Maurizio Piai

WALKING DYNAMICS FROM STRING DUALS

Within the context of a string-theory dual to gauge theories with gauge group SU(Nc) and large Nc, we identify a class of solutions to the background equations for which a suitably defined dual of the gauge coupling exhibits the features of a walking theory. We find evidence for three distinct, dynamically generated scales, characterizing walking, symmetry breaking and confinement, and we put them in correspondence with field theory by an analysis of the operators driving the flow.

Fermion masses and mixing in extended technicolor models

We study fermion masses and mixing angles, including the generation of a seesaw mechanism for the neutrinos, in extended technicolor (ETC) theories. We formulate an approach to these problems that relies on assigning right-handed

Precision neutrino oscillation physics with an intermediate baseline reactor neutrino experiment

Q=-1/3

A Light scalar from walking solutions in gauge-string duality

quarks and charged leptons to ETC representations that are conjugates of those of the corresponding left-handed fermions. This leads to a natural suppression of these masses relative to the

Wilson loops in string duals of walking and flavored systems

Q=2/3

The decay constant of the holographic techni-dilaton and the 125 GeV boson

quarks, as well as the generation of quark mixing angles, both long-standing challenges for ETC theories. Standard-model-singlet neutrinos are assigned to ETC representations that provide a similar suppression of neutrino Dirac masses, as well as the possibility of a realistic seesaw mechanism with no mass scale above the highest ETC scale of roughly

Towards multi-scale dynamics on the baryonic branch of Klebanov-Strassler

10^3

Lectures on Walking Technicolor, Holography, and Gauge/Gravity Dualities

TeV. A simple model based on the ETC group SU(5) is constructed and analyzed. This model leads to non-trivial, but not realistic mixing angles in the quark and lepton sectors. It can also produce sufficiently light neutrinos, although not simultaneously with a realistic quark spectrum. We discuss several aspects of the phenomenology of this class of models.

Flavor-changing processes in extended technicolor

We discuss the physics potential of intermediate

Multiscale confining dynamics from holographic RG flows

L\ensuremath{\sim}20\char21{}30\mathrm{km}