Decays of the Ξb- and Ωb- baryons to the charmless final states ph-h′-, where h(′) denotes a kaon or pion, are searched for with the LHCb detector. The analysis is based on a sample of proton-proton collision data collected at center-of-mass energies s=7 and 8 TeV, corresponding to an integrated luminosity of 3 fb-1. The decay Ξb-→pK-K- is observed with a significance of 8.7 standard deviations, and evidence at the level of 3.4 standard deviations is found for the Ξb-→pK-π- decay. Results are reported, relative to the B-→K+K-K- normalization channel, for the products of branching fractions and b-hadron production fractions. The branching fractions of Ξb-→pK-π- and Ξb-→pπ-π- relative to Ξb-→pK-K- decays are also measured.

Observation of the Decay Ξb- →pK-K- / Aaij, R., 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., Andrews, J.E., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 118:7(2017), pp. N/A-N/A. [10.1103/PhysRevLett.118.071801]

Observation of the Decay Ξb- →pK-K-

Bizzeti A.;
2017

Abstract

Decays of the Ξb- and Ωb- baryons to the charmless final states ph-h′-, where h(′) denotes a kaon or pion, are searched for with the LHCb detector. The analysis is based on a sample of proton-proton collision data collected at center-of-mass energies s=7 and 8 TeV, corresponding to an integrated luminosity of 3 fb-1. The decay Ξb-→pK-K- is observed with a significance of 8.7 standard deviations, and evidence at the level of 3.4 standard deviations is found for the Ξb-→pK-π- decay. Results are reported, relative to the B-→K+K-K- normalization channel, for the products of branching fractions and b-hadron production fractions. The branching fractions of Ξb-→pK-π- and Ξb-→pπ-π- relative to Ξb-→pK-K- decays are also measured.
2017
118
7
N/A
N/A
Observation of the Decay Ξb- →pK-K- / Aaij, R., 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., Andrews, J.E., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 118:7(2017), pp. N/A-N/A. [10.1103/PhysRevLett.118.071801]
Aaij, R.; Adeva, B.; Adinolfi, M.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Alkhazov, G.; Alvarez Cartelle, P.; Alv...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1209733
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