121 research outputs found
Synthesis and properties of shape memory water-borne epoxy and its nanocomposites (形状記憶水性エポキシ及びそのナノコンポジットの創製と性能評価に関する研究)
信州大学(Shinshu university)博士(工学)ThesisDONG YUBING. Synthesis and properties of shape memory water-borne epoxy and its nanocomposites (形状記憶水性エポキシ及びそのナノコンポジットの創製と性能評価に関する研究). 信州大学, 2015, 博士論文. 博士(工学), 甲第642号, 平成27年9月30日授与.doctoral thesi
Decay width of process in a chiral constituent quark model
The width of three-body single-pion decay process is
calculated by using the wave function obtained from our chiral SU(3)
constituent quark model calculation. The effect of the dynamical structure on
the width of is taken into account in both the single
channel and coupled two-channel approximations. Our numerical
result shows that in the coupled-channel approximation, namely, the
hidden-color configuration being considered, the obtained partial decay width
of is about several hundred , while in the single
channel it is just about . We, therefore,
conclude that the partial width in the single-pion decay process of is
much smaller than the widths in its double-pion decay processes. Our prediction
may provide a criterion for judging different interpretations of the
structure, as different pictures for the may result quite different
partial decay width.Comment: 6 pages, 1 figure, and 1 table, typos correcte
Selected strong decays of pentaquark State in a chiral constituent quark model
The newly confirmed pentaquark state has been treated as a weakly
bound state by a well-established chiral constituent quark
model and by a dynamical calculation on quark degrees of freedom where the
quark exchange effect is accounted for. The obtained mass MeV agrees
with data. In this work, the selected strong decays of the state
are studied with the obtained wave function. It is shown that the width of the
decay is overwhelmed and the branching ratios of the
and decays are both less than 1 percentage.Comment: 13 pages, 2 figures, 3 table
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