Combining QCD and electroweak corrections to dilepton production in the framework of the FEWZ simulation code

Li, Ye; Petriello, Frank

doi:10.1103/physrevd.86.094034

Cited by 388 publications

(371 citation statements)

References 58 publications

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“…Quantum chromodynamics (QCD) corrections modify the kinematic distributions of the Z boson; in particular, the Z boson acquires a nonzero component of momentum transverse to the beam: q T > 0. The FEWZ program calculates both QCD and QED corrections for the DY process [3]. However, it does not include mixed QCD and QED corrections; the required two-loop integrals are technically very challenging, and progress has been made only recently [4].…”

Section: Introductionmentioning

confidence: 99%

Study of final-state radiation in decays ofZbosons produced inppcollisions at 7 TeV

Khachatryan¹,

Sirunyan²,

Tumasyan³

et al. 2015

Phys. Rev. D

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The differential cross sections for the production of photons in Z → μ þ μ − γ decays are presented as a function of the transverse energy of the photon and its separation from the nearest muon. The data for these measurements are collected with the CMS detector and correspond to an integrated luminosity of 4.7 fb −1 of pp collisions at ffiffi ffi s p ¼ 7 TeV delivered by the CERN LHC. The cross sections are compared to simulations with POWHEG and PYTHIA, where PYTHIA is used to simulate parton showers and final-state photons. These simulations match the data to better than 5%.

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Section: Introductionmentioning

confidence: 99%

Study of final-state radiation in decays ofZbosons produced inppcollisions at 7 TeV

Khachatryan¹,

Sirunyan²,

Tumasyan³

et al. 2015

Phys. Rev. D

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“…To minimise model-dependent theoretical uncertainties, the cross-section is not extrapolated to the full phase space but is reported in a phase space only slightly extended with respect to the fiducial acceptance of the e + and e − . The results are compared to NNLO pQCD calculations with next-to-leading-order (NLO) electroweak corrections from the FEWZ 3.1 [10,11] framework and to the predictions from three event generators. …”

mentioning

confidence: 99%

Measurement of the high-mass Drell–Yan differential cross-section in pp collisions at s=7 TeV with the ATLAS detector

Aad¹,

Abajyan²,

Abbott³

et al. 2013

Physics Letters B

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This Letter reports a measurement of the high-mass Drell-Yan differential cross-section in proton-proton collisions at a centre-of-mass energy of 7 TeV at the LHC. Based on an integrated luminosity of 4.9 fb −1 , the differential cross-section in the Z /γ * → e + e − channel is measured with the ATLAS detector as a function of the invariant mass, m ee , in the range 116 < m ee < 1500 GeV, for a fiducial region in which both the electron and the positron have transverse momentum p T > 25 GeV and pseudorapidity |η| < 2.5.A comparison is made to various event generators and to the predictions of perturbative QCD calculations at next-to-next-to-leading order.© 2013 CERN. Published by Elsevier B.V. All rights reserved. IntroductionAt hadron colliders, the Drell-Yan (DY) process [1], proceeding at tree level via the s-channel exchange of a virtual photon or Z boson, can produce charged lepton pairs over a wide range of invariant mass. The differential cross-section as a function of the invariant mass is described by perturbative QCD (pQCD) calculations at next-to-next-to-leading order (NNLO). Given the simple experimental signature and the low backgrounds, a small experimental uncertainty can be achieved on the measured invariant mass distribution allowing for a precision test of pQCD. The mass spectrum is also sensitive to the parton distribution functions (PDFs), in particular to the poorly known distribution of antiquarks at large x [2], where x can be interpreted, at leading order, as the fraction of the proton momentum carried by the interacting parton. Additionally, the production of DY dilepton pairs is a source of background for other Standard Model (SM) measurements, and the mass spectrum may be modified by new physics phenomena giving rise to, e.g., narrow resonances or an excess of high-mass pairs inconsistent with the known PDFs.The differential cross-section for DY dilepton pair production in the high-mass range has been reported previously by the CMS [3], CDF [4] and D0 [5] Collaborations. With the ATLAS detector, total and differential cross-sections in a mass window of 66-116 GeV have been measured using the 2010 dataset [6]. In addition, searches for new physics in the high-mass range have been performed [7][8][9] and no deviations from the SM expectation were observed. This Letter reports an extension of these previous ✩ © CERN for the benefit of the ATLAS Collaboration.E-mail address: atlas.publications@cern.ch.analyses by providing a measurement of the DY cross-section, fully corrected for detector effects, in the dielectron channel as a function of the e + e − invariant mass, m ee , up to 1500 GeV. To minimise model-dependent theoretical uncertainties, the cross-section is not extrapolated to the full phase space but is reported in a phase space only slightly extended with respect to the fiducial acceptance of the e + and e − . The results are compared to NNLO pQCD calculations with next-to-leading-order (NLO) electroweak corrections from the FEWZ 3.1 [10,11] framework and to the predictions from ...

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“…The results reported in this article are compared to fixed-order predictions calculated within perturbative quantum chromodynamics (pQCD) determined using the FEWZ 3.1 generator [24] at O(α 2 s ), where α s is the coupling strength of the strong force. These predictions do not include electroweak corrections.…”

Section: Jhep09(2016)136mentioning

confidence: 99%

Measurement of the forward Z boson production cross-section in pp collisions at s = 13 $$ \sqrt{s}=13 $$ TeV

Aaij

Adeva

Adinolfi

et al. 2016

J. High Energ. Phys.

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A measurement of the production cross-section of Z bosons in pp collisions at √ s = 13 TeV is presented using dimuon and dielectron final states in LHCb data. The crosssection is measured for leptons with pseudorapidities in the range 2.0 < η < 4.5, transverse momenta p T > 20 GeV and dilepton invariant mass in the range 60 < m( ) < 120 GeV. The integrated cross-section from averaging the two final states is σ Z = 194.3 ± 0.9 ± 3.3 ± 7.6 pb, where the first uncertainty is statistical, the second is due to systematic effects, and the third is due to the luminosity determination. In addition, differential cross-sections are measured as functions of the Z boson rapidity, transverse momentum and the angular variable φ * η .

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Combining QCD and electroweak corrections to dilepton production in the framework of the FEWZ simulation code

Cited by 388 publications

References 58 publications

Study of final-state radiation in decays ofZbosons produced inppcollisions at 7 TeV

Study of final-state radiation in decays ofZbosons produced inppcollisions at 7 TeV

Measurement of the high-mass Drell–Yan differential cross-section in pp collisions at s=7 TeV with the ATLAS detector

Measurement of the forward Z boson production cross-section in pp collisions at s = 13 $$ \sqrt{s}=13 $$ TeV

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