The Λ0 b → 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 +0.67−0.62) × 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.

Observation of the Λ<inf>b</inf>0→Λφ decay / Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 759:(2016), pp. 282-292. [10.1016/j.physletb.2016.05.077]

Observation of the Λb0→Λφ decay

Capriotti, L.;Casse, G.;Sarti, A.;Sciubba, A.;
2016

Abstract

The Λ0 b → 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 +0.67−0.62) × 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.
2016
B physics Branching fraction Flavor physics Hadron-Hadron scattering (experiments)
01 Pubblicazione su rivista::01a Articolo in rivista
Observation of the Λ<inf>b</inf>0→Λφ decay / Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 759:(2016), pp. 282-292. [10.1016/j.physletb.2016.05.077]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1074217
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