Precision measurement of the Λ+c, Ξ+c, and Ξ0c baryon lifetimes
| Parent link: | Physical Review D: particles, fields, gravitation, and cosmology Vol. 100, iss. 3.— 2019.— [032001, 12 p.] |
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| Corporate Authors: | , |
| Drugi avtorji: | , , , , , , |
| Izvleček: | Title screen We report measurements of the lifetimes of the Λ+c, Ξ+c and Ξ0c charm baryons using proton-proton collision data at center-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3.0 fb−1, collected by the LHCb experiment. The charm baryons are reconstructed through the decays Λ+c→pK−π+, Ξ+c→pK−π+ and Ξ0c→pK−K−π+, and originate from semimuonic decays of beauty baryons. The lifetimes are measured relative to that of the D+ meson, and are determined to be τΛ+c=203.5±1.0±1.3±1.4 fs, τΞ+c=456.8±3.5±2.9±3.1 fs, τΞ0c=154.5±1.7±1.6±1.0 fs, where the uncertainties are statistical, systematic, and due to the uncertainty in the D+ lifetime. The measurements are approximately 3-4 times more precise than the current world average values. The Λ+c and Ξ+c lifetimes are in agreement with previous measurements; however, the Ξ0c baryon lifetime is approximately 3.3 standard deviations larger than the world average value. |
| Jezik: | angleščina |
| Izdano: |
2019
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| Teme: | |
| Online dostop: | https://doi.org/10.1103/PhysRevD.100.032001 |
| Format: | Elektronski Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=663433 |