CMS-PAS-SMP-16-009 | ||
Measurement of the differential Drell-Yan cross section in proton-proton collisions at $\sqrt{s} = $ 13 TeV | ||
CMS Collaboration | ||
August 2016 | ||
Abstract: We present measurement of the differential Drell-Yan cross section $\mathrm{d}\sigma/\mathrm{d}m$. The analysis is based on the full 2015 dataset, corresponding to an integrated luminosity of 2.8 fb$^{-1}$ of proton-proton collision data collected by the CMS detector. The cross section measurement is reported in the dimuon invariant mass range from 15 to 3000 GeV. The results are corrected to the full phase space and the effects of final state radiation are also taken into account. The data are compared to perturbative QCD predictions. The results are found to be in good agreement with the standard model predictions. | ||
Links: CDS record (PDF) ; inSPIRE record ; CADI line (restricted) ; |
Figures | Summary | Additional Figures | References | CMS Publications |
---|
Figures | |
png pdf |
Figure 1:
The observed dimuon invariant mass spectra within the detector acceptance. The EW contributions indicate the $\mathrm {DY} \rightarrow \tau ^+\tau ^-$, diboson, and W+jets productions. Error bars are statistical only. |
png pdf |
Figure 2:
The DY acceptance (A), efficiency ($\varepsilon $) and their product per invariant mass bin. |
png pdf |
Figure 3:
Summary of the systematic uncertainties for $\mathrm{d}\sigma / \mathrm{d} m $ measurement. The ``Total Systematic'' is a quadratic sum of all systematic uncertainty sources except for the Acc.+PDF. |
png pdf |
Figure 4:
Result of the DY differential cross section measurement for full phase space with FSR correction as a function of dimuon invariant mass compared to the NNLO theoretical prediction of FEWZ (red) and the NLO prediction of MadGraph5-aMCatNLO (green). Both NNPDF3.0 PDF set is used for the theoretical calculation. In the middle and bottom plots, the band with red colour denotes total uncertainty which is the combination of statistical, systematical, theoretical, and luminosity uncertainties. The band with purple colour denotes the statistical uncertainty only. |
png pdf |
Figure 5:
Comparison between the experimental results for fiducial cross section without FSR correction and the NLO theoretical prediction using MadGraph5-aMCatNLO. On the bottom plot, the band with red colour denotes total uncertainty which is the combination of statistical, systematical, and luminosity uncertainty. The band with purple colour denotes the statistical uncertainty only. |
Summary |
In summary, this note presented results of the measurement of the Drell-Yan differential cross section $\mathrm{d}\sigma/\mathrm{d}m$ in the dimuon channel in the mass range 15 $ < m < $ 3000 GeV in proton-proton collisions at $\sqrt{s} = $ 13 TeV. The measurement is based on the dataset corresponding to an integrated luminosity of 2.8 fb$^{-1}$. The measurement is corrected for detector resolution correction resulting in event migration between mass bins, efficiency caused by the difference between data and MC simulation, acceptance to take into account the coverage of CMS detector, and FSR effects pronounced mostly below the Z peak. The results are in good agreement with the SM theoretical predictions at NNLO predictions calculated with FEWZ and NLO predictions calculated with aMCatNLO. |
Additional Figures | |
png pdf |
Additional Figure 1:
The response matrix from simulation for detector resolution effect. |
png pdf |
Additional Figure 2:
The response matrix from simulation for FSR effect. |
png pdf |
Additional Figure 3:
Fraction of backgrounds as a function of dimuon invariant mass. The fraction is determined by the ratio of the number of backgrounds estimated to the number of data after event selection respectively. |
References | ||||
1 | R. Hamberg, W. L. van Neerven, and T. Matsuura | A complete calculation of the order $ \alpha^2_s $ correction to the Drell--Yan K-factor | Nucl. Phys. B 359 (1991) 343, . Erratum-ibid. B644 (2002) 403-404 | |
2 | S. Catani et al. | Vector Boson Production at Hadron Colliders: A Fully Exclusive QCD Calculation at Next-to-Next-to-Leading Order | PRL 103 (2009) 082001 | 0903.2120 |
3 | S. Catani and M. Grazzini | Next-to-Next-to-Leading-Order Subtraction Formalism in Hadron Collisions and its Application to Higgs-Boson Production at the Large Hadron Collider | PRL 98 (2007) 222002 | hep-ph/0703012 |
4 | K. Melnikov and F. Petriello | Electroweak gauge boson production at hadron colliders through O($ \alpha_s^2 $) | PRD 74 (2006) 114017 | hep-ph/0609070 |
5 | F. Goertz, A. Katz, M. Son, and A. Urbano | Precision Drell-Yan Measurements at the LHC and Implications for the for the Diphoton Excess | 1602.04801 | |
6 | ATLAS Collaboration | Measurement of the high-mass Drell--Yan differential cross-section in $ pp $ collisions at $ \sqrt{s} = 7 $ TeV with the ATLAS detector | PLB 725 (2013) 223 | 1305.4192 |
