The channel \$D\_s^+pn\$ is the only kinematically allowed baryonic D
decay. It proceeds solely through the W-annihilation topology. Hence, a recent
observation of this mode by CLEO will shed light on the dynamics of
W-annihilation. At the short-distance level, its branching ratio is very small,
of order \$10^-6\$, owing to chiral suppression. It receives long-distance
contributions through final-state scattering of the leading tree and
color-suppressed amplitudes. Assuming that the long-distance enhancement of
W-annihilation in the baryonic D decay is similar to that in the mesonic
\$D\_s^+\$ decay, where the latter can be obtained from the analysis of the
diagrammatic approach, we find that \$D\_s^+pn\$ becomes visible. The
observation of this baryonic D decay implies the dynamical enhancement of the
W-annihilation topology in the \$D\_s^+\$ decay.
%0 Journal Article
%1 Chen2008Baryonic
%A Chen, Chuan-Hung
%A Cheng, Hai-Yang
%A Hsiao, Yu-Kuo
%D 2008
%K bpp, lhcb, pheno
%T Baryonic D Decay \$D\_s^+pn\$ and Its Implication
%U http://arxiv.org/abs/0803.2910
%X The channel \$D\_s^+pn\$ is the only kinematically allowed baryonic D
decay. It proceeds solely through the W-annihilation topology. Hence, a recent
observation of this mode by CLEO will shed light on the dynamics of
W-annihilation. At the short-distance level, its branching ratio is very small,
of order \$10^-6\$, owing to chiral suppression. It receives long-distance
contributions through final-state scattering of the leading tree and
color-suppressed amplitudes. Assuming that the long-distance enhancement of
W-annihilation in the baryonic D decay is similar to that in the mesonic
\$D\_s^+\$ decay, where the latter can be obtained from the analysis of the
diagrammatic approach, we find that \$D\_s^+pn\$ becomes visible. The
observation of this baryonic D decay implies the dynamical enhancement of the
W-annihilation topology in the \$D\_s^+\$ decay.
@article{Chen2008Baryonic,
abstract = {The channel \$D\_s^+\to p\bar n\$ is the only kinematically allowed baryonic D
decay. It proceeds solely through the W-annihilation topology. Hence, a recent
observation of this mode by CLEO will shed light on the dynamics of
W-annihilation. At the short-distance level, its branching ratio is very small,
of order \$10^{-6}\$, owing to chiral suppression. It receives long-distance
contributions through final-state scattering of the leading tree and
color-suppressed amplitudes. Assuming that the long-distance enhancement of
W-annihilation in the baryonic D decay is similar to that in the mesonic
\$D\_s^+\$ decay, where the latter can be obtained from the analysis of the
diagrammatic approach, we find that \$D\_s^+\to p\bar n\$ becomes visible. The
observation of this baryonic D decay implies the dynamical enhancement of the
W-annihilation topology in the \$D\_s^+\$ decay.},
added-at = {2019-02-23T22:09:48.000+0100},
archiveprefix = {arXiv},
author = {Chen, Chuan-Hung and Cheng, Hai-Yang and Hsiao, Yu-Kuo},
biburl = {https://www.bibsonomy.org/bibtex/2a39ebfb61cfe568a1ed974d022f0a9a3/cmcneile},
citeulike-article-id = {4500424},
citeulike-linkout-0 = {http://arxiv.org/abs/0803.2910},
citeulike-linkout-1 = {http://arxiv.org/pdf/0803.2910},
day = 16,
eprint = {0803.2910},
interhash = {cddb068d06951a7263a66478a6dc3474},
intrahash = {a39ebfb61cfe568a1ed974d022f0a9a3},
keywords = {bpp, lhcb, pheno},
month = apr,
posted-at = {2009-05-10 13:38:36},
priority = {2},
timestamp = {2019-02-23T22:15:27.000+0100},
title = {{Baryonic D Decay \$D\_s^+\to p\bar n\$ and Its Implication}},
url = {http://arxiv.org/abs/0803.2910},
year = 2008
}