Marco Cè
(SNS & INFN, Pisa)
19/05/2016, 17:10
We present preliminary results for the topological charge susceptibility of SU(N) Yang–Mills theory in the large-N limit. This observable enters the Witten–Veneziano formula and gives the anomalous contribution to the η' meson mass in this limit. The computation is done on the lattice implementing the gradient flow definition of the topological charge, which is proven to coincide with the...
Dr
Daniele Barducci
(LAPTh, Universite Savoie Mt. Blanc)
19/05/2016, 17:10
Heavy Vector resonances are a general prediction of Composite Higgs Theories, where the Higgs arises as a pseudo Nambu Goldstone Boson. Typically at the LHC these states are sought for via narrow resonant searches, looking for "bumps" in the dilepton invariant mass spectrum. These states can however undergo decays into a pair of top partners in a large and natural range of Composite Higgs...
Petros Dimopoulos
(Centro Fermi, Museo Storico della Fisica e Centro Studi e Ricerche "Enrico Fermi")
19/05/2016, 17:50
We will present precise determinations for the b-quark mass, the quark mass ratios mb/mc and mb/ms as well as the
leptonic B-decay constants employing lattice QCD methods. We use the gauge configurations with four dynamical quark flavors, up/down, strange and charm, generated by the European Twisted Mass Collaboration. Our results, obtained at three values of the lattice spacing, are...
Dr
Carlo Heissenberg
(SNS)
19/05/2016, 17:50
A symmetry breaking mechanism is discussed which exhibits radically different properties compared with the Goldstone and the Higgs mechanisms: the interplay between symmetries of a quantum system and the topology of the manifold of particle configurations can account for both the breaking of an internal symmetry and the presence of an energy gap. Such features are clearly displayed by the...
Ms
Aurora Melis
(RomaTre University of Rome)
19/05/2016, 18:10
In this talk the results of a lattice QCD calculation of the vector mesons decay constants are presented. They are relevant hadronic parameters that characterize the internal structure of vector mesons due to QCD interactions, for instance they can provide phenomenologically good descriptions of non-leptonic decay rates within the factorization approximation. The two previous lattice...
Dr
Viacheslav Emelyanov
(Karlsruhe Institute of Technology)
19/05/2016, 18:10
Far away from black holes, one might expect that quantum field quantization performed in Minkowski space is a good approximation. Indeed, all experimental tests in the particle colliders reveal no deviations so far. Nevertheless, black holes should leave imprints of their presence in quantum processes. In this talk, we shall discuss several imprints of small evaporating black holes in QED in...
