We report on the first measurement of the angular distributions of final state electrons in pp̅ →γ*/Z→e+e-+X events produced in the Z boson mass region at √s=1.96  TeV. The data sample collected by the CDF II detector for this result corresponds to 2.1  fb-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.

T. AALTONEN, B. ÁLVAREZ GONZÁLEZ, S. AMERIO, D. AMIDEI, A. ANASTASSOV, A. ANNOVI, et al. (2011). First Measurement of the Angular Coefficients of Drell-Yan e+e- Pairs in the Z Mass Region from p anti-p Collisions at √s=1.96 TeV. PHYSICAL REVIEW LETTERS, 106, 241801-1-241801-8 [10.1103/PhysRevLett.106.241801].

First Measurement of the Angular Coefficients of Drell-Yan e+e- Pairs in the Z Mass Region from p anti-p Collisions at √s=1.96 TeV

BRIGLIADORI, LUCA;CASTRO, ANDREA;DENINNO, MARIA MADDALENA;MAZZANTI, PAOLO;MOGGI, NICCOLO';MUSSINI, MANUEL;RIMONDI, FRANCO;ZUCCHELLI, STEFANO
2011

Abstract

We report on the first measurement of the angular distributions of final state electrons in pp̅ →γ*/Z→e+e-+X events produced in the Z boson mass region at √s=1.96  TeV. The data sample collected by the CDF II detector for this result corresponds to 2.1  fb-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.
2011
T. AALTONEN, B. ÁLVAREZ GONZÁLEZ, S. AMERIO, D. AMIDEI, A. ANASTASSOV, A. ANNOVI, et al. (2011). First Measurement of the Angular Coefficients of Drell-Yan e+e- Pairs in the Z Mass Region from p anti-p Collisions at √s=1.96 TeV. PHYSICAL REVIEW LETTERS, 106, 241801-1-241801-8 [10.1103/PhysRevLett.106.241801].
T. AALTONEN; B. ÁLVAREZ GONZÁLEZ; S. AMERIO; D. AMIDEI; A. ANASTASSOV; A. ANNOVI; J. ANTOS; G. APOLLINARI; J. APPEL; T. ARISAWA; A. ARTIKOV; J. ASAADI...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/119245
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