Published October 2016
| Version v1
Journal article
Remarks on the Pc structures and triangle singularities
- 1. Chinese Academy of Science, CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Beijing (China)
- 2. Forschungszentrum Juelich, Institute for Advanced Simulation, Institut fuer Kernphysik and Juelich Center for Hadron Physics, Juelich (Germany)
- 3. Universitaet Bonn, Helmholtz-Institut fuer Strahlen- und Kernphysik and Bethe Center for Theoretical Physics, Bonn (Germany)
- 4. Centro Mixto CSIC-Universidad de Valencia, Institutos de Investigacion de Paterna, Instituto de Fisica Corpuscular (IFIC), Valencia (Spain)
Description
It was proposed that the narrow Pc(4450) structure observed by the LHCb Collaboration in the reaction Λb → J/ψpK might be due to a triangle singularity around the χc1-proton threshold at 4.45 GeV. We discuss the occurrence of a similar triangle singularity in the J/ψp invariant mass distribution for the decay Λb → J/ψpπ, which could explain the bump around 4.45 GeV in the data. More precise measurements of this process would provide valuable information towards an understanding of the Pc structures. (orig.)
Availability note (English)
Available from: http://dx.doi.org/10.1140/epja/i2016-16318-4Additional details
Identifiers
Publishing Information
- Journal Title
- European Physical Journal. A
- Journal Volume
- 52
- Journal Issue
- 10
- Journal Page Range
- p. 1-6
- ISSN
- 1434-6001
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 48010130
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- EFFECTIVE MASS; EXOTIC RESONANCES; FEYNMAN DIAGRAM; LAMBDA B NEUTRAL BARYONS; MASS SPECTRA; PARTICLE STRUCTURE; SINGULARITY; WEAK HADRONIC DECAY
- Descriptors DEC
- BARYONS; BEAUTY BARYONS; BEAUTY PARTICLES; DECAY; DIAGRAMS; ELEMENTARY PARTICLES; FERMIONS; HADRONS; INFORMATION; MASS; PARTICLE DECAY; RESONANCE PARTICLES; SPECTRA; WEAK PARTICLE DECAY