A search is performed for the as yet unobserved baryonic Λ b 0  → Λη ′ and Λ b 0  → Λη decays with 3 fb−1 of proton-proton collision data recorded by the LHCb experiment. The B0 → K s 0 η ′ decay is used as a normalisation channel. No significant signal is observed for the Λ b 0  → Λη ′ decay. An upper limit is found on the branching fraction of B(Λ0b→Λη′) < 3.1 × 10−6 at 90% confidence level. Evidence is seen for the presence of the Λ b 0  → Λη decay at the level of 3σ significance, with a branching fraction B(Λ0b→Λη)=(9.3+7.3−5.3)×10−6 .

Search for the Λb0→Λη ′ and Λb0→ Λη decays with the LHCb detector / Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., 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., Anderson, J., Andreotti, M., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2015:9(2015). [10.1007/JHEP09(2015)006]

Search for the Λb0→Λη ′ and Λb0→ Λη decays with the LHCb detector

Capriotti, L.;Casse, G.;Sarti, A.;Sciubba, A.;
2015

Abstract

A search is performed for the as yet unobserved baryonic Λ b 0  → Λη ′ and Λ b 0  → Λη decays with 3 fb−1 of proton-proton collision data recorded by the LHCb experiment. The B0 → K s 0 η ′ decay is used as a normalisation channel. No significant signal is observed for the Λ b 0  → Λη ′ decay. An upper limit is found on the branching fraction of B(Λ0b→Λη′) < 3.1 × 10−6 at 90% confidence level. Evidence is seen for the presence of the Λ b 0  → Λη decay at the level of 3σ significance, with a branching fraction B(Λ0b→Λη)=(9.3+7.3−5.3)×10−6 .
2015
Hadron-Hadron Scattering B physics Flavor physics
01 Pubblicazione su rivista::01a Articolo in rivista
Search for the Λb0→Λη ′ and Λb0→ Λη decays with the LHCb detector / Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., 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., Anderson, J., Andreotti, M., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2015:9(2015). [10.1007/JHEP09(2015)006]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1074838
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