Lattice2010

Session

Parallel 45: Hadron spectroscopy

17 Jun 2010, 14:30

Villasimius, Sardinia

295. Electromagnetic splittings of charged and neutral mesons from improved staggered quarks

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...

322. Isopin breaking study on lattice

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...

209. Electromagnetic corrections to light hadron masses

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.

93. D_s meson spectroscopy

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...

294. Study of the newly discovered mesons in the charm region with chiral fermions.

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...