Measurement of the Shape of the Boson-Transverse Momentum Distribution in pp{yields}Z/{gamma}*{yields}e{sup +}e{sup -}+X Events Produced at {radical}(s)=1.96 TeV

Journal Article · Fri Mar 14 04:00:00 EDT 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.100.102002· OSTI ID:21123730

Abazov, V M; Alexeev, G D; Kalinin, A M; Kharzheev, Y M; Malyshev, V L; Tokmenin, V V; Vertogradov, L S; Yatsunenko, Y A ^[1]; Abbott, B; Gutierrez, P; Hossain, S; Jain, S; Kopal, M; Rominsky, M; Severini, H; Skubic, P; Strauss, M ^[2]; Abolins, M; Benitez, J A; Brock, R ^[3]

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1. Joint Institute for Nuclear Research, Dubna (Russian Federation)
2. University of Oklahoma, Norman, Oklahoma 73019 (United States)
3. Michigan State University, East Lansing, Michigan 48824 (United States)

We present a measurement of the shape of the Z/{gamma}* boson transverse momentum (q{sub T}) distribution in pp{yields}Z/{gamma}*{yields}e{sup +}e{sup -}+X events at a center-of-mass energy of 1.96 TeV using 0.98 fb{sup -1} of data collected with the D0 detector at the Fermilab Tevatron collider. The data are found to be consistent with the resummation prediction at low q{sub T}, but above the perturbative QCD calculation in the region of q{sub T}>30 GeV/c. Using events with q{sub T}<30 GeV/c, we extract the value of g{sub 2}, one of the nonperturbative parameters for the resummation calculation. Data at large boson rapidity y are compared with the prediction of resummation and with alternative models that employ a resummed form factor with modifications in the small Bjorken x region of the proton wave function.

• OSTI ID: 21123730
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 10 Vol. 100; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BOSONS
ELECTRONS
FERMILAB TEVATRON
FORM FACTORS
GEV RANGE 10-100
PAIR PRODUCTION
PARTICLE RAPIDITY
PERTURBATION THEORY
POSITRONS
PROTONS
QUANTUM CHROMODYNAMICS
TEV RANGE 01-10
TRANSVERSE MOMENTUM
WAVE FUNCTIONS