Chinese Physics C > 2000, Vol. 24 > Issue(6): 593-608

Absolute Measurement of Important Branching Fractions of the D_sMeson

Institute of High Energy Physics, The Chinese Academy of Science, Beijing, 100039, China

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Abstract：
Absolute measurement of branching fractions of purely leptonic decay, semi-leptonic decay and φπ ⁺decay of the D _smeson at a c.m. energy of 4.03 GeV were completed from the BES experiment at the BEPC electron-positron collider. The method by using combined confidence level for pion and kaon separation, the D _ssingle and double tagging technology, and the maximum likelihood functions in the estimate of the D _sbranching fractions are described in details. Discussion and comments on these physics results are made. Prospect for improved measurement of D _sphysics in future is also given.

References

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ZHANG ChangChun, LI WeiGuo, MAO HuiShun, GU JianHui, LI XiaoNan and RONG Gang. Absolute Measurement of Important Branching Fractions of the D _sMeson[J]. Chinese Physics C, 2000, 24(6): 593-608.

ZHANG ChangChun, LI WeiGuo, MAO HuiShun, GU JianHui, LI XiaoNan and RONG Gang. Absolute Measurement of Important Branching Fractions of the D _sMeson[J]. Chinese Physics C, 2000, 24(6): 593-608. shu

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Received: 1999-08-13
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Absolute Measurement of Important Branching Fractions of the D_sMeson

Corresponding author:ZHANG ChangChun,

Institute of High Energy Physics, The Chinese Academy of Science, Beijing, 100039, China

Received Date:1999-08-13
Accepted Date:1900-01-01
Available Online:2000-06-05

Abstract:Absolute measurement of branching fractions of purely leptonic decay, semi-leptonic decay and φπ⁺decay of the D_smeson at a c.m. energy of 4.03 GeV were completed from the BES experiment at the BEPC electron-positron collider. The method by using combined confidence level for pion and kaon separation, the D_ssingle and double tagging technology, and the maximum likelihood functions in the estimate of the D_sbranching fractions are described in details. Discussion and comments on these physics results are made. Prospect for improved measurement of D_sphysics in future is also given.