Planck 2013&nbsp;<br /> <h2>From the Planck Scale to the Electroweak Scale</h2>

Session

Parallel Session on Flavor Physics + Composite Models

22 May 2013, 14:00

Bonn

Conveners

Parallel Session on Flavor Physics + Composite Models

• Ulrich Nierste

Parallel Session on Flavor Physics + Composite Models

• Ulrich Nierste

98. Froggatt-Nielsen models with derived Z4 R-symmetry

Christoph Luhn

22/05/2013, 14:00

The observed hierarchies of fermion masses and mixing angles can be explained in the framework of Froggatt and Nielsen by imposing a family dependent U(1) symmetry. Based on a supersymmetric setting, we consider the possibility of a flavor U(1) R-symmetry which breaks down to a remnant Z4 R-symmetry. While containing R-parity as a subgroup, this discrete R-symmetry provides a solution to the...

99. Natural SUSY from a SU(2)xU(1) Flavor Model

Robert Ziegler

22/05/2013, 14:30

I am going to present a SUSY flavor model based on a global SU(2) and a gauged U(1) horizontal symmetry. In the fermion sector it closely resembles the successful predictions of the U(2) models for various relations between fermion masses and mixing angles. In the sfermion sector the U(1) acquires a large D-term vev which together with the usual F-term contribution leads to split spectrum in...

100. Spontaneous CP violation in A4xSU(5) with Constrained Sequential Dominance 2

Martin Spinrath

22/05/2013, 15:00

We revisit a two right-handed neutrino model with two texture zeros, namely an indirect model based on A4 with the recently proposed new type of constrained sequential dominance (CSD2), involving vacuum alignments along the (0,1,-1)^T and (1,0,2)^T directions in flavour space, which are proportional to the neutrino Dirac mass matrix columns. In this paper we construct a renormalizable and...

101. Neutrino Mass from a d=7 Effective Operator in a SUSY-GUT Framework

Martin Krauss

22/05/2013, 16:00

If the d=5 Weinberg operator is forbidden by a discrete symmetry, neutrino mass can be generated by new physics at the TeV scale, which can be tested at the LHC. We want to discuss models where neutrino mass originates from a d=7 operator in the framework of SUSY-GUTs containing an SU(5) subgroup. The embedding in GUT multiplets has phenomenological consequences, which we want to discuss on...

102. CP and Discrete Flavour Symmetries

Martin Holthausen

22/05/2013, 16:20

We discuss issues surrounding the definition of CP transformations in theories with discrete flavour symmetries. We will show that the consistency of the theory implies that every generalised CP transformation can be interpreted as a representation of an automorphism of the discrete group. Using this formalism, we will discuss various approaches that try to derive CP phases from geometrical...

103. Electroweak Precision Tests of Composite Higgs Models

Oleksii Matsedonskyi

22/05/2013, 16:40

We examine the compatibility of the composite Higgs models with the constraints coming from Electroweak Precision Tests from the low-energy effective theory (EFT) prospective. The EFT approach allows us to capture the common features of the composite Higgs models and incorporate a broad class of explicit models. In our analysis we concentrate on the effects related to a presence of relatively...

104. General Composite Higgs Models

David Marzocca

22/05/2013, 17:00

We construct a general class of pseudo-Goldstone composite Higgs models, within the minimal SO(5)/SO(4) coset structure. We characterize the main properties these models should have in order to give rise to a Higgs mass around 125 GeV. We assume the existence of relatively light and weakly coupled spin 1 and 1/2 resonances. In absence of a symmetry principle, we introduce the Minimal Higgs...

105. A minimally tuned composite Higgs model from an extra dimension

Andrea Thamm

22/05/2013, 17:20

I present the 5D realization of a composite Higgs model with minimal tuning. The Higgs is a (pseudo-)Goldstone boson from the spontaneous breaking of a global SO(5) symmetry to an SO(4) subgroup. The peculiarity of our construction lies in the specific choice of the SO(5) representations of the 5D fermions which reduces the tuning to the minimal model-independent value allowed by electroweak...