First Measurement of the Angular Coefficients of Drell-Yan e+e- Pairs in the Z Mass Region from pp̅ Collisions at √s=1.96 TeV
We report on the first measurement of the angular distributions of final state electrons in pp̅ →γ*/Z→e+e-+X [p p overstrike → gamma* / Z→e superscript + e superscript - + X] events produced in the Z boson mass region at √s=1.96 [square root of s=1.96] TeV. The data sample collected by the CDF II...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society
2011
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| Online Access: | http://hdl.handle.net/1721.1/65191 https://orcid.org/0000-0002-6047-4211 |
| Summary: | We report on the first measurement of the angular distributions of final state electrons in pp̅ →γ*/Z→e+e-+X [p p overstrike → gamma* / Z→e superscript + e superscript - + X] events produced in the Z boson mass region at √s=1.96 [square root of s=1.96] TeV. The data sample collected by the CDF II detector for this result corresponds to 2.1 fb-1 [fb superscript -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. |
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