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Flavor physics in an SO(10) grand unified model

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posted on 2023-06-15, 13:58 authored by Jennifer Girrbach, Sebastian JaegerSebastian Jaeger, Markus Knopf, Waldemar Martens, Ulrich Nierste, Christian Scherrer, Sören Wiesenfeldt
In supersymmetric grand-unified models, the lepton mixing matrix can possibly affect flavor-changing transitions in the quark sector. We present a detailed analysis of a model proposed by Chang, Masiero and Murayama, in which the near-maximal atmospheric neutrino mixing angle governs large new b???s transitions. Relating the supersymmetric low-energy parameters to seven new parameters of this SO(10) GUT model, we perform a correlated study of several flavor-changing neutral current (FCNC) processes. We find the current bound on more constraining than BXs. The LEP limit on the lightest Higgs boson mass implies an important lower bound on tan ß, which in turn limits the size of the new FCNC transitions. Remarkably, the combined analysis does not rule out large effects in mixing and we can easily accomodate the large CP phase in the Bs-Bs system which has recently been inferred from a global analysis of CDF and DØ data. The model predicts a particle spectrum which is different from the popular Constrained Minimal Supersymmetric Standard Model (CMSSM). Bs-Bs enforces heavy masses, typically above 1TeV, for thes fermions of the degenerate first two generations. However, the ratio of the third-generation and first-generation sfermion masses is smaller than in the CMSSM and a (dominantly right-handed) stop with mass below 500GeV is possible.

History

Publication status

  • Published

File Version

  • Published version

Journal

Journal of High Energy Physics

ISSN

1029-8479

Publisher

Springer Verlag

Issue

6

Volume

2011

Page range

44

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2012-02-06

First Open Access (FOA) Date

2016-03-22

First Compliant Deposit (FCD) Date

2016-11-17

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