TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Garcia Martin, L. M.
AU  - Henry, L.
AU  - Jashal, B. K.
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Remon Alepuz, C.
AU  - Ruiz Vidal, J.
AU  - Sanchez Mayordomo, C.
PY  - 2020
DA  - 2020//
TI  - First branching fraction measurement of the suppressed decay Xi(0)(c) -> pi(-) Lambda(+)(c)
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 071101
EP  - 11pp
VL  - 102
IS  - 7
PB  - Amer Physical Soc
AB  - The Xi(0)(c) baryon is unstable and usually decays into charmless final states by the c -> sud transition. It can, however, also disintegrate into a pi(-) meson and a Lambda(+)(c) baryon via s quark decay or via cs -> dc weak scattering. The interplay between the latter two processes governs the size of the branching fraction B(Xi(0)(c) -> pi(-) Lambda(+)(c)), first measured here to be (0.55 +/- 0.02 +/- 0.18)%, where the first uncertainty is statistical and second systematic. This result is compatible with the larger of the theoretical predictions that connect models of hyperon decays using partially conserved axial currents and SU(3) symmetry with those involving the heavy-quark expansion and heavy-quark symmetry. In addition, the branching fraction of the normalization channel, B(Xi(+)(c) -> pK(-) pi(+)) = (1.135 +/- 0.002 +/- 0.387)% is measured.
SN  - 1550-7998
UR  - https://arxiv.org/abs/2007.12096
UR  - https://doi.org/10.1103/PhysRevD.102.071101
DO  - 10.1103/PhysRevD.102.071101
LA  - English
N1  - WOS:000576891900001
ID  - LHCbCollaborationAaij_etal2020
ER  -