Direct measurement of theDsbranching fraction to φπ

Publisher Website

1 October 1995

journal article
research article
Published by American Physical Society (APS) in Physical Review D

Vol. 52 (7) , 3781-3784
https://doi.org/10.1103/physrevd.52.3781

Abstract

The Beijing Spectrometer (BES) Collaboration has observed exclusive pair production of

D_{s}

mesons at the Beijing Electron-Positron Collider (BEPC) at a center-of-mass energy of 4.03 GeV. The

D_{s}

mesons are detected in the φ

π^{+}

, K¯

{}^{* 0}

K^{+}

, and K¯

{}^{0}

K^{+}

decay modes; two fully reconstructed events yield the value (3.

9_{- 1.9 - 1.1}^{+ 5.1 + 1.8}

)% for the

D_{s}

branching fraction to φπ. This is the first direct, model-independent measurement of this quantity.

Keywords

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