Massive Lepton-Pair Production in Hadron-Hadron Collisions at High Energies

Drell, Sidney D.; Yan, Tung-Mow

doi:10.1103/physrevlett.25.316

Cited by 1,199 publications

(731 citation statements)

References 11 publications

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“…Although our goal, namely the calculation of the NLO QCD corrections, would be quite independent of the value of the contact interaction scale Λ, for definiteness we choose Λ = 6 (20) TeV for the Tevatron (LHC). Furthermore, in presenting our results, we shall consider only one of the couplings η q AB and ξ q AB to be non-zero and of unit strength.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

NLO corrections to lepton pair production beyond the Standard Model at hadron colliders

Choudhury¹,

Majhi²,

Ravindran³

2006

J. High Energy Phys.

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We consider lepton pair production at a hadron collider in a class of effective theories with the relevant operators being four-fermion contact interaction. Despite the nonrenormalizable nature of the interaction, we explicitly demonstrate that calculating QCD corrections is both possible and meaningful. Calculating the corrections for various differential distributions, we show that these can be substantial and significantly different from those within the SM. Furthermore, the corrections have a very distinctive flavour dependence. And finally, the scale dependence of the cross sections are greatly reduced once the NLO corrections are taken into account.

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Section: Resultsmentioning

confidence: 99%

“…Some of the best constraints on compositeness, for example, came from the OPAL [18] and CDF [19] experiments. More recently the measurement of the Drell-Yan cross section [20] at high invariant masses set the most stringent limits on contact interactions of the type given in eqn. (1.1).…”

Section: Introductionmentioning

confidence: 99%

NLO corrections to lepton pair production beyond the Standard Model at hadron colliders

Choudhury¹,

Majhi²,

Ravindran³

2006

J. High Energy Phys.

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“…At 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).…”

Section: Introductionmentioning

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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“…[17] QCD resummation [18] can be used to define parameters to describe p T (W ) in the low p T (W ) region relevant to measuring the W mass. These parameters are determined or checked by measuring p T (Z).…”

Section: Methods Of Measurementmentioning

confidence: 99%

Experimental Tests of the Standard Model

Nodulman

1999

Techniques and Concepts of High Energy Physics X

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Massive Lepton-Pair Production in Hadron-Hadron Collisions at High Energies

Cited by 1,199 publications

References 11 publications

NLO corrections to lepton pair production beyond the Standard Model at hadron colliders

NLO corrections to lepton pair production beyond the Standard Model at hadron colliders

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

Experimental Tests of the Standard Model

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