W-GAMMA-GAMMA PRODUCTION AT THE FERMILAB TEVATRON COLLIDER - GAUGE-INVARIANCE AND RADIATION AMPLITUDE ZERO

Authors
BAUR U HAN T KAUER N SOBEY R ZEPPENFELD D
Citation
U. Baur et al., W-GAMMA-GAMMA PRODUCTION AT THE FERMILAB TEVATRON COLLIDER - GAUGE-INVARIANCE AND RADIATION AMPLITUDE ZERO, Physical review. D. Particles and fields, 56(1), 1997, pp. 140-150
Citations number
73
Categorie Soggetti
Physics, Particles & Fields
Journal title
Physical review. D. Particles and fields → ACNP
ISSN journal
05562821
Volume
56
Issue
1
Year of publication
1997
Pages
140 - 150
Database
ISI
SICI code
0556-2821(1997)56:1<140:WPATFT>2.0.ZU;2-E
Abstract
The electroweak process <p(p)over bar>/(+/-)nu gamma gamma is calculat ed at the tree level, including finite W width effects. In order to ob tain a gauge-invariant amplitude, the imaginary parts of WW gamma tria ngle graphs and WW gamma gamma box diagrams have to be included. in ad dition to resumming the imaginary contributions to the W vacuum polari zation. We demonstrate the existence of a radiation amplitude zero in <p(p)over bar> --> W(+/-)gamma gamma --> /(+/-)nu gamma gamma and disc uss how it mo) be observed in correlations of the gamma gamma and lept on rapidities at the Fermilab Tevatron.