Decay width of $d^*(2380) \to NN \pi$ process in a chiral constituent quark model - INSPIRE

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Decay width of $d^*(2380) \to NN \pi$ process in a chiral constituent quark model

Feb 13, 2017

4 pages

Published in:

Phys.Lett.B 769 (2017) 223-226

Published: Jun 10, 2017

e-Print:

1702.03658 [nucl-th]

DOI:

10.1016/j.physletb.2017.03.058

View in:

ADS Abstract Service

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Abstract: (Elsevier)

The width of three-body single-pion decay process d⁎→NNπ0,± is calculated by using the d⁎ wave function obtained from our chiral SU(3) constituent quark model calculation. The effect of the dynamical structure on the width of d⁎ is taken into account in both the single ΔΔ channel and coupled ΔΔ+CC 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 d⁎→NNπ is about several hundred keV, while in the single ΔΔ channel it is just about 2∼3 MeV . We, therefore, conclude that the partial width in the single-pion decay process of d⁎ is much smaller than the widths in its double-pion decay processes. Our prediction may provide a criterion for judging different interpretations of the d⁎ structure, as different pictures for the d⁎ may result quite different partial decay width.

Note:

6 pages, 1 figure, and 1 table, typos corrected

d⁎(2380)
Chiral quark model
Strong decay
Single-pion decay
[formula omitted]
quark model: constituent
structure
numerical calculations
branching ratio
coupled channel

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