The Λb0→Λφ 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→sss 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 Λb0→Λφ decay. PHYSICS LETTERS. SECTION B, 759, 282-292 [10.1016/j.physletb.2016.05.077].

Observation of the Λb0→Λφ decay

BELLOLI, NICOLETTA;BORGHERESI, ALESSIO;CALVI, MARTA;CARNITI, PAOLO;CASSINA, LORENZO;FAZZINI, DAVIDE;GOTTI, CLAUDIO;GRILLO, LUCIA;Martinelli, M;MATTEUZZI, CLARA;Petruzzo, M;
2016

Abstract

The Λb0→Λφ 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→sss 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.
Articolo in rivista - Articolo scientifico
Nuclear and High Energy Physics
English
282
292
11
Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., et al. (2016). Observation of the Λb0→Λφ decay. PHYSICS LETTERS. SECTION B, 759, 282-292 [10.1016/j.physletb.2016.05.077].
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