Search for Baryons with Two Charm Quarks
2002
Abstract
Using data from the SELEX experiment, we searched for baryons having two charm quarks. No one has yet observed a doubly-charmed baryon. We investigated the reconstruction $\Lambda^+_c K⁻ \pi^+\pi^+$, a decay mode consistent with a baryon having $ccu$ quarks. We observe an excess of 20 events above an expected background of 31 events, at a mass of 3.76 GeV/$c^2$. We observe differences between the signal events and the background. The mass resolution, mass, and decay mode are consistent with a $ccu$ baryon. The mass and production are higher than theoretical predictions for the ground state $\Xi^{++}_{cc}$. If the signal is real and not a doubly-charmed baryon, then it is not accounted for by current physics
Related Papers
- → Baryons with Double Charm(1989)102 cited
- → Electromagnetic structure of charmed baryons in Lattice QCD(2014)70 cited
- → The components and the magnetic moments of the charmed and the bottomed baryons(2007)6 cited
- → Charmed baryons and heavy quark spectroscopy result from FOCUS(2003)
- Charm Heavy Baryons Mass Spectrum(2010)