7 | ATLAS Collaboration | Measurement of the low-mass Drell--Yan differential cross section at $ \sqrt{s}=7 $$ TeV $ using the ATLAS detector | JHEP 06 (2014) 112 | 1404.1212 |
8 | CMS Collaboration | Measurement of the Drell--Yan Cross Section in pp Collisions at $ \sqrt s=7 $ TeV | JHEP 10 (2011) 007 | CMS-EWK-10-007 1108.0566 |
9 | CMS Collaboration | Measurement of the differential and double-differential Drell--Yan cross sections in proton-proton collisions at $ \sqrt{s} = 7 $$ TeV $ | JHEP 12 (2013) 030 | |
10 | CMS Collaboration | Measurement of differential and double-differential Drell--Yan cross sections in proton-proton collisions at $ \sqrt{s} = 8 $$ TeV $ | EPJC 75 (2015) 147 | |
11 | CMS Collaboration | Performance of electron reconstruction and selection with the CMS detector in proton-proton collisions at $ \sqrt{s} = 8 $$ TeV $ | JINST 10 (2015) P06005 | CMS-EGM-13-001 1502.02701 |
12 | CMS Collaboration | Performance of CMS muon reconstruction in pp collision events at $ \sqrt{s} = 7 $$ TeV $ | JINST 7 (2012) P10002 | CMS-MUO-10-004 1206.4071 |
13 | CMS Collaboration | The CMS experiment at the CERN LHC | JINST 3 (2008) S08004 | CMS-00-001 |
14 | J. Alwall et al. | The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations | JHEP 07 (2014) 079 | 1405.0301 |
15 | R. D. Ball et al. | A first unbiased global NLO determination of parton distributions and their uncertainties | Nucl. Phys. B 838 (2010) 136 | |
16 | NNPDF Collaboration | Parton distributions for the LHC Run II | JHEP 04 (2015) 040 | 1410.8849 |
17 | R. Frederix and S. Frixione | Merging meets matching in MC@NLO | JHEP 1212 (2012) 061 | 1209.6215 |
18 | P. Nason | A New Method for Combining NLO QCD with Shower Monte Carlo Algorithms | JHEP 11 (2004) 040 | |
19 | S. Frixione, P. Nason, C. Oleari | Matching NLO QCD computations with parton shower simulations: the POWHEG method | JHEP 11 (2007) 070 | |
20 | S. Alioli, P. Nason, C. Oleari, and E. Re | A General Framework for Implementing NLO Calculations in Shower Monte Carlo Programs: the POWHEG BOX | JHEP 06 (2010) 043 | |
21 | S. Alioli, P. Nason, C. Oleari, and E. Re | NLO Vector Boson Production Matched with Shower in POWHEG | JHEP 07 (2008) 060 | |
22 | T. Sjöstrand et al. | An Introduction to PYTHIA 8.2 | CPC 191 (2015) 159--177 | 1410.3012 |
23 | CMS Collaboration | Event generator tunes obtained from underlying event and multiparton scattering measurements | EPJC 76 (2016), no. 3, 155 | CMS-GEN-14-001 1512.00815 |
24 | GEANT4 Collaboration | GEANT4 -- a simulation toolkit | NIMA 506 (2003) 250 | |
25 | CMS Collaboration | Muon Reconstruction and Identification Improvements for Run-2 and First Results with 2015 Run Data | Technical Report CMS-DP-15-015, CERN, Geneva | |
26 | A. Bodek et al. | Extracting muon momentum scale corrections for hadron collider experiments | EPJC 72 (2012) 2194 | 1208.3710 |
27 | CMS Collaboration | Search for physics beyond the standard model in dilepton mass spectra in proton-proton collisions at $ \sqrt{s} = 8 $$ TeV $ | JHEP 04 (2015) 025 | CMS-EXO-12-061 1412.6302 |
28 | R. Gavin, Y. Li, F. Petriello, and S. Quackenbush | FEWZ 2.0: A code for hadronic Z production at next-to-next-to-leading order | CPC 182 (2011) 2388 | 1011.3540 |
29 | Y. Li and F. Petriello | Combining QCD and electroweak corrections to dilepton production in FEWZ | PRD 86 (2012) 094034 | |
30 | D. Bourilkov | Photon-induced Background for Dilepton Searches and Measurements in pp Collisions at 13 TeV | 1606.00523 | |
31 | G. D'Agostini | A multidimensional unfolding method based on Bayes' theorem | NIMA 362 (1995) 487 | |
32 | CMS Collaboration | Measurement of the inclusive W and Z production cross sections in pp collisions at $ \sqrt{s} = $ 7 TeV with the CMS experiment | JHEP 10 (2011) 132 | CMS-EWK-10-005 1107.4789 |
33 | M. R. Whalley, D. Bourilkov, and R. C. Group | The Les Houches accord PDFs (LHAPDF) and LHAGLUE | in HERA and the LHC: A Workshop on the implications of HERA for LHC physics. Proceedings, Part B 2005 | hep-ph/0508110 |
34 | D. Bourilkov, R. C. Group, and M. R. Whalley | LHAPDF: PDF use from the Tevatron to the LHC | in TeV4LHC Workshop - 4th meeting Batavia, Illinois, October 20-22, 2005 2006 | hep-ph/0605240 |
35 | A. Buckley et al. | LHAPDF6: parton density access in the LHC precision era | EPJC75 (2015) 132 | 1412.7420 |
36 | E. Barberio, B. van Eijk, and Z. Was | PHOTOS - a universal Monte Carlo for QED radiative corrections in decays | CPC 66 (1991) 115 | |
37 | E. Barberio and Z. Was | PHOTOS - a universal Monte Carlo for QED radiative corrections: version 2.0 | CPC 79 (1994) 291 | |
38 | CMS Collaboration | CMS Luminosity Measurement for the 2015 Data Taking Period |
Compact Muon Solenoid LHC, CERN |