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순수물리이론 연구단
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New physics contributions in B → πτν and B → τν

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Title
New physics contributions in B → πτν and B → τν
Author(s)
Minoru Tanaka; Ryoutaro Watanabe
Publication Date
2017-01
Journal
Progress of Theoretical and Experimental Physics, v.2017, no.1, pp.013B05 -
Abstract
We study possible new physics contributions in B → πτν and B → τν employing the model-independent effective Lagrangian that describes the quark-level transition b → uτν at low energies. The decay rate of B → πτν and its theoretical uncertainty are evaluated using the B → π form factors given by recent lattice QCD studies. Comparing theoretical results with the current experimental data, B(B → πτν) < 2.5 × 10-4 and B(B → τντ) = (1.14±0.22) × 10-4, we obtain constraints on the Wilson coefficients that quantify potential new physics. We also present the expected sensitivity of the SuperKEKB/Belle II experiment. © The Author(s) 2017. Published by Oxford University Press on behalf of the Physical Society of Japan
URI
http://pr.ibs.re.kr/handle/8788114/3501
DOI
10.1093/ptep/ptw175
ISSN
2050-3911
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > Journal Papers (저널논문)
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