Measurement of angular correlations in Drell–Yan lepton pairs to probe Z/γ boson transverse momentum at √s=7 TeV with the ATLAS detector

ATLAS Collaboration

    Research output: Contribution to journalArticle

    33 Citations (Scopus)

    Abstract

    A measurement of angular correlations in Drell–Yan lepton pairs via the ϕη observable is presented. This variable probes the same physics as the Z/γ boson transverse momentum with a better experimental resolution. The Z/γ→e+e and Z/γ→μ+μ decays produced in proton–proton collisions at a centre-of-mass energy of sqrts=7 TeV are used. The data were collected with the ATLAS detector at the LHC and correspond to an integrated luminosity of 4.6 fb−1. Normalised differential cross sections as a function of ϕη are measured separately for electron and muon decay channels. These channels are then combined for improved accuracy. The cross section is also measured double differentially as a function of ϕη for three independent bins of the Z boson rapidity. The results are compared to QCD calculations and to predictions from different Monte Carlo event generators. The data are reasonably well described, in all measured Z boson rapidity regions, by resummed QCD predictions combined with fixed-order perturbative QCD calculations or by some Monte Carlo event generators. The measurement precision is typically better by one order of magnitude than present theoretical uncertainties.

    Original languageEnglish
    Pages (from-to)32-51
    Number of pages20
    JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
    Volume720
    Issue number1-3
    DOIs
    Publication statusPublished - 2013 Mar 13

    Fingerprint

    angular correlation
    transverse momentum
    leptons
    bosons
    quantum chromodynamics
    probes
    detectors
    generators
    cross sections
    decay
    predictions
    center of mass
    muons
    luminosity
    physics
    collisions
    electrons
    energy

    Keywords

    • Differential cross section
    • Event generators
    • Monte Carlo models
    • Perturbative QCD
    • Z boson

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

    Cite this

    @article{4a03844b82794309a67a20b5b45e70f8,
    title = "Measurement of angular correlations in Drell–Yan lepton pairs to probe Z/γ⁎ boson transverse momentum at √s=7 TeV with the ATLAS detector",
    abstract = "A measurement of angular correlations in Drell–Yan lepton pairs via the ϕη ⁎ observable is presented. This variable probes the same physics as the Z/γ⁎ boson transverse momentum with a better experimental resolution. The Z/γ⁎→e+e− and Z/γ⁎→μ+μ− decays produced in proton–proton collisions at a centre-of-mass energy of sqrts=7 TeV are used. The data were collected with the ATLAS detector at the LHC and correspond to an integrated luminosity of 4.6 fb−1. Normalised differential cross sections as a function of ϕη ⁎ are measured separately for electron and muon decay channels. These channels are then combined for improved accuracy. The cross section is also measured double differentially as a function of ϕη ⁎ for three independent bins of the Z boson rapidity. The results are compared to QCD calculations and to predictions from different Monte Carlo event generators. The data are reasonably well described, in all measured Z boson rapidity regions, by resummed QCD predictions combined with fixed-order perturbative QCD calculations or by some Monte Carlo event generators. The measurement precision is typically better by one order of magnitude than present theoretical uncertainties.",
    keywords = "Differential cross section, Event generators, Monte Carlo models, Perturbative QCD, Z boson",
    author = "{ATLAS Collaboration} and G. Aad and T. Abajyan and B. Abbott and J. Abdallah and {Abdel Khalek}, S. and Abdelalim, {A. A.} and O. Abdinov and R. Aben and B. Abi and M. Abolins and AbouZeid, {O. S.} and H. Abramowicz and H. Abreu and Acharya, {B. S.} and L. Adamczyk and Adams, {D. L.} and Addy, {T. N.} and J. Adelman and S. Adomeit and P. Adragna and T. Adye and S. Aefsky and Aguilar-Saavedra, {J. A.} and M. Agustoni and Ahlen, {S. P.} and F. Ahles and A. Ahmad and M. Ahsan and G. Aielli and {\AA}kesson, {T. P.A.} and G. Akimoto and Akimov, {A. V.} and Alam, {M. A.} and J. Albert and S. Albrand and M. Aleksa and Aleksandrov, {I. N.} and F. Alessandria and C. Alexa and G. Alexander and G. Alexandre and T. Alexopoulos and M. Alhroob and M. Aliev and G. Alimonti and J. Alison and Allbrooke, {B. M.M.} and Allison, {L. J.} and Allport, {P. P.} and Kohei Yorita",
    year = "2013",
    month = "3",
    day = "13",
    doi = "10.1016/j.physletb.2013.01.054",
    language = "English",
    volume = "720",
    pages = "32--51",
    journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
    issn = "0370-2693",
    publisher = "Elsevier",
    number = "1-3",

    }

    TY - JOUR

    T1 - Measurement of angular correlations in Drell–Yan lepton pairs to probe Z/γ⁎ boson transverse momentum at √s=7 TeV with the ATLAS detector

    AU - ATLAS Collaboration

    AU - Aad, G.

