Observation of the Decay Ξb- →pK-K-
- Author(s): Aaij, R
- Adeva, B
- Adinolfi, M
- Ajaltouni, Z
- Akar, S
- Albrecht, J
- Alessio, F
- Alexander, M
- Ali, S
- Alkhazov, G
- Alvarez Cartelle, P
- Alves, AA
- Amato, S
- Amerio, S
- Amhis, Y
- An, L
- Anderlini, L
- Andreassi, G
- Andreotti, M
- Andrews, JE
- Appleby, RB
- Archilli, F
- D'Argent, P
- Arnau Romeu, J
- Artamonov, A
- Artuso, M
- Aslanides, E
- Auriemma, G
- Baalouch, M
- Babuschkin, I
- Bachmann, S
- Back, JJ
- Badalov, A
- Baesso, C
- Baker, S
- Balagura, V
- Baldini, W
- Barlow, RJ
- Barschel, C
- Barsuk, S
- Barter, W
- Baszczyk, M
- Batozskaya, V
- Batsukh, B
- Battista, V
- Bay, A
- Beaucourt, L
- Beddow, J
- Bedeschi, F
- Bediaga, I
- Bel, LJ
- Bellee, V
- Belloli, N
- Belous, K
- Belyaev, I
- Ben-Haim, E
- Bencivenni, G
- Benson, S
- Berezhnoy, A
- Bernet, R
- Bertolin, A
- Betancourt, C
- Betti, F
- Bettler, MO
- Van Beuzekom, M
- Bezshyiko, I
- Bifani, S
- Billoir, P
- Bird, T
- Birnkraut, A
- Bitadze, A
- Bizzeti, A
- Blake, T
- Blanc, F
- Blouw, J
- Blusk, S
- Bocci, V
- Boettcher, T
- Bondar, A
- Bondar, N
- Bonivento, W
- Bordyuzhin, I
- Borgheresi, A
- Borghi, S
- Borisyak, M
- Borsato, M
- Bossu, F
- Boubdir, M
- Bowcock, TJV
- Bowen, E
- Bozzi, C
- Braun, S
- et al.
Published Web Location
https://doi.org/10.1103/PhysRevLett.118.071801Abstract
© 2017 CERN. 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.
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