Joint annual meeting of Swiss and Austrian Physical Societies 2017

【362】 Lambda_c to Sigma pi pi decays at Belle

24 Aug 2017, 14:15

15m

Talk Nuclear, Particle- and Astrophysics (TASK - FAKT) Nuclear, Particle-and Astrophysics (TASK-FAKT)

Speaker

Manfred Berger (Austrian Academy of Sciences)

Description

We report new measurements of the branching fractions of the decays $\Lambda^+_c \rightarrow \Sigma^+ \pi^- \pi^+$, $\Sigma^0 \pi^0 \pi^+$ and $\Sigma^+ \pi^0 \pi^0$ based on 711/fb of integrated luminosity recorded with the Belle detector at the KEKB asymmetric energy $e^+e^-$ collider near the $\Upsilon$(4S) resonance (charge conjugated decays are implicitly included). All results are obtained relative to the normalisation mode $\Lambda_c \rightarrow p^+ K^- pi^+$. This is the first measurement of the $\Lambda^+_c \rightarrow \Sigma^+ \pi^0 \pi^0$ channel. The measurements of the other modes are significantly more precise compared to previous analyses.