- Main
Study of the production of A0band B0 hadrons in pp collisions and first measurement of the ∧ob→J/ΨpK branching fraction
- 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;
- Campana, P;
- Campora Perez, D;
- Capriotti, L;
- Carbone, A;
- Carboni, G;
- Cardinale, R;
- Cardini, A;
- Carniti, P;
- Carson, L
- et al.
Published Web Location
https://doi.org/10.1088/1674-1137/40/1/011001Abstract
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.
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