ep - p h / 03 07 31 0 v 1 2 5 Ju l 2 00 3 Heavy Meson Description with a Screened Potential

ar X iv : h ep - p h / 03 07 03 8 v 1 2 J ul 2 00 3 1 Scalar meson exchange in Φ → P 0 P 0 γ decays ∗

ar X iv : h ep - p h / 03 12 16 5 v 1 1 2 D ec 2 00 3 Screened potential and the baryon spectrum

We show that in a quark model scheme the use of a screened potential, suggested by lattice QCD, instead of an infinitely rising one with the in-terquark distance, provides a more adequate description of the high-energy baryon spectrum. In particular an almost perfect parallelism between the predicted and observed number of states comes out throwing new light about the so-called missing resonanc...

ep - p h / 07 03 27 2 v 1 2 6 M ar 2 00 7 Structure of Light Scalar Mesons from D s and D 0 Non - Leptonic Decays

Non-leptonic D meson decays may provide a reliable testbed for the multiquark interpretation of light scalar mesons. In this letter we consider D s decay and show that a 4-quark f 0 (980) meson could induce a decay pattern, which is forbidden for a q ¯ q constituent structure. Experimental tests to probe such possibilities are within reach in the near future.

X iv : h ep - p h / 03 11 27 5 v 1 2 1 N ov 2 00 3 Updated analysis of meson - nucleon sigma terms in the perturbative chiral quark model

Updated analysis of meson-nucleon sigma terms in the perturbative chiral quark model Abstract We present an updated analysis of meson-baryon sigma terms in the per-turbative chiral quark model, which is based on effective chiral Lagrangian. The new feature concerns the inclusion of excited states in the quark prop-agator. Its influence on meson loops is shown to lead in particular for the pion-...

ar X iv : h ep - l at / 0 51 00 31 v 2 1 0 Ju l 2 00 6 Meson correlation functions at high temperatures

We present preliminary results for the correlationand spectral functions of different meson channels on the lattice. The main focus lies on gaining control over cut-off as well as on the finite-volume effects. Extrapolations of screening masses above the deconfining temperature are guided by the result of the free (T = ∞) case on the lattice and in the continuum. We study the quenched non-pertu...