Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-11-09
Phys.Rev.Lett. 88 (2002) 102001
Physics
High Energy Physics
High Energy Physics - Phenomenology
5 pages, 3 figures
Scientific paper
10.1103/PhysRevLett.88.102001
We consider electroweak radiative corrections to hard inclusive processes at the TeV scale, and we investigate how collinear logarithms factorize in a spontaneously broken gauge theory, similarly to the DGLAP analysis in QCD. Due to the uncancelled double logs noticed previously, we find a factorization pattern which is qualitatively different from the analogous one in QCD. New types of splitting functions emerge which are needed to describe the initial beam charges and are infrared-sensitive, that is dependent on an infrared cutoff provided, ultimately, by the symmetry breaking scale. We derive such splitting functions at one-loop level in the example of SU(2) gauge theory, and we also discuss the structure functions' evolution equations, under the assumption that isospin breaking terms present in the Ward identities of the theory are sufficiently subleading at higher orders.
Ciafaloni Marcello
Ciafaloni Paolo
Comelli Denis
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