Quark ModelExcited StatesMass SpectraMesonsRelativistic RangeIt is shown that new experimental data do support the theoretical prediction on possible existence of a new (pi)-meson excited state with mass in the interval M(sub (pi)) = 700-800 MeV. This prediction was obtained in the framework ...
is calculated in the model of dominance of quark loop anomalies. We investigate the contribution of the scalar meson delta(980) for two versions of its quark structure: a) the delta meson is a /sup 2/P/sub 0/ state of a quark-antiquark pair, b) the delta meson is a quark molecule...
The composition of the eta and eta' mesons has long been a source of discussion and is of current interest with new experimental results appearing. We investigate what can be learnt from a number of different processes: V to P gamma and ... ...
Measurement of C P Asymmetry in a Time-Dependent Dalitz Analysis of B 0 → ( ρπ ) 0 and a Constraint on the Quark Mixing Matrix Angle ϕ 2 We present a measurement of CP asymmetry using a time-dependent Dalitz plot analysis of B0-->pi+pi-pi0 decays based on a 414 fb(-1)...
For three decades Jaffe has argued for a tetraquark composition, while others have claimed it is largely a glueball. A key pointer to its nature is its coupling to two photons. Consequently, there have been recent proposals to observe this important scalar hiding in $\\gamma\\gammao\\pi^0...
The strange border of the QCD phasesquarkoniumtensor mesonradiative decayfactorizationWe address the flavour composition along the border between the hadronic ... S Kabana - The European Physical Journal C - Particles and Fields 被引量: 21发表: 2001年 Dimensional asymptotics of determinants onSn,...
meson. Predictions for the pion decay widths of the L = 1 D meson states have also been made in ref. [3]. In case of S-wave decay of these states, it is shown that in order to avoid large overestimates it is important to include also two-quark exchange charge amplitudes associated ...
Exclusive process $^{2}\\mathrm{H}$(e,e'p)${\\mathit{N}}^{\\mathrm{*}}$ as a tool for investigation of the quark structure of the deuteron The exclusive $^{2}mathrm{H}$(e,e'p)${mathit{N}}^{mathrm{*}}$ process at CEBAF energies, with the missing mass coincidenc...
couplings, the pseudoscalar meson (ps) mixing properties in the octet-singlet [ 43 , 44 , 45 ] and quark flavor [ 46 , 47 , 48 ] basis parameterizations have been analyzed, leading to a satisfactory comparison with expectations. among the other processes involving the properties of the [ ...
Since the quark masses in the lQCD simulation are not yet physical, the non-interacting energy levels of the lQCD are slightly shifted upward compared to those calculated theoretically using physical meson masses. Apparently, the lQCD results are consistent with -UChPT [28], but not X-UChPT...