    AU - Abajyan, T.

    AU - Abbott, B.

    AU - Abdallah, J.

    AU - Abdel Khalek, S.

    AU - Abdelalim, A. A.

    AU - Abdinov, O.

    AU - Aben, R.

    AU - Abi, B.

    AU - Abolins, M.

    AU - AbouZeid, O. S.

    AU - Abramowicz, H.

    AU - Abreu, H.

    AU - Acharya, B. S.

    AU - Adamczyk, L.

    AU - Adams, D. L.

    AU - Addy, T. N.

    AU - Adelman, J.

    AU - Adomeit, S.

    AU - Adragna, P.

    AU - Adye, T.

    AU - Aefsky, S.

    AU - Aguilar-Saavedra, J. A.

    AU - Agustoni, M.

    AU - Ahlen, S. P.

    AU - Ahles, F.

    AU - Ahmad, A.

    AU - Ahsan, M.

    AU - Aielli, G.

    AU - Åkesson, T. P.A.

    AU - Akimoto, G.

    AU - Akimov, A. V.

    AU - Alam, M. A.

    AU - Albert, J.

    AU - Albrand, S.

    AU - Aleksa, M.

    AU - Aleksandrov, I. N.

    AU - Alessandria, F.

    AU - Alexa, C.

    AU - Alexander, G.

    AU - Alexandre, G.

    AU - Alexopoulos, T.

    AU - Alhroob, M.

    AU - Aliev, M.

    AU - Alimonti, G.

    AU - Alison, J.

    AU - Allbrooke, B. M.M.

    AU - Allison, L. J.

    AU - Allport, P. P.

    AU - Yorita, Kohei

    PY - 2013/3/13

    Y1 - 2013/3/13

    N2 - A measurement of angular correlations in Drell–Yan lepton pairs via the ϕη ⁎ observable is presented. This variable probes the same physics as the Z/γ⁎ boson transverse momentum with a better experimental resolution. The Z/γ⁎→e+e− and Z/γ⁎→μ+μ− decays produced in proton–proton collisions at a centre-of-mass energy of sqrts=7 TeV are used. The data were collected with the ATLAS detector at the LHC and correspond to an integrated luminosity of 4.6 fb−1. Normalised differential cross sections as a function of ϕη ⁎ are measured separately for electron and muon decay channels. These channels are then combined for improved accuracy. The cross section is also measured double differentially as a function of ϕη ⁎ for three independent bins of the Z boson rapidity. The results are compared to QCD calculations and to predictions from different Monte Carlo event generators. The data are reasonably well described, in all measured Z boson rapidity regions, by resummed QCD predictions combined with fixed-order perturbative QCD calculations or by some Monte Carlo event generators. The measurement precision is typically better by one order of magnitude than present theoretical uncertainties.

    AB - A measurement of angular correlations in Drell–Yan lepton pairs via the ϕη ⁎ observable is presented. This variable probes the same physics as the Z/γ⁎ boson transverse momentum with a better experimental resolution. The Z/γ⁎→e+e− and Z/γ⁎→μ+μ− decays produced in proton–proton collisions at a centre-of-mass energy of sqrts=7 TeV are used. The data were collected with the ATLAS detector at the LHC and correspond to an integrated luminosity of 4.6 fb−1. Normalised differential cross sections as a function of ϕη ⁎ are measured separately for electron and muon decay channels. These channels are then combined for improved accuracy. The cross section is also measured double differentially as a function of ϕη ⁎ for three independent bins of the Z boson rapidity. The results are compared to QCD calculations and to predictions from different Monte Carlo event generators. The data are reasonably well described, in all measured Z boson rapidity regions, by resummed QCD predictions combined with fixed-order perturbative QCD calculations or by some Monte Carlo event generators. The measurement precision is typically better by one order of magnitude than present theoretical uncertainties.

    KW - Differential cross section

    KW - Event generators

    KW - Monte Carlo models

    KW - Perturbative QCD

    KW - Z boson

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    UR - http://www.scopus.com/inward/citedby.url?scp=85042024303&partnerID=8YFLogxK

    U2 - 10.1016/j.physletb.2013.01.054

    DO - 10.1016/j.physletb.2013.01.054

    M3 - Article

    VL - 720

    SP - 32

    EP - 51

    JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

    JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

    SN - 0370-2693

    IS - 1-3

    ER -