First Measurement of the Angular Coefficients of Drell-Yan e{sup +}e{sup -} Pairs in the Z Mass Region from pp Collisions at {radical}(s)=1.96 TeV

Journal Article · Fri Jun 17 00:00:00 EDT 2011 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.106.241801· OSTI ID:21567461

Aaltonen, T; Brucken, E; Devoto, F; Mehtala, P; Orava, R ^[1]; Alvarez Gonzalez, B; Casal, B; Cuevas, J; Gomez, G; Palencia, E; Rodrigo, T; Ruiz, A; Scodellaro, L; Vila, I; Vilar, R; Vizan, J ^[2]; Amerio, S; Dorigo, T; Totaro, P ^[3]; Amidei, D ^[4]

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1. Division of High Energy Physics, Department of Physics, University of Helsinki and Helsinki Institute of Physics, FIN-00014, Helsinki (Finland)
2. Instituto de Fisica de Cantabria, CSIC-University of Cantabria, 39005 Santander (Spain)
3. Istituto Nazionale di Fisica Nucleare, Sezione di Padova-Trento, I-35131 Padova (Italy)
4. University of Michigan, Ann Arbor, Michigan 48109 (United States)

We report on the first measurement of the angular distributions of final state electrons in pp{yields}{gamma}{sup *}/Z{yields}e{sup +}e{sup -}+X events produced in the Z boson mass region at {radical}(s)=1.96 TeV. The data sample collected by the CDF II detector for this result corresponds to 2.1 fb{sup -1} of integrated luminosity. The angular distributions are studied as a function of the transverse momentum of the electron-positron pair and show good agreement with the Lam-Tung relation, consistent with a spin-1 description of the gluon, and demonstrate that, at high values of the transverse momentum, Z bosons are produced via quark-antiquark annihilation and quark-gluon Compton processes.

• OSTI ID: 21567461
• Journal Information: Physical Review Letters, Vol. 106, Issue 24; Other Information: DOI: 10.1103/PhysRevLett.106.241801; (c) 2011 American Institute of Physics; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANGULAR DISTRIBUTION
ANNIHILATION
DRELL MODEL
ELECTRONS
FERMILAB COLLIDER DETECTOR
GLUONS
LUMINOSITY
MASS
POSITRONS
PROTON-PROTON INTERACTIONS
QUARK-ANTIQUARK INTERACTIONS
QUARKS
SPIN
TEV RANGE 01-10
TRANSVERSE MOMENTUM
Z NEUTRAL BOSONS
ANGULAR MOMENTUM
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BARYON-BARYON INTERACTIONS
BOSONS
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
HADRON-HADRON INTERACTIONS
INTERACTIONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
LEPTONS
LINEAR MOMENTUM
MATTER
MEASURING INSTRUMENTS
NUCLEON-NUCLEON INTERACTIONS
OPTICAL PROPERTIES
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
PROTON-NUCLEON INTERACTIONS
RADIATION DETECTORS
TEV RANGE