Study of the production of A0band B0hadrons in pp collisions and first measurement of the ∧ob→J/ΨpK branching fraction
- Author(s): 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, AA
- Amato, S
- Amerio, S
- Amhis, Y
- An, L
- Anderlini, L
- Anderson, J
- 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
- 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
- Bettler, MO
- Van Beuzekom, M
- Bien, A
- 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
- Borghi, S
- Borsato, M
- Bowcock, TJV
- Bowen, E
- Bozzi, C
- Braun, S
- Britsch, M
- Britton, T
- Brodzicka, J
- Brook, NH
- Buchanan, E
- Bursche, A
- Buytaert, J
- Cadeddu, S
- Calabrese, R
- Calvi, M
- Calvo Gomez, M
- et al.
Published Web Location
https://doi.org/10.1088/1674-1137/40/1/011001Abstract
© 2015 Article funded by SCOAP3 and published under licence by Chinese Physical Society. The product of the Λ0b(B0) differential production cross-section and the branching fraction of the decay Λ0bJ= pK.. (B0!J= K Λ (892)0) is measured as a function of the beauty hadron transverse momentum, pT, and rapidity, y. The kinematic region of the measurements is pT >20 GeV=c and 2:0>y>4:5. The measurements use a data sample corresponding to an integrated luminosity of 3fb..1 collected by the LHCb detector in pp collisions at centre-of-mass energies ps = 7 TeV in 2011 and ps = 8 TeV in 2012. Based on previous LHCb results of the fragmentation fraction ratio, fΛ0 b =fd, the branching fraction of the decay Λ0 b!J= pK.. is measured to be B(Λ0 bJ= pK..)=(3:17±0:04±0:07±0:34+0:45 ..0:28 )10..4 ; where the first uncertainty is statistical, the second is systematic, the third is due to the uncertainty on the branching fraction of the decay B0J= K Λ (892)0, and the fourth is due to the knowledge of fΛ0 b =fd. The sum of the asymmetries in the production and decay between Λ0 b and Λ 0 b is also measured as a function of pT and y. The previously published branching fraction of Λ0 b ! J= p.., relative to that of Λ0 b ! J= pK.., is updated. The branching fractions of Λ0 b!P+ c (!J= p)K.. are determined.