Meson spectroscopy, resonances and scattering on the lattice

New Resonances and Meson Spectroscopy at BaBar and Belle

In 2003, two new resonances were discovered by the BaBar and CLEO experiments: the D∗ s0(2317) and Ds1(2460) mesons [3]. These two resonances are very narrow, and have masses well below what was predicted by the potential model. These states are very well known experimentally: masses are measured with an error below 2 MeV/c, 95% confidence level upper limits on widths are about 4 MeV ; J quantu...

Charmed Meson Scattering from Lattice QCD

Scalar Meson Spectroscopy with Lattice Staggered Fermions

Nucleon Resonances in Meson Nucleon Scattering with Strangeness Production

An effective Lagrangian model in a coupled channels framework is applied to extract nucleon resonance parameters. In the K-matrix approximation, we simultaneously analyze all the available data for the transitions from πN to five possible meson-baryon final states, πN, ππN, ηN,KΛ, and KΣ, in the energy range from πN threshold up to √ s = 2 GeV. In this work, we focus our efforts on the KΣ chann...

Meson Resonances

Bubble chambers have played an immensely important role in developing our understanding of meson resonances. As a matter of fact, if we look at the four lowest lying meson nonets: 0 +, 1-, 2 ++, and 1 ++, all the 27 states in the last three nonets were discovered via the bubble chamber technique. In addi t ion , their spins and par i t ies were also determined in bubble chamber experiments. Bub...