Measurement of absolute branching fractions of inclusive semileptonic decays of charm and charmed-strange mesons

Journal Article · Mon Mar 01 00:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.052007· OSTI ID:21409819

Asner, D M; Edwards, K W; Reed, J; Robichaud, A N; Tatishvili, G; White, E J ^[1]; Briere, R A; Vogel, H ^[2]; Onyisi, P U. E.; Rosner, J L ^[3]; Alexander, J P; Cassel, D G; Das, S; Ehrlich, R; Fields, L; Gibbons, L; Gray, S W; Hartill, D L; Heltsley, B K; Hunt, J M ^[4]

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1. Carleton University, Ottawa, Ontario, K1S 5B6 (Canada)
2. Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 (United States)
3. University of Chicago, Chicago, Illinois 60637 (United States)
4. Cornell University, Ithaca, New York 14853 (United States)

We have measured the inclusive semileptonic branching fractions of D{sup 0}, D{sup +}, and D{sub s}{sup +} mesons. For these measurements, we have used the full CLEO-c open-charm data samples, 818 pb{sup -1} at E{sub CM}=3.774 GeV, giving D{sup 0}D{sup 0} and D{sup +}D{sup -} events, and 602 pb{sup -1} at E{sub CM}=4.170 GeV, giving D{sub s}*{sup {+-}D}{sub s}{sup {+-}}events. We obtain B(D{sup 0{yields}}Xe{sup +{nu}}{sub e})=(6.46{+-}0.09{+-}0.11)%, B(D{sup +{yields}}Xe{sup +{nu}}{sub e})=(16.13{+-}0.10{+-}0.29)%, and B(D{sub s}{sup +{yields}}Xe{sup +{nu}}{sub e})=(6.52{+-}0.39{+-}0.15)%, where the first uncertainties are statistical and the second are systematic. From these and lifetimes obtained elsewhere, we obtain the ratios of semileptonic decay widths {Gamma}(D{sup +{yields}}Xe{sup +{nu}}{sub e})/{Gamma}(D{sup 0{yields}}Xe{sup +{nu}}{sub e})=0.985{+-}0.015{+-}0.024 and {Gamma}(D{sub s}{sup +{yields}}Xe{sup +{nu}}{sub e})/{Gamma}(D{sup 0{yields}}Xe{sup +{nu}}{sub e})=0.828{+-}0.051{+-}0.025. The ratio of D{sup +} and D{sup 0} is consistent with the isospin symmetry prediction of unity, and the ratio of D{sub s}{sup +} and D{sup 0} differs from unity, as expected.

• OSTI ID: 21409819
• Journal Information: Physical Review. D, Particles Fields, Vol. 81, Issue 5; Other Information: DOI: 10.1103/PhysRevD.81.052007; (c) 2010 The American Physical Society; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANCHING RATIO
CESR STORAGE RING
D MINUS MESONS
D NEUTRAL MESONS
D S MESONS
ELECTRON NEUTRINOS
FORECASTING
GEV RANGE 01-10
ISOSPIN
LIFETIME
MULTIPARTICLE SPECTROMETERS
PARTICLE IDENTIFICATION
SEMILEPTONIC DECAY
STRANGE MESONS
SYMMETRY
BOSONS
CHARM PARTICLES
CHARMED MESONS
D MESONS
DECAY
DIMENSIONLESS NUMBERS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
GEV RANGE
HADRONS
LEPTONS
MASSLESS PARTICLES
MEASURING INSTRUMENTS
MESONS
NEUTRINOS
PARTICLE DECAY
PARTICLE PROPERTIES
PSEUDOSCALAR MESONS
SPECTROMETERS
STORAGE RINGS
STRANGE PARTICLES
WEAK PARTICLE DECAY