Measurement of Inclusive Semileptonic Branching Fractions for D－→e－X and D0→e－X

BES Collaboration

Chinese Physics C> 2002, Vol. 26> Issue(6) : 547-556

Measurement of Inclusive Semileptonic Branching Fractions for D^－→e^－X and D⁰→e^－X

BES Collaboration

Institute of High Energy Physics, CAS, Beijing 100039, China

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Abstract：
We report a measurement of the absolutely inclusive semileptonic branching fractions of D^－ and D⁰ mesons, using a data sample of 22.3pb^－1 collected with BES detector at BEPC e⁺e^－ Collider at s=4.03GeV and based on the method of "combinative D⁺ and D⁰ single and double tags". The measured values of the branching fractions for D^－→e^－X and D⁰→e^－X are (21.8±8.5±4.2)% and (8.9±3.0±1,6)%, respectively. The measured ratio of the branching fractions is BF(D^－→e^－X)/BF(D⁰→e^－X)=2.4±1.7±0.8.

References

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BES Collaboration. Measurement of Inclusive Semileptonic Branching Fractions for D^－→e^－X and D⁰→e^－X[J]. Chinese Physics C, 2002, 26(6): 547-556.

BES Collaboration. Measurement of Inclusive Semileptonic Branching Fractions for D^－→e^－X and D⁰→e^－X[J]. Chinese Physics C, 2002, 26(6): 547-556. shu

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Received: 2001-09-11
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 Inclusive Semileptonic Branching Fractions for D^－→e^－X and D⁰→e^－X

BES Collaboration

Institute of High Energy Physics, CAS, Beijing 100039, China

Received Date: 2001-09-11
Accepted Date: 1900-01-01
Available Online: 2002-06-05

Abstract: We report a measurement of the absolutely inclusive semileptonic branching fractions of D^－ and D⁰ mesons, using a data sample of 22.3pb^－1 collected with BES detector at BEPC e⁺e^－ Collider at s=4.03GeV and based on the method of "combinative D⁺ and D⁰ single and double tags". The measured values of the branching fractions for D^－→e^－X and D⁰→e^－X are (21.8±8.5±4.2)% and (8.9±3.0±1,6)%, respectively. The measured ratio of the branching fractions is BF(D^－→e^－X)/BF(D⁰→e^－X)=2.4±1.7±0.8.