Measurement of the pseudoscalar decay constant f{sub D{sub s}} using D{sub s}{sup +}{yields}{tau}{sup +}{nu}, {tau}{sup +}{yields}{rho}{sup +}{nu} decays

Journal Article · Tue Dec 01 00:00:00 EST 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.80.112004· OSTI ID:21313442

Naik, P; Rademacker, J ^[1]; Asner, D M; Edwards, K W; Randrianarivony, K; Reed, J; Robichaud, A N; Tatishvili, G; White, E J ^[2]; Briere, R A; Vogel, H ^[3]; Onyisi, P U. E.; Rosner, J L ^[4]; Alexander, J P; Cassel, D G; Ehrlich, R; Fields, L; Gibbons, L; Gray, S W; Hartill, D L ^[5]

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1. University of Bristol, Bristol BS8 1TL (United Kingdom)
2. Carleton University, Ottawa, Ontario, Canada K1S 5B6 (Canada)
3. Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 (United States)
4. University of Chicago, Chicago, Illinois 60637 (United States)
5. Cornell University, Ithaca, New York 14853 (United States)

Analyzing 600 pb{sup -1} of e{sup +}e{sup -} collisions at 4170 MeV center-of-mass energy with the CLEO-c detector, we measure the branching fraction B(D{sub s}{sup +}{yields}{tau}{sup +}{nu})=(5.52{+-}0.57{+-}0.21)% using the {tau}{sup +}{yields}{rho}{sup +}{nu} decay mode. Combining with other CLEO measurements of B(D{sub s}{sup +}{yields}{tau}{sup +}{nu}) we determine the pseudoscalar decay constant f{sub D{sub s}}=(259.7{+-}7.8{+-}3.4) MeV consistent with the value obtained from our D{sub s}{sup +}{yields}{mu}{sup +}{nu} measurement of (257.6{+-}10.3{+-}4.3) MeV. Combining these measurements we find a value of f{sub D{sub s}}=(259.0{+-}6.2{+-}3.0) MeV, that differs from the most accurate prediction based on unquenched lattice gauge theory of (241{+-}3) MeV by 2.4 standard deviations. We also present the first measurements of B(D{sub s}{sup +}{yields}K{sup 0}{pi}{sup +}{pi}{sup 0})=(1.00{+-}0.18{+-}0.04)%, and B(D{sub s}{sup +}{yields}{pi}{sup +}{pi}{sup 0}{pi}{sup 0})=(0.65{+-}0.13{+-}0.03)%, and measure a new value for B(D{sub s}{sup +}{yields}{eta}{rho}{sup +})=(8.9{+-}0.6{+-}0.5)%.

• OSTI ID: 21313442
• Journal Information: Physical Review. D, Particles Fields, Vol. 80, Issue 11; Other Information: DOI: 10.1103/PhysRevD.80.112004; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANCHING RATIO
CENTER-OF-MASS SYSTEM
CESR STORAGE RING
D S MESONS
ELECTRON-POSITRON COLLISIONS
FORECASTING
GAUGE INVARIANCE
GEV RANGE 01-10
KAONS NEUTRAL
MEV RANGE 100-1000
MULTIPARTICLE SPECTROMETERS
MUONS
NEUTRINOS
PARTICLE DECAY
PARTICLE IDENTIFICATION
PIONS NEUTRAL
PIONS PLUS
PSEUDOSCALAR MESONS
TAU PARTICLES