# Observation of the $\Lambda_b^0\to\Lambda\phi$ decay

Abstract : The $\Lambda_b^0\to\Lambda\phi$ decay is observed using data corresponding to an integrated luminosity of 3.0fb$^{-1}$ recorded by the LHCb experiment. The decay proceeds at leading order via a $b\to s\bar{s}s$ loop transition and is therefore sensitive to the possible presence of particles beyond the Standard Model. A first observation is reported with a significance of $5.9$ standard deviations. The value of the branching fraction is measured to be $(5.18\pm1.04\pm0.35\,^{+0.67}_{-0.62})\times10^{-6}$, 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.
Type de document :
Article dans une revue
Physics Letters B, Elsevier, 2016, 759, pp. 282-292. 〈10.1016/j.physletb.2016.05.077〉

http://hal.in2p3.fr/in2p3-01285948
Contributeur : Danielle Cristofol <>
Soumis le : jeudi 10 mars 2016 - 09:49:35
Dernière modification le : dimanche 22 avril 2018 - 01:20:03

### Citation

R. Aaij, C. Abellán Beteta, B. Adeva, M. Adinolfi, Z. Ajaltouni, et al.. Observation of the $\Lambda_b^0\to\Lambda\phi$ decay. Physics Letters B, Elsevier, 2016, 759, pp. 282-292. 〈10.1016/j.physletb.2016.05.077〉. 〈in2p3-01285948〉

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