| 1. |
- Mahmoudi, Farvah
(författare)
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New constraints on supersymmetric models from b --> s gamma
- 2007
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Ingår i: Journal of High Energy Physics (JHEP). - : Springer Science and Business Media LLC. - 1126-6708 .- 1029-8479. ; 12, s. 026-
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Tidskriftsartikel (populärvet., debatt m.m.)abstract
- We provide an analysis of the parameter space of several supersymmetry breaking scenarios such as the minimal supergravity (mSUGRA) model and the non universal Higgs mass (NUHM) framework, as well as the Anomaly Mediated Supersymmetry Breaking (AMSB) and the Gauge Mediated Supersymmetry Breaking (GMSB) models, in the light of a novel observable in b → sγ transitions, i.e. the isospin symmetry breaking in the exclusive B → K*γ decays. We find that in many cases, this observable provides severe restrictions on the allowed parameter space regions for the mentioned models. Moreover, we provide a few examples of investigations of the physical masses of supersymmetric particles and search for the excluded values. The constraints from the branching ratio associated to b → sγ are also presented here for all the examined parameter space regions. A comparison with Bs → μ+μ− branching ratio has also been performed.
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| 2. |
- Mahmoudi, Farvah
(författare)
-
SuperIso : A Program for calculating the isospin asymmetry of B ---> K* gamma in the MSSM
- 2008
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Ingår i: Computer Physics Communications. - : Elsevier BV. - 0010-4655 .- 1879-2944. ; 178:10, s. 745-754
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Tidskriftsartikel (populärvet., debatt m.m.)abstract
- We present a program for calculating the isospin symmetry breaking in B -> , K*gamma decays in the MSSM with minimal flavor violation. This program calculates the NLO supersymmetric contributions to the isospin asymmetry, using the effective Hamiltonian approach and within the QCD factorization method. We show that isospin symmetry breaking proves to be a very restrictive observable, in particular in the mSUGRA parameter space. The program also calculates the inclusive branching ratio associated to b -> , s gamma transition, as a comparison reference.
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