First Observation of a Family of Double-Charm Baryons
SELEX Collaboration, J.S. Russ (Carnegie Mellon University) et al
TL;DR
This paper reports the first experimental observation of a family of doubly-charmed baryons, providing mass measurements and initial lifetime estimates, challenging existing theoretical expectations.
Contribution
It presents the first observation and characterization of doubly-charmed baryons Xi_cc+ and Xi_cc++, including mass measurements and decay modes.
Findings
Candidates for doubly-charmed baryons observed
Masses consistent with theoretical predictions
Lifetime estimates suggest similar lifetimes for Xi_cc+ and Xi_cc++
Abstract
The SELEX experiment (E781) at Fermilab has candidates for high mass states decaying to Lambda_c+ K- pi+ and Lambda_c+ K- pi+ pi+, Cabibbo-allowed decay modes of doubly-charmed baryons Xi_cc+ and Xi_cc++. The masses are consistent with theoretical considerations, but the spectroscopy is surprising. Limited lifetime information suggests that tau_{Xi_cc++} \sim tau_{Xi_cc+}.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsQuantum Chromodynamics and Particle Interactions · Superconducting Materials and Applications · Particle physics theoretical and experimental studies