Observation of the Λ0b → Λφ decay

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Title: Observation of the Λ0b → Λφ decay
Authors: 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, AA
Amato, S
Amerio, S
Amhis, Y
An, L
Anderlini, L
Andreassi, G
Andreotti, M
Andrews, JE
Appleby, RB
Aquines Gutierrez, O
Archilli, F
D'Argent, P
Artamonov, A
Artuso, M
Aslanides, E
Auriemma, G
Baalouch, M
Bachmann, S
Back, JJ
Badalov, A
Baesso, C
Baker, S
Baldini, W
Barlow, RJ
Barschel, C
Barsuk, S
Barter, W
Batozskaya, V
Battista, V
Bay, A
Beaucourt, L
Beddow, J
Bedeschi, F
Bediaga, I
Bel, LJ
Bellee, V
Belloli, N
Belyaev, I
Ben-Haim, E
Bencivenni, G
Benson, S
Benton, J
Berezhnoy, A
Bernet, R
Bertolin, A
Betti, F
Bettler, MO
Van Beuzekom, M
Bifani, S
Billoir, P
Bird, T
Birnkraut, A
Bizzeti, A
Blake, T
Blanc, F
Blouw, J
Blusk, S
Bocci, V
Bondar, A
Bondar, N
Bonivento, W
Borgheresi, A
Borghi, S
Borisyak, M
Borsato, M
Boubdir, M
Bowcock, TJV
Bowen, E
Bozzi, C
Braun, S
Britsch, M
Britton, T
Brodzicka, J
Buchanan, E
Burr, C
Bursche, A
Buytaert, J
Cadeddu, S
Item Type: Journal Article
Abstract: © 2016 The Author.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.
Issue Date: 26-May-2016
Date of Acceptance: 24-May-2016
ISSN: 0370-2693
Publisher: Elsevier
Start Page: 282
End Page: 292
Journal / Book Title: Physics Letters B
Volume: 759
Copyright Statement: © 2016 The Author. Published by Elsevier B.V. This is an open access article under the CC BY license (
Keywords: hep-ex
Nuclear & Particles Physics
0202 Atomic, Molecular, Nuclear, Particle And Plasma Physics
Publication Status: Published
Appears in Collections:Physics
High Energy Physics
Faculty of Natural Sciences

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