Direct measurement of B(D{sup 0}{yields}{phi}X{sup 0}) and B(D{sup +}{yields}{phi}X{sup +})
- Institute of High Energy Physics, Beijing 100039, People's Republic of China (China)
- Peking University, Beijing 100871, People's Republic of China (China)
- University of Texas at Dallas, Richardson, Texas 75083-0688 (United States)
- University of Science and Technology of China, Hefei 230026, People's Republic of China (China)
- Colorado State University, Fort Collins, Colorado 80523 (United States)
The first measurement of B(D{sup 0}{yields}{phi}X{sup 0}) and an upper limit for B(D{sup +}{yields}{phi}X{sup +}) are determined from 22.3 pb{sup -1} of e{sup +}e{sup -} annihilation data at a c.m. energy of 4.03 GeV. The data were recorded by the Beijing Spectrometer (BES) at BEPC. A recoil charge method is applied to charm threshold data to determine the charge of the D meson in the recoil from 9054{+-}309{+-}416 reconstructed D{sup 0}, D{sup +} mesons. The branching fractions B(D{sup 0}{yields}{phi}X{sup 0})=(1.71{sub -0.71}{sup +0.76}{+-}0.17)%, and B(D{sup +}{yields}{phi}X{sup +})<1.8% are determined from 10 events with a reconstructed D and a recoiling {phi}. In addition, a 90% C.L. upper limit of B(D{sup +}{yields}{phi}e{sup +}X{sup 0})<1.6% is determined from a search for semileptonic decays of the D{sup +}. (c) 2000 The American Physical Society.
- OSTI ID:
- 20217516
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 62, Issue 5; Other Information: PBD: 1 Sep 2000; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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