Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-03-29
Nucl.Phys. B613 (2001) 382-406
Physics
High Energy Physics
High Energy Physics - Phenomenology
15 pages, 6 figures
Scientific paper
10.1016/S0550-3213(01)00375-3
Electroweak radiative corrections with double-log enhancements occur in inclusive observables at the TeV scale because of a lack of compensation of virtual corrections with real emission due to the nonabelian (weak isospin) charges of the accelerator beams. Here we evaluate such Bloch-Nordsieck violating corrections in the case of initial longitudinal bosons, which is experimentally provided by boson fusion processes, and is related to the Goldstone-Higgs sector. All four states of this sector are involved in the group structure of the corrections, and cause in particular a novel double log effect due to hypercharge mixing in the longitudinal states. We study both the light- and the heavy-Higgs cases, and we analyze the symmetry breaking pattern of the corrections. The latter turn out to be pretty large, in the 5-10 % range, and show an interesting Higgs mass dependence, even for processes without Higgs boson in the final state.
Ciafaloni Marcello
Ciafaloni Paolo
Comelli Denis
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