Dr Bianca Letizia Cerchiai (Centro Fermi Roma e Politecnico di Torino)
In this talk I'd like to investigate some properties of Born-Infeld theories. I start from a linear form of the Lagrangian in terms of auxiliary fields as introduced in [arXiv:1412:6786]. Depending of the scalar fields coset manifold, integrating out the auxiliary fields yields various Born-Infeld type Lagrangians with different symmetry group.
Yasuhiro Yamaguchi (GE)
In the hadron spectroscopy in the heavy quark region, new symmetry plays an important role. The symmetry is the heavy quark spin symmetry. It manifests the mass degeneracy of the states with different total spin, e.g. the mass degeneracy of the heavy pseudoscalar and vector mesons. It is important to generate the exotic hadron structures found in the heavy quark region. The mass...
Giancarlo Rossi (ROMA2)
In this talk we present an example of an extension of the Standard Model where unification of strong and electroweak interactions occurs at a level comparable to that of the minimal supersymmetric standard model.
Dr Fotis Farakos (University of Padova)
When supersymmetry is broken and nonlinearly realized, one may remove from the spectrum of the theory various component fields. This is achieved by introducing appropriate constraints to the various superfields. We discuss the coupling of the nilpotent Goldstino superfield to supersymmetry and supergravity, and to matter superfields. We also give a generic setup within which one can remove...
Dr Elena Santopinto (INFN)
We study the possibility that at least one of the two pentaquark structures recently reported by LHCb, can be described as a compact pentaquark state, and we give predictions for new channels that can be studied by the experimentalist if this hypothesis was correct. We use very general arguments dictated by symmetry considerations, in order to describe pentaquark states within a symmetry...
Lucrezia Ravera (TO)
In this talk I will present a detailed investigation of the gauge algebra hidden in all free differential algebras in supersymmetric theories, focusing in particular on the minimal D=7 supergravity case, where the hidden structure is particularly rich. I will also discuss its relation with the 11-dimensional theory.
Flavio Porri (Utrecht University)
We find and study BPS bound states of spinning black holes in 5d asymptotically flat spacetime. These solutions follow from multi-string solutions in six-dimensional minimal supergravity and can be uplifted to F- or M-theory. We analyze the regularity conditions and work out the example of a bound state of two black holes in detail. The bound state is supported by fluxes through nontrivial...
Dr Redigolo Diego (LPTHE_CNRS)
We will review Twin Higgs constructions in light of SUSY UV completions. Combining the Twin Higgs and SUSY provides a perturbative solution of the hierarchy problem in which the low-lying states stabilizing the EW scale are uncharged under the SM gauge group. We will discuss the fine tuning of the EW scale and the rich phenomenology of the Higg sector in a wide class of Twin SUSY models. We...
Dario Buttazzo (Universität Zürich)
We consider the NMSSM extended to include one vector-like family of quarks and leptons. If (some of) these matter particles, as the Higgs doublets, become strongly coupled to the singlet at a common scale Λ ~ 10-1000 TeV, this gives the correct enhancement of the tree level Higgs boson mass required to reach 125 GeV. It is conceivable that the Yukawa couplings to the singlet, although naively...
Fabrizio Del Monte
In the last few years a new class of theories has been discovered consistently describing massive spin-2 fields nonlinearly interacting with a single massless one. These multimetric gravities provide a solution to the problem of the so-called Boulware-Deser ghost, previously thought to unavoidably plague any interacting theory of massive spin-2 particles. We note that their action in the...
Alessandro Bombini (FI)
In this talk I will show that every Black Hole Horizon possesses an Asymptotic Symmetry Group (ASG) whose group structure is non trivial. I will begin with an introduction on known asymptotic symmetries, both at the Horizon and at the Null Infinity of Asymptotically Flat Spacetimes, a.k.a. the BMS group. Therefore I will describe the ASG in all the details, stating it as a Theorem. Briefly,...
The determination of oscillation and, mainly, mass parameters is still a central problem of neutrino physics, having a great impact on elementary particle physics and astrophysics. After a brief review of the important steps forward of the last 10-15 years, we focused on the central issue of the mass hierarchy determination. We discuss some related theoretical aspects, the present state of...