Conveners
Session 10
- Giuseppe Gonnella (BA)
Polar flocking is one of the simplest but at the same time richer examples of collective behaviour in active matter systems. Its physical behaviour — stemming from the spontaneous breaking of a continuous symmetry and the nonequilibrium coupling of density and orientation fluctuations — has been thoroughly investigated in the last two decades, and we now have a good understanding of the...
We present a novel framework to compute the non-perturbative decay width of pseudoscalar mesons into charged leptons by means of Lattice QCD calculations, including for the first time the radiative emission of a photon. Together with the non-perturbative determination of the virtual photon corrections to the processes, this allow accurate predictions at O(αem) for leptonic decay rates for...
Using lattice simulations we give evidence of the existence of a non-perturbative mechanism for elementary particle mass generation in models with gauge fields, fermions and scalars, if an exact invariance forbids power divergent fermion masses and fermionic chiral symmetries broken at UV scale are maximally restored. We show that in the Nambu-Goldstone phase a fermion mass term, unrelated to...
In this work we investigate the relation between the realization of center symmetry and the theta-dependence of
SU(3) and SU(4) Yang-Mills theories defined on $R^3 \times S^1$. In particular we use the double-traced deformed version of Yang-Mills theory,
in which extra pieces coupled to the traces of the powers of Polyakov loop are addedd to the standard action in order
recover center...
Active matter, popularized by the collective motion of bird flocks, constitutes a novel and rapidly growing field gathering interests and contributions from very diverse communities. In particular, it offers new promises in organizing elementary units at different scales in ways that are unavailable to equilibrium systems, like clustering and phase separation without attractive interactions,...
