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m_pi and N_c dependence of resonances from Unitarized Chiral Perturbation Theory
G. Rios, C. Hanhart, J. R. Pelaez
We review our studies on the rho and sigma resonances properties derived from the Inverse Amplitude Method. In particular, we study the leading behavior of the resonances m…
Heavy quarkonium: progress, puzzles, and opportunities
N. Brambilla, S. Eidelman, B. K. Heltsley +64
A golden age for heavy quarkonium physics dawned a decade ago, initiated by the confluence of exciting advances in quantum chromodynamics (QCD) and an explosion of related experime…
QCD tests from pion reactions on few-nucleon systems
C. Hanhart
We show on two examples, namely a calculation for charge symmetry breaking in pn->d pi^0 that allows one to extract the quark mass difference induced part of the proton--neutron ma…
Light meson mass dependence of the positive parity heavy-strange mesons
Martin Cleven, Feng-Kun Guo, Christoph Hanhart +1
We calculate the masses of the resonances D_{s0}^*(2317) and D_{s1}(2460) as well as their bottom partners as bound states of a kaon and a D^*- and B^*-meson, respectively, in unit…
The reaction pi+ p --> K+ Sigma+ in a unitary coupled-channels model
M. Döring, C. Hanhart, F. Huang +3
Elastic pi N scattering and the reaction pi+ p --> K+ Sigma+ are described simultaneously in a unitary coupled-channels approach which respects analyticity. SU(3) flavor symmetry i…
Effect of charmed meson loops on charmonium transitions
Feng-Kun Guo, Christoph Hanhart, Gang Li +2
The effects of intermediate charmed mesons on charmonium transitions with the emission of one pion or eta are studied systematically. Based on a non-relativistic effective field th…