Adriani, O. ; Aguilar-Benitez, M. ; Ahlen, S. ; Gurtu, A. ; et., al (1993) Determination of quark electroweak couplings from direct photon production in hadronic Z decays Physics Letters B, 301 (1). pp. 136-144. ISSN 0370-2693
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Official URL: http://www.sciencedirect.com/science/article/pii/0...
Related URL: http://dx.doi.org/10.1016/0370-2693(93)90735-Z
Abstract
We report on a comparison of isolated hard photon production in hadronic Z decays with the predictions of a next-to-leading order matrix-element calculation. We constrain the quark electroweak couplings to the Z boson with a simultaneous fit to three direct photon distributions, and combine this result with an independent constraint from our measurement of the total hadronic width of the Z, obtaining cu = 0.92 ± 0.22 and cd = 1.63 ± 0.15 where cu,d = 4(g-2V + g-A)u,d. Our results are consistent with standard model predictions.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 83342 |
| Deposited On: | 20 Feb 2012 06:21 |
| Last Modified: | 20 Feb 2012 06:21 |
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