Report number
| LHCb-PROC-2022-001 ; CERN-LHCb-PROC-2022-001 |
Title
| Charm baryons at LHCb |
Author(s)
| Seman Bobulska, Dana (University of Glasgow (GB)) |
Collaboration
| LHCb Collaboration |
To be published in:
| PoS CHARM2020 (2021) 030 |
Submitted to
| 10th International Workshop on Charm Physics (CHARM 2020), Online, Mexico, 31 May - 4 June 2021, pp.030 |
DOI
| 10.22323/1.385.0030 |
Submitted by
| lhcb.secretariat@cern.ch on 06 Jan 2022 |
Subject category
| Particle Physics - Experiment |
Accelerator/Facility, Experiment
| CERN LHC ; LHCb |
Abstract
| The LHCb experiment collected the world's largest sample of charmed hadrons during LHC Run 1 and Run 2. With this data set, LHCb is currently providing the world's most precise measurements of properties and production of known charmed baryons, as well as searching for many previously unobserved states. The latest results on the charmed baryons described in this document include the lifetime measurement of the Ω0c and Ξ0c baryons that are produced directly from proton-proton collisions and reconstructed in the pK−K−π+ final state. The Ω0c lifetime is measured to be 276.5±13.4(stat)±4.4(syst)±0.7(D0)fs and the Ξ0c lifetime to be 148.0±2.3(stat)±2.2(syst)±0.2(D0)fs. Both results are consistent with the previous LHCb measurement based on semileptonic decays of b-hadrons. The latest results on the charm baryons from the LHCb collaboration also include searches for the Ξ+cc baryon in the Ξ+cc→Ξ+cπ−π+ decay, the first search for the Ω+cc baryon in the Ω+cc→Ξ+cK−π+ decay, and the searches for the Ξ0bc and Ω0bc baryons in the Λ+cπ− and Ξ+cπ− final states. No significant signals are found for neither of these decays, therefore upper limits are set on the ratio of production cross-sections times the ratio of branching fractions with respect to their normalisation decay. |
Copyright/License
| publication: © 2021-2025 The author(s) (License: CC-BY-NC-ND-4.0) |
Related document
| Slides LHCb-TALK-2021-110 |