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Search for lepton-number- and baryon-number-violating tau decays at Belle

Title
Search for lepton-number- and baryon-number-violating tau decays at Belle
Author
천병구
Issue Date
2020-12
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW D, v. 102, no. 11, article no. 111101
Abstract
We search for lepton-number- and baryon-number-violating decays tau(-) -˃ (p) over bare(+)e(-), (p) over bare(-)e(-), (p) over bare(+)mu(-), (p) over bare(-)mu(+), (p) over bar mu(+)mu(-), and (p) over bar mu(-)mu(-) using 921 fb(-1) of data, equivalent to (841 +/- 12) x 10(6) tau(+)tau(-) events, recorded with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. In the absence of a signal, 90% confidence-level upper limits are set on the branching fractions of these decays in the range (1.8 - 4.0) x 10(-8). We set the world's first limits on the first four channels and improve the existing limits by an order of magnitude for the last two channels.
URI
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.102.111101https://repository.hanyang.ac.kr/handle/20.500.11754/174970
ISSN
2470-0010; 2470-0029
DOI
10.1103/PhysRevD.102.111101
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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