Observation of the decay Λ<inf>b</inf><sup>0</sup>→Λ<inf>c</inf><sup>+</sup>pp‾π<sup>−</sup>
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Author(s)
Type
Journal Article
Abstract
The decay Λb0→Λc+pp‾π−is observed using pp collision data collected with the LHCb detector at centre-of-mass energies of s=7 and 8 Tev, corresponding to an integrated luminosity of 3 fb−1. The ratio of branching fractions between Λb0→Λc+pp‾π−and Λb0→Λc+π−decays is measured to be [Formula presented]=0.0540±0.0023±0.0032. Two resonant structures are observed in the Λc+π−mass spectrum of the Λb0→Λc+pp‾π−decays, corresponding to the Σc(2455)0and Σc⁎(2520)0states. The ratios of branching fractions with respect to the decay Λb0→Λc+pp‾π−are [Formula presented]=0.089±0.015±0.006,[Formula presented]=0.119±0.020±0.014. In all of the above results, the first uncertainty is statistical and the second is systematic. The phase space is also examined for the presence of dibaryon resonances. No evidence for such resonances is found.
Date Issued
2018-09-10
Date Acceptance
2018-07-17
ISSN
0370-2693
Publisher
Elsevier
Start Page
101
End Page
111
Journal / Book Title
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume
784
Copyright Statement
©
2018
The
Author(s). Published
by
Elsevier
B.V.
This
is
an
open
access
article
under
the
CC
BY
license
(http://creati
vecommons.org/licenses/by/4.0/).
2018
The
Author(s). Published
by
Elsevier
B.V.
This
is
an
open
access
article
under
the
CC
BY
license
(http://creati
vecommons.org/licenses/by/4.0/).
Subjects
hep-ex
0202 Atomic, Molecular, Nuclear, Particle And Plasma Physics
Nuclear & Particles Physics
Publication Status
Published
OA Location
http://doi.org/10.1016/j.physletb.2018.07.033
Date Publish Online
2018-07-25