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Measurements of differential and double-differential Drell-Yan cross sections in proton-proton collisions at 8 TeV

The CMS collaboration
Eur.Phys.J. C75 (2015) 147, 2015

Abstract (data abstract)
CERN-LHC. Measurements of the differential and double-differential Drell-Yan cross sections in the dielectron and dimuon channels are presented. They are based on proton-proton collision data at sqrt(s) = 8 TeV recorded with the CMS detector at the LHC and corresponding to an integrated luminosity of 19.7 inverse femtobarns. The measured inclusive cross section in the Z peak region (60-120 GeV), obtained from the combination of the dielectron and dimuon channels, is 1138 +/- 8 (exp) +/- 25 (theo) +/- 30 (lumi) pb, where the statistical uncertainty is negligible. The differential cross section d(sigma)/d(m) in the dilepton mass range 15 to 2000 GeV is measured and corrected to the full phase space. The double-differential cross section d2(sigma)/d(m)d(abs(y)) is also measured over the mass range 20 to 1500 GeV and absolute dilepton rapidity from 0 to 2.4. In addition, the ratios of the normalized differential cross sections measured at sqrt(s) = 7 and 8 TeV are presented. These measurements are compared to the predictions of perturbative QCD at next-to-leading and next-to-next-to-leading (NNLO) orders using various sets of parton distribution functions (PDFs). The results agree with the NNLO theoretical predictions computed with FEWZ 3.1 using the CT10 NNLO and NNPDF2.1 NNLO PDFs. The measured double-differential cross section and ratio of normalized differential cross sections are sufficiently precise to constrain the proton PDFs.

  • Table 1

    Data from Table 2

    10.17182/hepdata.69869.v1/t1

    Absolute Drell-Yan cross section measurements in the Z peak region (60 < m < 120 GeV). The uncertainties in the...

  • Table 2

    Data from Fig.3

    10.17182/hepdata.69869.v1/t2

    The Drell-Yan differential pre-FSR cross section D(SIG)/DM as measured in the combined dilepton channel for the full phase space. Theoretical...

  • Table 3

    Data from Fig.4

    10.17182/hepdata.69869.v1/t3

    The Drell-Yan pre-FSR dilepton rapidity distribution D(SIG)/DABS(YRAP) within the detector acceptance, for the mass bin 20-30 GeV, as measured in...

  • Table 4

    Data from Fig.4

    10.17182/hepdata.69869.v1/t4

    The Drell-Yan pre-FSR dilepton rapidity distribution D(SIG)/DABS(YRAP) within the detector acceptance, for the mass bin 30-45 GeV, as measured in...

  • Table 5

    Data from Fig.4

    10.17182/hepdata.69869.v1/t5

    The Drell-Yan pre-FSR dilepton rapidity distribution D(SIG)/DABS(YRAP) within the detector acceptance, for the mass bin 45-60 GeV, as measured in...

  • Table 6

    Data from Fig.4

    10.17182/hepdata.69869.v1/t6

    The Drell-Yan pre-FSR dilepton rapidity distribution D(SIG)/DABS(YRAP) within the detector acceptance, for the mass bin 60-120 GeV, as measured in...

  • Table 7

    Data from Fig.4

    10.17182/hepdata.69869.v1/t7

    The Drell-Yan pre-FSR dilepton rapidity distribution D(SIG)/DABS(YRAP) within the detector acceptance, for the mass bin 120-200 GeV, as measured in...

  • Table 8

    Data from Fig.4

    10.17182/hepdata.69869.v1/t8

    The Drell-Yan pre-FSR dilepton rapidity distribution D(SIG)/DABS(YRAP) within the detector acceptance, for the mass bin 200-1500 GeV, as measured in...

  • Table 9

    Data from Fig.5

    10.17182/hepdata.69869.v1/t9

    Measured ratio of the Drell-Yan normalized differential cross sections at center-of-mass energies of 7 and 8 TeV in the combined...

  • Table 10

    Data from Fig.6

    10.17182/hepdata.69869.v1/t10

    Measured ratio of the Drell-Yan normalized differential cross sections as a function of the absolute dilepton rapidity within the detector...

  • Table 11

    Data from Fig.6

    10.17182/hepdata.69869.v1/t11

    Measured ratio of the Drell-Yan normalized differential cross sections as a function of the absolute dilepton rapidity within the detector...

  • Table 12

    Data from Fig.6

    10.17182/hepdata.69869.v1/t12

    Measured ratio of the Drell-Yan normalized differential cross sections as a function of the absolute dilepton rapidity within the detector...

  • Table 13

    Data from Fig.6

    10.17182/hepdata.69869.v1/t13

    Measured ratio of the Drell-Yan normalized differential cross sections as a function of the absolute dilepton rapidity within the detector...

  • Table 14

    Data from Fig.6

    10.17182/hepdata.69869.v1/t14

    Measured ratio of the Drell-Yan normalized differential cross sections as a function of the absolute dilepton rapidity within the detector...

  • Table 15

    Data from Fig.6

    10.17182/hepdata.69869.v1/t15

    Measured ratio of the Drell-Yan normalized differential cross sections as a function of the absolute dilepton rapidity within the detector...

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