Measurement of the Ξ−b and Ω−b baryon lifetimes

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2014__physicslettersb_lhcbcollab_measurement.pdf (566.83 KB)
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URI: http://hdl.handle.net/10347/22143
ISSN: 0370-2693
E-ISSN: 1873-2445
DOI: 10.1016/j.physletb.2014.06.064

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2014

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Elsevier
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Using a data sample of ppcollisions corresponding to an integrated luminosity of 3fb−1, the Ξ−band Ω−bbaryons are reconstructed in the Ξ−b→J/ψΞ−and Ω−b→J/ψΩ−decay modes and their lifetimes measured to be τ Ξ − b = 1.55+0.10 −0.09 (stat)±0.03 (syst) ps, τ Ω − b = 1.54+0.26 −0.21 (stat)± 0.05 (syst) ps. These are the most precise determinations to date. Both measurements are in good agreement with previous experimental results and with theoretical predictions

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Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Albrecht, J., ... & Cartelle, P. A. (2014). Measurement of the Ξ−b and Ω−b baryon lifetimes. Physics Letters B, 736, 154-162

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©2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/3.0/). Funded by SCOAP3.

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Física de Partículas
Instituto Galego de Física de Altas Enerxías (IGFAE)