Observation of the Λ0b→Λφdecay

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2016_physicslettersb_lhcbcollab_observation.pdf (1.01 MB)
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URI: http://hdl.handle.net/10347/22432
ISSN: 0370-2693
E-ISSN: 1873-2445
DOI: 10.1016/j.physletb.2016.05.077

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2016

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Elsevier
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The Λ0b→Λφdecay is observed using data corresponding to an integrated luminosity of 3.0fb−1recorded by the LHCbexperiment. The decay proceeds at leading order via a b →sssloop transition and is therefore sensitive to the possible presence of particles beyond the Standard Model. A first observation is reported with a significance of 5.9standard deviations. The value of the branching fraction is measured to be (5.18 ±1.04 ±0.35+0.67−0.62) ×10−6, where the first uncertainty is statistical, the second is systematic, and the third is related to external inputs. Triple-product asymmetries are measured to be consistent with zero.

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Cheung, S. F., Evans, T., Gandini, P., Gruberg Cazon, B. R., Hadavizadeh, T., Harnew, N., ... & Malde, S. S. (2016). Observation of the Λ0b→ Λφ decay. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 759, 282-292

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©2016 The Author. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.

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