Measurement of B(D{sub s}{sup +}{yields}l{sup +}{nu}) and the decay constant f{sub D{sub S}{sup +}}

Journal Article · Mon Oct 01 00:00:00 EDT 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.76.072002· OSTI ID:21032303

Pedlar, T K ^[1]; Cronin-Hennessy, D; Gao, K Y; Hietala, J; Kubota, Y; Klein, T; Lang, B W; Poling, R; Scott, A W; Smith, A; Zweber, P ^[2]; Dobbs, S; Metreveli, Z; Seth, K K; Tomaradze, A ^[3]; Ernst, J ^[4]; Ecklund, K M ^[5]; Severini, H ^[6]; Love, W; Savinov, V ^[7]

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1. Luther College, Decorah, Iowa 52101 (United States)
2. University of Minnesota, Minneapolis, Minnesota 55455 (United States)
3. Northwestern University, Evanston, Illinois 60208 (United States)
4. State University of New York at Albany, Albany, New York 12222 (United States)
5. State University of New York at Buffalo, Buffalo, New York 14260 (United States)
6. University of Oklahoma, Norman, Oklahoma 73019 (United States)
7. University of Pittsburgh, Pittsburgh, Pennsylvania 15260 (United States)

We examine e{sup +}e{sup -}{yields}D{sub s}{sup -}D{sub s}*{sup +} and D{sub s}*{sup -}D{sub s}{sup +} interactions at 4170 MeV using the CLEO-c detector in order to measure the decay constant f{sub D{sub s}{sup +}}. We use the D{sub s}{sup +}{yields}l{sup +}{nu} channel, where the l{sup +} designates either a {mu}{sup +} or a {tau}{sup +}, when the {tau}{sup +}{yields}{pi}{sup +}{nu}. Analyzing both modes independently, we determine B(D{sub s}{sup +}{yields}{mu}{sup +}{nu})=(0.594{+-}0.066{+-}0.031)%, and B(D{sub s}{sup +}{yields}{tau}{sup +}{nu})=(8.0{+-}1.3{+-}0.4)%. We also analyze them simultaneously to find an effective value of B{sup eff}(D{sub s}{sup +}{yields}{mu}{sup +}{nu})=(0.638{+-}0.059{+-}0.033)% and extract f{sub D{sub s}{sup +}}=274{+-}13{+-}7 MeV. Combining with our previous determination of B(D{sup +}{yields}{mu}{sup +}{nu}), we also find the ratio f{sub D{sub s}{sup +}}/f{sub D{sup +}}=1.23{+-}0.11{+-}0.04. We compare to current theoretical estimates. Finally, we find B(D{sub s}{sup +}{yields}e{sup +}{nu})<1.3x10{sup -4} at 90% confidence level.

• OSTI ID: 21032303
• Journal Information: Physical Review. D, Particles Fields, Vol. 76, Issue 7; Other Information: DOI: 10.1103/PhysRevD.76.072002; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA). CLEO Collaboration; ISSN 0556-2821
• Country of Publication: United States
• Language: English

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