Conveners
Composite higgs
- Adam Falkowski (Universite de Paris-Sud 11 (FR))
Composite higgs
- Adam Falkowski (Universite de Paris-Sud 11 (FR))
Dr
Tirtha Sankar Ray
(University of Melbourne)
27/05/2014, 14:30
SuSy and other BSM phenomenology
Parallel Session talk
I will discuss four-dimensional UV descriptions of composite Higgs models without elementary scalars, in which four-fermion interactions are introduced to an underlying gauge theory like the gauged NJL model. When the anomalous dimension of the fermion bilinear is large, these interactions drive the spontaneous global symmetry breaking in the model, with the Higgs identified as a...
Mr
Aleksandr Azatov
(CERN)
27/05/2014, 14:50
SuSy and other BSM phenomenology
Parallel Session talk
I will discuss the top flavour violation in composite Higgs models. The talk will be focused on the $t\rightarrow z c$ decay. We will show that even in the models with custodial protection for the $Z\bar b b$ coupling the arguments of the naturalness of the electroweak symmetry breaking scale lead to the observable branching ratio for this decay mode. At last I will discuss the current...
Oleksii Matsedonskyi
(I)
27/05/2014, 15:10
SuSy and other BSM phenomenology
Parallel Session talk
We discuss the flavour physics constraints on the Composite Higgs models formulated in the purely four-dimensional framework, together with the constraints coming from the electroweak precision tests. Our approach aims at the full exploration of the implications of the Goldstone nature of the Higgs boson, using concrete calculable models and a more general effective field theory description....
Matthias König
27/05/2014, 15:30
SuSy and other BSM phenomenology
Parallel Session talk
Flavour- and CP-violating electromagnetic or chromomagnetic dipole operators in the quark sector are generated in a large class of new physics models and are strongly constrained by measurements of the neutron electric dipole moment and observables sensitive to flavour-changing neutral currents, such as the $B\to X_s\gamma$ branching ratio and $\epsilon'/\epsilon$. We analyze these effects in...
Thomas Flacke
(KAIST)
27/05/2014, 15:50
SuSy and other BSM phenomenology
Parallel Session talk
We study the implications of a large degree of compositeness for the light generation quarks in composite pseudo-Nambu-Goldstone-boson Higgs models. We focus in particular on viable scenarios where the right-handed up-type quarks have a sizable mixing with the strong dynamics. For concreteness we assume the latter to be characterized by an SO(5)/SO(4) symmetry with fermionic resonances in the...
Ilaria Brivio
(Universidad Autónoma de Madrid)
27/05/2014, 16:40
Higgs Physics
Parallel Session talk
One of the most compelling questions following the Higgs discovery is whether this new particle is an elementary or a composite one. We present a promising way to shed light on this issue, adopting a model-independent, effective approach.
Comparing, at first order in the expansions, a non-linear effective Lagrangian for a light dynamical Higgs with a linear effective Lagrangian, we identify...
Paul Archer
(M)
27/05/2014, 17:00
SuSy and other BSM phenomenology
Parallel Session talk
In the minimal composite Higgs model (MCHM), the size of the Higgs mass and vacuum expectation value is determined, via the Higgs potential, by the size of operators that violate the global SO(5) symmetry. In 5D holographic realisations of this model, this translates into the inclusion of brane localised operators. However, the inclusion of all such operators results in a large and...
Dr
Nicholas Setzer
(Universidad de Granada)
27/05/2014, 17:20
SuSy and other BSM phenomenology
Parallel Session talk
Recently it has been shown that in composite Higgs models where, in the 5D framework, the metric significantly deviates from AdS in the IR, it is possible to obtain viable electroweak oblique parameters without imposing custodial symmetry. We construct a gauge-Higgs model that mimics the essential features of these modified AdS models—enabling full calculational control—and examine the...
Alberto Parolini
(S)
27/05/2014, 17:40
SuSy and other BSM phenomenology
Parallel Session talk
We study the consequences of combining SUSY with a pseudo Nambu-Goldstone boson Higgs coming from an $\mbox{SO}(5)/\mbox{SO}(4)$ coset and “partial compositeness”. In particular, we focus on how electroweak symmetry breaking and the Higgs mass are reproduced in models where the symmetry $\mbox{SO}(5)$ is linearly realized. While the stops are generally heavy, light fermion top partners below...
