Relatore
Marcus Petschlies
(HISKP, Universität Bonn)
Descrizione
I report on a pilot lattice simulation to study hadronic parity violation with lattice QCD, in particular
to calculate the $P$-odd long-range pion-nucleon coupling $h_\pi^1$.
I discuss the implementation of a recently proposed new approach, where the parity-violating Lagrangian
is mapped to a $P$-conserving one, based on the PCAC relation, and the coupling $h_\pi^1$
is extracted from nucleon matrix elements of $P$-conserving 4-quark operators. Barring
renormalization and fermion loop diagrams, we estimate $h^1_\pi = 2.31\, (32)\, 10^{-7}$
at 260 MeV pion mass, already in
fairly good agreement with the recent experimental determination by the NPDGamma collaboration.
Autori principali
Sig.
Aniket Sen
(Bonn University)
Carsten Urbach
(HISKP, Uni Bonn)
Marcus Petschlies
(HISKP, Universität Bonn)
Sig.
Nikolas Schlage
(Bonn University)
