Aaron Torok
(Indiana U.)
17/06/2010, 14:30
Hadron spectroscopy
We extend MILC's initial study of the electromagnetic splittings of charged and neutral mesons, and the violation of Dashen’s theorem. Meson masses are calculated using the MILC Nf = 2 + 1, staggered SU(3) gauge configurations, and independently generated U(1) gauge configurations. The meson correlators are calculated using SU(3)xU(1) gauge fields. A large fraction of the meson correlators are...
Taku Izubuchi
(Brookhaven National Laboratory & RIKEN-BNL Research Center)
17/06/2010, 14:50
Hadron spectroscopy
We investigate isopin breaking effects due to different
masses and electric charges between up and down quarks
non-perturbatively using lattice QCD+QED with
domain wall quarks. Individual up, down, and strange quark masses
are determined using $K^\pm, K^0,$ and $\pi^\pm$ meson
masses as inputs.
New challenges include calculations for the
electromagnetic (EM) correction to the...
Antonin Portelli
(Centre de Physique Théorique de Marseille (France))
17/06/2010, 15:10
Hadron spectroscopy
At the precision reached in current lattice QCD calculations,
electromagnetic effects are becoming numerically relevant. We will
present preliminary results for electromagnetic corrections to light
hadron masses, based on simulations in which a U(1) degree of freedom
is superimposed on N_f=2+1 QCD configurations.
Daniel Mohler
(TRIUMF)
17/06/2010, 15:30
Hadron spectroscopy
Preliminary results are presented for the spectrum of D_s mesons using the
2+1 flavor Clover-Wilson configurations made available by the PACS-CS
collaboration. For the heavy quark, the Fermilab method is employed and
we report on the tuning of the charm-quark hopping parameter. As
our main focus, we present initial results for the spectrum of P-wave
states, where previous results have...
Ming Gong
(University of Kentucky)
17/06/2010, 15:50
Hadron spectroscopy
We investigate if the newly discovered mesons in the charm region, such as
D_s(2317), X(3872), Z^+(4430), are tetraquark mesoniums. With quarks and
antiquarks in periodic and antiperiodic boundary conditions respectively in
the spatial directions, we try to find out if the ground states from the
tetraquark interpolation fields are one meson or two meson states. We use
valence overlap...
