HADRON 2017

25-29 September 2017
Salamanca, Spain
Europe/Zurich timezone

Search for the $B$-meson decay to four baryons $B \to p \bar{p} p \bar{p}$ at BaBar

27 Sep 2017, 12:00
20m
Aula 2.3

Aula 2.3

Talk Hadron decays

Speaker

Laura Zani (INFN - National Institute for Nuclear Physics)

Description

The $B$ mesons are the lightest mesons which can decay to various final states containing different baryons. Up to now, the discrepancy between the inclusive branching fraction of all $B$ meson decay modes with at least a couple of baryons in the final state, measured by ARGUS to be $(6.8 +- 0.6)\%$ , and the sum of exclusive baryonic channels, averaged on neutral and positive $B$ mesons at less than 1\%, represents an open issue. The measurement and comparison of exclusive branching fractions of baryonic $B$ decays as well as studies on the dynamic of the decay, may allow better understanding of baryon production in $B$ decays and, more generally, hadron fragmentation into baryons. We present here a search for the decay of a $B$ meson in four baryons: $B \to p \bar{p} p \bar{p}$ , not yet observed.
The data set consists of about 470 million $B\bar{B}$ pairs collected with the BaBar
detector at the SLAC National Accelerator Laboratory.

Primary author

Laura Zani (INFN - National Institute for Nuclear Physics)