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Measurement of the branching ratio of ¯ B → D ( * ) τ − ¯ ν τ relative to ¯ B → D ( * ) ℓ − ¯ ν ℓ decays with hadronic tagging at Belle

Title
Measurement of the branching ratio of ¯ B → D ( * ) τ − ¯ ν τ relative to ¯ B → D ( * ) ℓ − ¯ ν ℓ decays with hadronic tagging at Belle
Author
천병구
Keywords
MESON DECAYS; B-DECAYS; DETECTOR; QCD
Issue Date
2015-10
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW D, v. 92, NO 7, Page. 72014-72014
Abstract
We report a measurement of the branching fraction ratios R(D)(()*()) of (B) over bar -˃ D-(*())tau(-)(nu) over bar (tau) relative to (B) over bar -˃ D-(*())l(-)(nu) over barl (where l = e or mu) using the full Belle data sample of 772 x 10(6)B (B) over bar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The measured values are R(D) = 0.375 +/- 0.064(stat) +/- 0.026(syst) and R(D*) = 0.293 +/- 0.038 (stat) +/- 0.015 (syst). The analysis uses hadronic reconstruction of the tag-side B meson and purely leptonic t decays. The results are consistent with earlier measurements and do not show a significant deviation from the standard model prediction.
URI
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.92.072014http://hdl.handle.net/20.500.11754/28063
ISSN
2470-0010; 2470-0029
DOI
10.1103/PhysRevD.92.072014
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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