The Λ0b → Λ ϕ decay is observed using data corresponding to an integrated luminosity of 3.0 fb^−1 recorded by the LHCb experiment. The decay proceeds at leading order via a b → s anti-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 ± 1.04 ± 0.35{−0.62}{+0.67}) × 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.

Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., et al. (2016). Observation of the Λ0b → Λ ϕ Decay. PHYSICS LETTERS. SECTION B, 759, 282-292 [10.1016/j.physletb.2016.05.077].

Observation of the Λ0b → Λ ϕ Decay

BETTI, FEDERICO;Capriotti, L.;CARBONE, ANGELO;FERRARI, FABIO;GALLI, DOMENICO;MUSSINI, MANUEL;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;ZUCCHELLI, STEFANO
2016

Abstract

The Λ0b → Λ ϕ decay is observed using data corresponding to an integrated luminosity of 3.0 fb^−1 recorded by the LHCb experiment. The decay proceeds at leading order via a b → s anti-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 ± 1.04 ± 0.35{−0.62}{+0.67}) × 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.
2016
Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., et al. (2016). Observation of the Λ0b → Λ ϕ Decay. PHYSICS LETTERS. SECTION B, 759, 282-292 [10.1016/j.physletb.2016.05.077].
Aaij, R.; Abellán Beteta, C.; Adeva, B.; Adinolfi, M.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Alkhazov, G.; Alvar...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/542047
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