Benvenuti nell'Anagrafe della Ricerca d'Ateneo
La valutazione delle attività di ricerca che si svolgono nelle università ha assunto un'importanza rilevante sia per l'intero sistema universitario sia all'interno di ogni singolo ateneo. Roma Tre si è quindi dotata di idonei strumenti informativi in grado di supportare al meglio le azioni di monitoraggio e di valutazione delle attività di ricerca svolte nei propri dipartimentied ha realizzato una Anagrafe della Ricerca di Ateneo.
EnglishWe present the QCD corrections to R(b) and to the Delta B = 1 effective Hamiltonian in models with a second Higgs field that couples to the quarks respecting the criterion of minimal flavor violation, thus belonging either to the (1, 2)(1/2) or to the (8, 2)(1/2) representation of SU(3) x SU(2) x U(1). After the inclusion of the QCD corrections, the prediction for R(b) becomes practically insensitive to the choice of renormalization scheme for the top mass, which for the type-I and type-II models translates in a more robust lower bound on tan beta. The QCD-corrected determinations of R(b) and BR(B -> X(s)gamma) are used to discuss the constraints on the couplings of a (colored) charged Higgs boson to top and bottom quarks.
Degrassi G, & Slavich P (2010). QCD corrections in two-Higgs-doublet extensions of the standard model with minimal flavor violation. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 81(7) [10.1103/PhysRevD.81.075001].
| Titolo: | QCD corrections in two-Higgs-doublet extensions of the standard model with minimal flavor violation | |
| Autori: | ||
| Data di pubblicazione: | 2010 | |
| Rivista: | ||
| Citazione: | Degrassi G, & Slavich P (2010). QCD corrections in two-Higgs-doublet extensions of the standard model with minimal flavor violation. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 81(7) [10.1103/PhysRevD.81.075001]. | |
| Abstract: | We present the QCD corrections to R(b) and to the Delta B = 1 effective Hamiltonian in models with a second Higgs field that couples to the quarks respecting the criterion of minimal flavor violation, thus belonging either to the (1, 2)(1/2) or to the (8, 2)(1/2) representation of SU(3) x SU(2) x U(1). After the inclusion of the QCD corrections, the prediction for R(b) becomes practically insensitive to the choice of renormalization scheme for the top mass, which for the type-I and type-II models translates in a more robust lower bound on tan beta. The QCD-corrected determinations of R(b) and BR(B -> X(s)gamma) are used to discuss the constraints on the couplings of a (colored) charged Higgs boson to top and bottom quarks. | |
| Handle: | http://hdl.handle.net/11590/134180 | |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
File in questo prodotto:
http://hdl.handle.net/11590/134180
Copyright © 2022