First Measurement of the Angular Coefficients of Drell-Yan $$e^{+}e^{-}$$ pairs in the Z Mass Region from $$p\bar{p}$$ Collisions at $$\sqrt{s}$$ = 1.96 TeV

Journal Article · Tue Mar 01 00:00:00 EST 2011 · Submitted to Phys.Rev.Lett.

DOI:https://doi.org/10.1103/PhysRevLett.106.241801· OSTI ID:1013147

Aaltonen, T; Aaltonen, T; Alvarez Gonzalez, B; Amerio, S; Amidei, D; Anastassov, A; Annovi, A; Antos, J; Apollinari, G; Appel, J A; Apresyan, A

We report on the first measurement of the angular distributions of final state electrons in p{bar p} {yields} {gamma}*/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 anti-quark annihilation and quark-gluon Compton processes.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1013147
• Report Number(s): FERMILAB-PUB-11-153-E; arXiv eprint number arXiv:1103.5699; TRN: US1102419
• Journal Information: Submitted to Phys.Rev.Lett., Vol. 106, Issue 24; ISSN 0031--9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR DISTRIBUTION
ANNIHILATION
BOSONS
ELECTRONS
FERMILAB COLLIDER DETECTOR
LUMINOSITY
QUARKS
TRANSVERSE MOMENTUM
Experiment-HEP