Production and decay of Xic0 at BABAR

TL;DR

This paper reports measurements of the production and decay properties of the Xic0 baryon using BABAR data, including branching ratios, momentum spectra, and cross sections, providing new insights into its behavior in B decays and continuum production.

Contribution

First measurement of the ratio of branching fractions for Xic0 decays and the cross-section product in e+e- collisions at BABAR.

Findings

Branching ratio B(Xic0 -> Omega- K+)/B(Xic0 -> Xi- pi+) = 0.294 +- 0.018 +- 0.016

Branching fraction product B(B -> Xic0 X) x B(Xic0 -> Xi- pi+) = (2.11 +- 0.19 +- 0.25) x 10^-4

Cross-section product sigma(e+ e- -> Xic0 X) x B(Xic0 -> Xi- pi+) = (388 +- 39 +- 41) fb

Abstract

Using 116.1 fb^-1 of data collected by the BABAR detector, we present an analysis of Xic0 production in B decays and from the ccbar continuum, with the Xic0 decaying into Omega- K+ and Xi- pi+ final states. We measure the ratio of branching fractions B(Xic0 -> Omega- K+)/B(Xic0 -> Xi- pi+) to be 0.294 +- 0.018 +- 0.016, where the first uncertainty is statistical and the second is systematic. The Xic0 momentum spectrum is measured on and 40 MeV below the Upsilon(4S) resonance. From these spectra the branching fraction product B(B -> Xic0 X) x B(Xic0 -> Xi- pi+) is measured to be (2.11 +- 0.19 +- 0.25) x 10^-4 and the cross-section product sigma(e+ e- -> Xic0 X) x B(Xic0 -> Xi- pi+) from the continuum is measured to be (388 +- 39 +- 41) fb at a center-of-mass energy of 10.58 GeV.