Comelli, D. (2010) Exploding Sudakov form factors. Il nuovo cimento C, 33 (2). pp. 33-39. ISSN 1826-9885
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Abstract
Contrary to what naively expected, we find that in spontaneously broken gauge theories the resummations of Sudakov double logs (in the presence of an energy scale Q much larger than the mass scale v of the spontaneous gauge breaking) are exponentiated also with a positive coefficient e+α log2 Q2v2. The amplitudes affected by such a term are proportional to v and have a non-zero total gauge charge. As a working example we consider a model with two Abelian gauge groups U'(1)⊗U(1) with large mass splitting MZ' >>� �MZ, and we compute leading radiative corrections to the decay of the heavy extra Z' boson into light fermions.
| Item Type: | Article |
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| Uncontrolled Keywords: | General properties of perturbation theory ; Spontaneous breaking of gauge symmetries |
| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 31 Mar 2020 15:49 |
| Last Modified: | 31 Mar 2020 15:49 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/16826 |
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