. 2014

Phys. Rev. D

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Measurements of spin correlation in top quark pair production are presented using data collected with the ATLAS detector at the LHC with proton-proton collisions at a center-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 4.6 fb −1 . Events are selected in final states with two charged leptons and at least two jets and in final states with one charged lepton and at least four jets. Four different observables sensitive to different properties of the top quark pair production mechanism are used to extract the correlation between the top and antitop quark spins. Some of these observables are measured for the first time. The measurements are in good agreement with the Standard Model prediction at next-to-leadingorder accuracy.

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“…Single-top events from the W t and s-channel processes are generated using mc@nlo v4.01 [39,40] interfaced to herwig and jimmy with cross sections of 15.7 ± 1.2 pb [41] and 4.6 ± 0.2 pb [42], respectively. The ct10 PDF set is used.…”

Section: Simulated Event Samplesmentioning

confidence: 99%

“…It has been calculated at NNLO in QCD including resummation of nextto-next-to-leading logarithmic (NNLL) soft gluon terms with top++2.0 [32][33][34][35][36][37]. Samples of tt events generated with acermc v3.8 [38] interfaced to pythia are also considered for systematic uncertainty studies.Single-top events from the W t and s-channel processes are generated using mc@nlo v4.01 [39,40] interfaced to herwig and jimmy with cross sections of 15.7 ± 1.2 pb [41] and 4.6 ± 0.2 pb [42], respectively. The ct10 PDF set is used.…”

mentioning

confidence: 99%

Measurement of the W W + W Z cross section and limits on anomalous triple gauge couplings using final states with one lepton, missing transverse momentum, and two jets with the ATLAS detector at s = 7 $$ \sqrt{s}=7 $$ TeV

Aad¹,

Abbott²,

Abdallah³

et al. 2015

J. High Energ. Phys.

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The production of a W boson decaying to eν or µν in association with a W or Z boson decaying to two jets is studied using 4.6 fb −1 of proton-proton collision data at √ s = 7 TeV recorded with the ATLAS detector at the LHC. The combined W W +W Z cross section is measured with a significance of 3.4σ and is found to be 68±7 (stat.)±19 (syst.) pb, in agreement with the Standard Model expectation of 61.1±2.2 pb. The distribution of the transverse momentum of the dijet system is used to set limits on anomalous contributions to the triple gauge coupling vertices and on parameters of an effective-field-theory model. The ATLAS collaboration 26 IntroductionThe study of vector boson pair production at the Large Hadron Collider (LHC) provides an important test of the electroweak sector of the Standard Model (SM) at the highest available energies. Deviations observed in the total or differential cross sections from the SM predictions may arise from anomalous triple gauge boson interactions [1] or from new particles decaying into vector bosons [2]. Vector boson pair production is also an important source of background in studies of the Higgs boson and in searches for signals of physics beyond the SM. The cross sections for W W and W Z production at the LHC have previously been measured in fully leptonic final states [3][4][5][6]. The semileptonic final states suffer from larger backgrounds from W or Z boson production in association with jets, but benefit from significantly larger branching fractions than the fully leptonic states and thus represent important complementary measurements. In this paper the W W + W Z cross section is -1 -JHEP01(2015)049 measured in the νjj ( = e, µ) final state using a data sample of proton-proton (pp) collisions with an integrated luminosity of 4.6 fb −1 collected by the ATLAS detector at the LHC. In addition, the reconstructed dijet transverse momentum distribution is used to set limits on anomalous contributions to the triple gauge coupling vertices (aTGCs), after requiring that the dijet invariant mass is close to the mass of the W or Z boson.The combined W W +W Z production cross section (hereafter, W V cross section, where V = W, Z) has been measured in the νjj final state in proton-antiproton collisions at the Tevatron collider by both the CDF [7] and D0 [8] collaborations, and more recently in pp collisions by the CMS [9] collaboration. Limits on anomalous triple gauge couplings in W V → νjj production have also been presented by CDF [10], D0 [11], and CMS [9]. This paper is organised as follows. The overall analysis strategy is described in section 2 and a short description of the ATLAS detector is given in section 3. The Monte Carlo (MC) simulation used for the signal and background modelling is summarized in section 4. Details of the object and event reconstruction and of the event selection are given in sections 5 and 6 respectively. The method to estimate the signal and background processes is discussed in section 7. The cross section measurement is detailed in section...

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Single-top hadroproduction in association with aWboson

Cited by 473 publications

References 45 publications

Hadronic top-quark pair-production with one jet and parton showering

Hadronic top-quark pair-production with one jet and parton showering

Measurements of spin correlation in top-antitop quark events from proton-proton collisions ats=7 TeVusing the ATLAS detector

Measurement of the W W + W Z cross section and limits on anomalous triple gauge couplings using final states with one lepton, missing transverse momentum, and two jets with the ATLAS detector at s = 7 $$ \sqrt{s}=7 $$ TeV

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