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ČeštinaEnglish

W? production and limits on anomalous WW? couplings in pp? collisions

Result description

We measure the cross section and the difference in rapidities between photons and charged leptons for inclusive W -> lnu+gamma production in egamma and mugamma final states. Using data corresponding to an integrated luminosity of 4.2 fb-1 collected withthe D0 detector at the Fermilab Tevatron Collider, the cross section multiplied by the branching fraction for the process ppbar -> Wgamma+X -> lnugamma+X, measured to be 15.8 +/- 0.8 (stat.) +/- 1.2 (syst.) pb, and the distribution of the charge-signed photon-lepton rapidity difference are found to be in agreement with the standard model. These results provide the most stringent limits on anomalous WWgamma couplings for data from hadron colliders: -0.4 < Delta kappa_gamma < 0.4 and -0.08 < lambda_gamma< 0.07 at the 95% C.L.

Keywords

hadroproductionleptonic decayanti-p p interactionassociated productionD0photon leptonfinal state

The result's identifiers

Alternative languages

  • Result language

    angličtina

  • Original language name

    W? production and limits on anomalous WW? couplings in pp? collisions

  • Original language description

    We measure the cross section and the difference in rapidities between photons and charged leptons for inclusive W -> lnu+gamma production in egamma and mugamma final states. Using data corresponding to an integrated luminosity of 4.2 fb-1 collected withthe D0 detector at the Fermilab Tevatron Collider, the cross section multiplied by the branching fraction for the process ppbar -> Wgamma+X -> lnugamma+X, measured to be 15.8 +/- 0.8 (stat.) +/- 1.2 (syst.) pb, and the distribution of the charge-signed photon-lepton rapidity difference are found to be in agreement with the standard model. These results provide the most stringent limits on anomalous WWgamma couplings for data from hadron colliders: -0.4 < Delta kappa_gamma < 0.4 and -0.08 < lambda_gamma< 0.07 at the 95% C.L.

  • Czech name

    —

  • Czech description

    —

Classification

  • Type

    Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    BF - Elementary particle theory and high energy physics

  • OECD FORD branch

    —

Result continuities

Others

  • Publication year

    2011

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Physical Review Letters

  • ISSN

    0031-9007

  • e-ISSN

    —

  • Volume of the periodical

    107

  • Issue of the periodical within the volume

    24

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    7

  • Pages from-to

    "241803-1"-"241803-7"

  • UT code for WoS article

    000297939300004

  • EID of the result in the Scopus database

    —

Basic information

Result type

Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

Jx

CEP

BF - Elementary particle theory and high energy physics

Year of implementation

2011

Similar results(10)

W gamma Production and Limits on Anomalous WW gamma Couplings in p(p)over-bar Collisions at sqrt(s)=1.96 TeVW gamma Production and Limits on Anomalous WW gamma Couplings in p(p)over-bar Collisions at root s=1.96 TeVMeasurement of the t anti-t production cross section in p anti-p collisions at s**(1/2) = 1.96 TeV using secondary vertex b tagging