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Title: First branching fraction measurement of the suppressed decay Xi(0)(c) -> pi(-) Lambda(+)(c)
Author: Alfonso Albero, Alejandro
Camboni, Alessandro
García Moreno, P.
Garrido Beltrán, Lluís
Gascón Fora, David
Gironella Gironell, Pere
Gómez Fernández, S.
Graciani Díaz, Ricardo
Graugés Pous, Eugeni
Manera Escalero, R.
Mauricio, J.
Calvo Gómez, Míriam
Golobardes, Elisabet
Vilasis-Cardona, Xavier
LHCb Collaboration
Keywords: Gran Col·lisionador d'Hadrons
Mesons (Física nuclear)
Large Hadron Collider (France and Switzerland)
Mesons (Nuclear physics)
Issue Date: 12-Oct-2020
Publisher: American Physical Society
Abstract: The Ξ0c baryon is unstable and usually decays into charmless final states by the c→su¯d transition. It can, however, also disintegrate into a π− meson and a Λ+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(Ξ0c→π−Λ+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(Ξ+c→pK−π+)=(1.135±0.002±0.387)% is measured.
Note: Reproducció del document publicat a:
It is part of: Physical Review D, 2020, vol. 102 , num. 7, p. 071101
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ISSN: 1550-7998
Appears in Collections:Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))
Articles publicats en revistes (Física Quàntica i Astrofísica)

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