Precise Study of the Z/{gamma} Boson Transverse Momentum Distribution in pp Collisions Using a Novel Technique

Using 7.3 fb{sup -1} of pp collisions collected by the D0 detector at the Fermilab Tevatron, we measure the distribution of the variable {phi}{sub {eta}*}, which probes the same physical effects as the Z/{gamma}* boson transverse momentum, but is less susceptible to the effects of experimental resol...

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Bibliographic Details
Published in:Physical review letters 2011-03, Vol.106 (12)
Main Authors: Abazov, V. M., Alexeev, G. D., Golovanov, G., Kharzheev, Y. N., Malyshev, V. L., Tokmenin, V. V., Vertogradov, L. S., Yatsunenko, Y. A., Abbott, B., Gutierrez, P., Hossain, S., Severini, H., Skubic, P., Strauss, M., Svoisky, P., Abolins, M., Brock, R., Edmunds, D., Fisher, W., Kraus, J.
Format: Article
Language:English
Subjects:
ACCELERATORS
BARYON-BARYON INTERACTIONS
BOSONS
CYCLIC ACCELERATORS
DISTRIBUTION
FERMILAB TEVATRON
FIELD THEORIES
HADRON-HADRON INTERACTIONS
INTERACTIONS
LINEAR MOMENTUM
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PARTICLE RAPIDITY
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
PROTON-NUCLEON INTERACTIONS
PROTON-PROTON INTERACTIONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
SYNCHROTRONS
TRANSVERSE MOMENTUM
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Summary:Using 7.3 fb{sup -1} of pp collisions collected by the D0 detector at the Fermilab Tevatron, we measure the distribution of the variable {phi}{sub {eta}*}, which probes the same physical effects as the Z/{gamma}* boson transverse momentum, but is less susceptible to the effects of experimental resolution and efficiency. A QCD prediction is found to describe the general features of the {phi}{sub {eta}*} distribution, but is unable to describe its detailed shape or dependence on boson rapidity. A prediction that includes a broadening of transverse momentum for small values of the parton momentum fraction is strongly disfavored.
ISSN:0031-9007
1079-7114
DOI:10.1103/PHYSREVLETT.106.122001