Study of τ → hhh+ντ decays

Belle Collaboration

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование


We present a new study of the τ→hhh+ντ decays at Belle. Previous measurements of the branching fractions of these decays at Belle and BABAR showed significant difference, especially for the τ→KK+Kντ mode. The dominant systematic uncertainty is related to the K/π identification (PID). There are two sources of the PID uncertainty: insufficient accuracy of the experimental misidentification efficiency correction for the low momentum pions from τ decays and impact of the additional γ-s on the identification. To improve the accuracy of the misidentification efficiency correction we utilize KS 0(→π+π) sample. Additional γ-s in the vicinity of the track give notable impact on the PID, hence we apply special γ-veto. The systematic uncertainties are monitored by specially constructed estimator.

Язык оригиналаанглийский
Страницы (с-по)221-223
Число страниц3
ЖурналNuclear and Particle Physics Proceedings
СостояниеОпубликовано - 1 июн. 2017


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