Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 8, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP08(2015)039
Keywords
Electroweak interaction; Hadron-Hadron Scattering; proton-proton scattering; QCD; Forward physics
Categories
Funding
- CERN
- CAPES (Brazil)
- CNPq (Brazil)
- FAPERJ (Brazil)
- FINEP (Brazil)
- NSFC (China)
- CNRS/IN2P3 (France)
- BMBF (Germany)
- DFG (Germany)
- HGF (Germany)
- MPG (Germany)
- INFN (Italy)
- FOM (The Netherlands)
- NWO (The Netherlands)
- MNiSW (Poland)
- NCN (Poland)
- MEN/IFA (Romania)
- MinES (Russia)
- FANO (Russia)
- MinECo (Spain)
- SNSF (Switzerland)
- SER (Switzerland)
- NASU (Ukraine)
- STFC (United Kingdom)
- NSF (U.S.A.)
- IN2P3 (France)
- KIT (Germany)
- SURF (The Netherlands)
- PIC (Spain)
- GridPP (United Kingdom)
- EPLANET (European Union)
- Marie Sklodowska-Curie Actions (European Union)
- ERC (European Union)
- Conseil general de Haute-Savoie (France)
- Labex ENIGMASS (France)
- OCEVU, Region Auvergne (France)
- RFBR (Russia)
- XuntaGal and GENCAT (Spain)
- Royal Society
- Royal Commission for the Exhibition of 1851 (United Kingdom)
- STFC [ST/N000447/1, ST/J004332/1, ST/M001431/1, ST/H001093/2, ST/K003410/1, ST/K004646/1, ST/K00073X/1, ST/K00137X/1, ST/K001604/1, PP/E000347/1, ST/H00100X/2, ST/H001093/1, ST/L001144/1, ST/H00100X/1, ST/L001195/1, ST/I003576/1, ST/J004855/1, PP/E000355/1, ST/L003392/1, ST/M000729/1, ST/H006737/1, ST/M004791/1, LHCb, ST/L003163/1, LHCb Upgrades, ST/L003112/1, ST/K001361/1, ST/M004058/1, ST/I000097/1, ST/M000761/1, ST/L006146/1, ST/L00352X/1, ST/K003534/1, ST/K001302/1, PP/E003095/1, ST/J005495/1, ST/J50094X/1, ST/K00140X/1, ST/L003538/1, ST/M001407/1, ST/K000705/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/H001093/1, 1225314, ST/K001361/1, ST/K001302/1, 1415632, 1299204, ST/K001256/1, ST/M000761/1, ST/L001195/1, ST/M001407/1, LHCb Upgrades, 1511824, ST/N000447/1, ST/M000729/1, ST/L003163/1, 1096173, ST/M001474/1, ST/L003538/1, ST/M004791/1 GRIDPP, ST/N000250/1, 1416165, ST/K001310/1 ATLAS, ST/M004058/1, ST/M001431/1, ST/K00137X/1, ST/H001093/2, ST/K001418/1, ST/J005495/1, ST/K001604/1, ST/J50094X/1, ST/K00140X/1, ST/K001310/1 LHCb, ST/M004791/1, ST/I003576/1, ST/H00100X/1, PP/E000355/1, 1564711, PP/E003095/1, ST/K004646/1, LHCb, 1208164, ST/K003534/1 GRIDPP, ST/K001310/1 ATLAS Upgrades, ST/L003392/1, ST/L00352X/1, ST/L003112/1, ST/H006737/1, ST/H00100X/2, ST/L003163/1 LHCb Upgrades, ST/K000705/1, ST/L006146/1, ST/L001144/1, 1225304, ST/K003534/1, ST/K001310/1 LHCb Upgrades, 1369397, 1364044, ST/K003410/1, ST/I000097/1, ST/J004855/1, PP/E000347/1, ST/K001310/1, ST/J004332/1, GRIDPP, ST/K00073X/1] Funding Source: researchfish
- Direct For Mathematical & Physical Scien
- Division Of Physics [1505719, 1205805] Funding Source: National Science Foundation
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A measurement of the production cross-section for Z bosons that decay to muons is presented. The data were recorded by the LHCb detector during pp collisions at a centre-of-mass energy of 7 TeV, and correspond to an integrated luminosity of 1.0 fb(-1). The cross-section is measured for muons in the pseudorapidity range 2.0 < eta < 4.5 with transverse momenta p(T) >20 GeV/e. The dimuon mass is restricted to 60 < M mu+mu- < 120 GeV/c(2). The measured cross-section is sigma(Z ->mu+mu-) = (76.0 +/- 0.3 +/- 0.5 +/- 1.0 +/- 1.3) pb where the uncertainties are due to the sample size, systematic effects, the beam energy and the luminosity. This result is in good agreement with theoretical predictions at next-to-next-to-leading order in perturbative quantum chromodynamics. The cross-section is also measured differentially as a function of kinematic variables of the Z boson. Ratios of the production cross-sections of electroweak bosons are presented using updated LHCb measurements of W boson production. A precise test of the Standard Model is provided by the measurement of the ratio sigma(W+) -> mu(+) nu(mu) + sigma(W) -> mu(+) (nu) over bar (mu)/sigma(Z ->mu+mu-) = 0.09 +/- 0.12 +/- 0.05, where the uncertainty due to luminosity cancels.
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