An investigation of D{sup +}{yields}{tau}{sup +}{nu}

Journal Article · Thu Jun 01 00:00:00 EDT 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.73.112005· OSTI ID:20774777

Rubin, P ^[1]; Cawlfield, C; Eisenstein, B I; Karliner, I; Kim, D; Lowrey, N; Naik, P; Sedlack, C; Selen, M; White, E J; Wiss, J ^[2]; Shepherd, M R ^[3]; Besson, D ^[4]; Pedlar, T K ^[5]; Cronin-Hennessy, D; Gao, K Y; Gong, D T; Hietala, J; Kubota, Y; Klein, T ^[6]

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1. George Mason University, Fairfax, Virginia 22030 (United States)
2. University of Illinois, Urbana-Champaign, Illinois 61801 (United States)
3. Indiana University, Bloomington, Indiana 47405 (United States)
4. University of Kansas, Lawrence, Kansas 66045 (United States)
5. Luther College, Decorah, Iowa 52101 (United States)
6. University of Minnesota, Minneapolis, Minnesota 55455 (United States)

We test whether or not the {tau} lepton manifests the same couplings as the {mu} lepton by investigating the relative decay rates in purely leptonic D{sup +} meson decays. We use 281 pb{sup -1} of data accumulated at the {psi}(3770) resonance with the CLEO-c detector, to limit B(D{sup +}{yields}{tau}{sup +}{nu})<2.1x10{sup -3} at 90% confidence level (C.L.), thus allowing us to place the first upper limit on the ratio R={gamma}(D{sup +}{yields}{tau}{sup +}{nu})/{gamma}(D{sup +}{yields}{mu}{sup +}{nu}). The ratio of R to the standard model expectation of 2.65 then is <1.8 at 90% C.L., consistent with the prediction of lepton universality.

• OSTI ID: 20774777
• Journal Information: Physical Review. D, Particles Fields, Vol. 73, Issue 11; Other Information: DOI: 10.1103/PhysRevD.73.112005; (c) 2006 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
CESR STORAGE RING
D PLUS MESONS
MULTIPARTICLE SPECTROMETERS
MUONS
NEUTRINOS
PARTICLE DECAY
PARTICLE IDENTIFICATION
PSI-3770 MESONS
RESONANCE PARTICLES
STANDARD MODEL
TAU PARTICLES