Baryonic D decay Ds+ → p over(n, ̄) and its implication

Chuan Hung Chen, Hai Yang Cheng, Yu Kuo Hsiao

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


The channel Ds+ → p over(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 Ds+ decay, where the latter can be obtained from the analysis of the diagrammatic approach, we find that Ds+ → p over(n, ̄) becomes visible. The observation of this baryonic D decay implies the dynamical enhancement of the W-annihilation topology in the Ds+ decay.

Original languageEnglish
Pages (from-to)326-329
Number of pages4
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number4
Publication statusPublished - 2008 May 29

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Fingerprint Dive into the research topics of 'Baryonic D decay D<sub>s</sub><sup>+</sup> → p over(n, ̄) and its implication'. Together they form a unique fingerprint.

Cite this