18-24 June 2017
Palacio de Congresos
Europe/Madrid timezone
Home > Timetable > Session details > Contribution details

Contribution Parallel

Seminarios 6+7
Physics Beyond the Standard Model

Testing a non-perturbative mechanism for elementary fermion mass generation: lattice setup.

Speakers

  • Mr. Marco GAROFALO

Primary authors

Co-authors

  • Dr. Stefano CAPITANI (Goethe-Universität Frankfurt am Main - Institut für Theoretische Physik)
  • Dr. Giulia Maria DE DIVITIIS (Dipartimento di Fisica, Università di Roma “Tor Vergata” and INFN, Sezione di Roma 2, Rome, Italy))
  • Dr. Petros DIMOPOULOS (Centro Fermi - Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi c/o Dipartimento di Fisica, Università di Roma “Tor Vergata”)
  • Prof. Roberto FREZZOTTI (Dipartimento di Fisica, Università di Roma “Tor Vergata” and INFN, Sezione di Roma 2, Rome. Italy)
  • Dr. Bastian KNIPPSCHILD (Institut für Strahlen-und Kernphysik (Theorie) Bethe Center for Theoretical Physics, Universität Bonn Germany)
  • Dr. Bartosz KOSTRZEWA (Institut für Strahlen-und Kernphysik (Theorie) Bethe Center for Theoretical Physics, Universität Bonn Germany)
  • Dr. Ferenc PITTLER (Institut für Strahlen-und Kernphysik (Theorie) Bethe Center for Theoretical Physics, Universität Bonn Germany)
  • Prof. Giancarlo ROSSI (Dipartimento di Fisica, Università di Roma “Tor Vergata”and INFN, Sezione di Roma 2 & Centro Fermi - Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi)
  • Prof. Carsten URBACH (Institut für Strahlen-und Kernphysik (Theorie) Bethe Center for Theoretical Physics, Universität Bonn Germany)

Content

In this contribution we lay down a lattice setup that allows for the non-perturbative study of a field theoretical model where a SU(2) fermion doublet, subjected to non-Abelian gauge interactions, is also coupled to a complex scalar field doublet via a Yukawa and an “irrelevant” Wilson-like term. Using naive fermions in quenched approximation and based on the renormalized Ward identities induced by purely fermionic chiral transformations, lattice observables are discussed that enable: a) in the Wigner phase, the determinations of the critical Yukawa coupling value where the purely fermionic chiral transformation become a symmetry up to lattice artifact; b) in the Nambu-Goldstone phase of the resulting critical theory, a stringent test of the actual generation of a fermion mass term of non-perturbative origin. A soft twisted fermion mass term is introduced to circumvent the problem of exceptional configurations.