Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-08-15
Phys.Rev.D72:055023,2005
Physics
High Energy Physics
High Energy Physics - Phenomenology
Includes two new figures, two tables are removed, results and conclusion remain unchanged
Scientific paper
10.1103/PhysRevD.72.055023
We study the one-loop sensitivity of the WWV (V=gamma, Z) vertex to the new massive gauge bosons predicted by the minimal SU_L(3) X U_X(1) model, which have unusual couplings to the standard model (SM) gauge bosons. A gauge-fixing procedure covariant under the SU_L(2) X U_Y(1) group was introduced for these new gauge bosons (dubbed bileptons) in order to generate gauge-invariant Green functions. The similarities between this procedure and the nonconventional quantization scheme of the background field method are discussed. It is found that, for relatively light bileptons, with a mass ranging from 2m_W to 6m_W, the radiative corrections to the form factors associated with the WWV vertex can be of the same order of magnitude than the SM one. In the case of heavier bileptons, their contribution is smaller by about one and two orders of magnitude than their SM counterpart.
Montano J.
Ramirez-Zavaleta F.
Tavares-Velasco G.
Toscano J. . J.
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