Study of charmonium production in b -hadron decays and first evidence for the decay B s 0 → ϕ ϕ ϕ

• Published in: The European physical journal. C, Particles and fields Vol. 77; no. 9; pp. 609 - 18
• Main Authors: Aaij, R, Adeva, B, Adinolfi, M, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M, Ali, S, Alkhazov, G, Alvarez Cartelle, P, Alves, Jr, A A, Amato, S, Amerio, S, Amhis, Y, An, L, Anderlini, L, Andreassi, G, Andreotti, M, Andrews, J E, Appleby, R B, Archilli, F, d'Argent, P, Arnau Romeu, J, Artamonov, A, Artuso, M, Aslanides, E, Auriemma, G, Baalouch, M, Babuschkin, I, Bachmann, S, Back, J J, Badalov, A, Baesso, C, Baker, S, Balagura, V, Baldini, W, Baranov, A, Barlow, R J, Barschel, C, Barsuk, S, Barter, W, Baryshnikov, F, Baszczyk, M, Batozskaya, V, Battista, V, Bay, A, Beaucourt, L, Beddow, J, Bedeschi, F, Bediaga, I, Beiter, A, Bel, L J, Bellee, V, Belloli, N, Belous, K, Belyaev, I, Ben-Haim, E, Bencivenni, G, Benson, S, Beranek, S, Berezhnoy, A, Bernet, R, Bertolin, A, Betancourt, C, Betti, F, Bettler, M-O, van Beuzekom, M, Bezshyiko, Ia, Bifani, S, Billoir, P, 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, T J V, Bowen, E, Bozzi, C, Braun, S, Britton, T, Brodzicka, J, Buchanan, E, Burr, C, Bursche, A, Buytaert, J
• Format: Journal Article
• Language: English
• Published: France Springer Nature B.V 2017
• Subjects: Collision dynamics; Confidence intervals; Decay; Large Hadron Collider; Luminosity; Mesons; Statistical analysis; Transverse momentum; Uncertainty
• ISSN: 1434-6044; 1434-6052
• DOI: 10.1140/epjc/s10052-017-5151-8

Using decays to
-meson pairs, the inclusive production of charmonium states in
-hadron decays is studied with
collision data corresponding to an integrated luminosity of
, collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. Denoting by
the inclusive branching fraction of a
hadron to a charmonium state
that decays into a pair of
mesons, ratios
are determined as
,
,
,
,
and
. Here and below the first uncertainties are statistical and the second systematic. Upper limits at 90% confidence level for the inclusive production of
(3872),
(3915) and
states are obtained as
,
and
. Differential cross-sections as a function of transverse momentum are measured for the
and
states. The branching fraction of the decay
is measured for the first time,
. Here the third uncertainty is due to the branching fraction of the decay
, which is used for normalization. No evidence for intermediate resonances is seen. A preferentially transverse
polarization is observed. The measurements allow the determination of the ratio of the branching fractions for the
decays to
and
as
.