Chinese Physics C > 1996, Vol. 20 > Issue(3): 193-203

Measurement of D_sDecay Constant

BES Collaboration

Institute of High Energy Physics, The Chinese Academy of Sciences,Beijing 100039

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Abstract：
Using the method of tabing a μ first, then checking the recoil side to see if it is a D _smeson, two D _s→μv and three D _s→τv→μvvv candidate events are found from a data sample corresponding to 22.3ph ^－1, which has been collected at BES at E _cm=4.03GeV.The absolute branching ratio of D _sleptonic decay are determined to be Br(D _s→μv)=(0.72 ^+0.70 _－0.44)% and Br(D _s→τv)=(14+11－8)%. And the D _sdecay constant which is independent of any model is given as f _Ds=(355 ⁺⁹⁶⁺²⁸ _－90－28)MeV.

References

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BES Collaboration. Measurement of D _sDecay Constant[J]. Chinese Physics C, 1996, 20(3): 193-203.

BES Collaboration. Measurement of D _sDecay Constant[J]. Chinese Physics C, 1996, 20(3): 193-203. shu

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Received: 1900-01-01
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

Measurement of D_sDecay Constant

BES Collaboration

Institute of High Energy Physics, The Chinese Academy of Sciences,Beijing 100039

Received Date:1900-01-01
Accepted Date:1900-01-01
Available Online:1996-03-05

Abstract:Using the method of tabing a μ first, then checking the recoil side to see if it is a D_smeson, two D_s→μv and three D_s→τv→μvvv candidate events are found from a data sample corresponding to 22.3ph^－1, which has been collected at BES at E_cm=4.03GeV.The absolute branching ratio of D_sleptonic decay are determined to be Br(D_s→μv)=(0.72^+0.70_－0.44)% and Br(D_s→τv)=(14+11－8)%. And the D_sdecay constant which is independent of any model is given as f_Ds=(355⁺⁹⁶⁺²⁸_－90－28)MeV.