Lattice2010

Session

Parallel 21: Hadron spectroscopy

15 Jun 2010, 08:30

Villasimius, Sardinia

147. Glueballs in the radiative J/psi decays

Ying Chen (Institute of High Energy Physics, Chinese Academy of Sciences, China)

15/06/2010, 08:30

Hadron spectroscopy

In the quenched approximation, glueball-vector-current-Jpsi three point functions are calculated on an anisotropic lattice with very high statistics. Using the relevant form factors derived from these three point functions, we also give a prediction of the radiative decay widths of J/psi to scalar and pseudoscalar glueballs.

116. Rho decay from twisted mass fermions

Xu Feng (NIC, DESY)

15/06/2010, 08:50

Hadron spectroscopy

We calculate the P-wave pion-pion scattering phase in the rho decay channel using two flavors of maximally twisted mass fermions at pion masses ranging from 290 MeV to 480 MeV and lattice spacings of 0.079 fm and 0.063 fm. Making use of finite-size methods, we evaluate the pion-pion scattering phase in the center-of-mass frame and two moving frames. Using all three frames, we find a good...

153. Calculatin of $\rho$ meson decay width from the PACS-CS configurations

Naruhito Ishizuka (University of Tsukuba)

15/06/2010, 09:10

Hadron spectroscopy

We present our results of the $\rho$ meson decay width estimated from the scattering phase shift for $I=1$ two pion system. Calculations are carried out with $N_f=2+1$ gauge configurations previously generated by the PACS-CS Collaboration with the Iwasaki gauge action and nonperturbatively $O(a)$-improved Wilson fermion at $m_\pi/m_\rho=0.46$ on $32\times 64$ ($La=2.9 fm$). The...

296. Extracting resonance parameters from lattice data (Part I)

Pietro Giudice (Trinity College Dublin)

15/06/2010, 09:30

Hadron spectroscopy

Monte Carlo simulations of the 4d O(4) model in the broken phase are performed to determine the parameters of a resonance. We discuss the applicability of a method, based on the probability distribution concept, useful in the realistic case of a large width resonance. The application to study the QCD hadron spectrum is discussed.

292. Extracting resonance parameters from lattice data: Part II

Darrán McManus (Trinity College, Dublin, Ireland)

15/06/2010, 09:50

Hadron spectroscopy

The standard method for extracting resonance parameters on the lattice is through Luscher's formula. We study the application of this formula to the 4d O(4) sigma model and contrast it with the recently proposed probability distribution method. Connections to resonances in QCD are discussed.