TY - JOUR
T1 - Observation and branching fraction measurement of the decay ?b- ? ?0 bp -
AU - Aaij, R.
AU - Abdelmotteleb, A. S. W.
AU - Abellan Beteta, C.
AU - Abudinen, F.
AU - Ackernley, T.
AU - Adeva, B.
AU - Adinolfi, M.
AU - Adlarson, P.
AU - Afsharnia, H.
AU - Agapopoulou, C.
AU - Aidala, C. A.
AU - Ajaltouni, Z.
AU - Akar, S.
AU - Akiba, K.
AU - Albicocco, P.
AU - Albrecht, J.
AU - Alessio, F.
AU - Alexander, M.
AU - Alfonso Albero, A.
AU - Aliouche, Z.
AU - Alvarez Cartelle, P.
AU - Amalric, R.
AU - Amato, S.
AU - Amey, J. L.
AU - Amhis, Y.
AU - An, L.
AU - Anderlini, L.
AU - Andersson, M.
AU - Andreianov, A.
AU - Andreola, P.
AU - Andreotti, M.
AU - Andreou, D.
AU - Ao, D.
AU - Archilli, F.
AU - Artamonov, A.
AU - Artuso, M.
AU - Aslanides, E.
AU - Atzeni, M.
AU - Audurier, B.
AU - Bacher, D.
AU - Bachiller Perea, I.
AU - Bachmann, S.
AU - Bachmayer, M.
AU - Back, J. J.
AU - Bailly-reyre, A.
AU - Baladron Rodriguez, P.
AU - Balagura, V.
AU - Baldini, W.
AU - Baptista de Souza Leite, J.
AU - Barbetti, M.
AU - LHCb collaboration
AU - da silva Bolognani, Carolina
AU - Cámpora Pérez, Daniel Hugo
AU - de Vries, Jacco
AU - Lucio Martinez, Miriam
AU - Merk, Marcel
AU - Nicotra, Davide
AU - Onderwater, Gerco
AU - Pawley, Chris
AU - Vos, Keri
PY - 2023/10/6
Y1 - 2023/10/6
N2 - The decay E-b -> A0bx-- is observed using a proton-proton collision data sample collected at center-of-ffiffimass energy p s 1/4 13 TeV with the LHCb detector, corresponding to an integrated luminosity of 5.5 fb-1. This process is mediated by the s -> uu over bar d quark-level transition, where the b quark in the E-b baryon is a spectator in the decay. Averaging the results obtained using the two A0b decay modes, A0b -> A thorn c x-- and A0b -> A thorn c x--x- thorn x--, the relative production ratio is measured to be ofE-b =fA0b thorn BoE-b -> A0bx-- thorn 1/4 o7.3 ? 0.8 ? 0.6 thorn x 10-4. Here the uncertainties are statistical and systematic, respectively, and fE-bofA0b thorn is the fragmentation fraction for a b quark into a E-b (A0b) baryon. Using an independent measurement of fE-b =fA0b, the branching fraction BoE-b -> A0bx-- thorn 1/4 o0.89 ? 0.10 ? 0.07 ? 0.29 thorn % is obtained, where the last uncertainty is due to the assumed SU(3) flavor symmetry in the determination of fE-b =fA0b.
AB - The decay E-b -> A0bx-- is observed using a proton-proton collision data sample collected at center-of-ffiffimass energy p s 1/4 13 TeV with the LHCb detector, corresponding to an integrated luminosity of 5.5 fb-1. This process is mediated by the s -> uu over bar d quark-level transition, where the b quark in the E-b baryon is a spectator in the decay. Averaging the results obtained using the two A0b decay modes, A0b -> A thorn c x-- and A0b -> A thorn c x--x- thorn x--, the relative production ratio is measured to be ofE-b =fA0b thorn BoE-b -> A0bx-- thorn 1/4 o7.3 ? 0.8 ? 0.6 thorn x 10-4. Here the uncertainties are statistical and systematic, respectively, and fE-bofA0b thorn is the fragmentation fraction for a b quark into a E-b (A0b) baryon. Using an independent measurement of fE-b =fA0b, the branching fraction BoE-b -> A0bx-- thorn 1/4 o0.89 ? 0.10 ? 0.07 ? 0.29 thorn % is obtained, where the last uncertainty is due to the assumed SU(3) flavor symmetry in the determination of fE-b =fA0b.
U2 - 10.1103/PhysRevD.108.072002
DO - 10.1103/PhysRevD.108.072002
M3 - Article
SN - 1550-7998
VL - 108
JO - Physical Review D
JF - Physical Review D
IS - 7
M1 - 072002
ER -