$$W$$ and $$Z$$ Boson Cross Section and $$W$$ Asymmetry at CMS

Conference · Sat Oct 01 04:00:00 EDT 2011

OSTI ID:1027228

Han, Jiyeon

We report the measurement of the rates and asymmetries of inclusive and differential production of W and Z vector bosons in pp collisions at {radical}s = 7 TeV. The data consists of 36 pb{sup -1} collected in the Compact Muon Solenoid (CMS) detector at the Large Hadron Collider (LHC). The measured inclusive cross sections are {sigma}(pp {yields} WX) x B(W {yields} {ell}{nu}) = 10.31 {+-} 0.02(stat.){+-}0.09 (syst.){+-}0.10(th.){+-}0.41(lumi.) nb and {sigma}(pp {yields} ZX) x B(Z {yields} {ell}{ell}) = 0.975 {+-} 0.007(stat.){+-}0.007 (syst.){+-}0.018(th.){+-}0.039(lumi.) nb. The measured inclusive cross sections and also its ratio of W to Z or W{sup +} to W{sup -} agree with NNLO QCD cross section calculations and current parton distribution functions (PDFs). The differential production asymmetry of W boson as a function of the lepton pseudorapidity in the final state is also measured and compared with various PDFs.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL
• Sponsoring Organization: DOE Office of Science
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1027228
• Report Number(s): FERMILAB-CONF-11-516-CMS; arXiv eprint number arXiv:1110.0152
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
BOSONS
CROSS SECTIONS
DISTRIBUTION FUNCTIONS
Experiment-HEP
HADRONS
INTERMEDIATE BOSONS
LEPTONS
MUONS
PRODUCTION
QUANTUM CHROMODYNAMICS
SOLENOIDS
VECTORS