Observation of pentaquark resonances in $\Lambda b \to J/\psi K^−p$ decays

LHCb has recently reported the observation of exotic structures in the J/psip channel, in Lambda_b -> J/psiK^-p decay, which we discuss here and refer to as charmoniumpentaquarkstates. The data sample corresponds to an integrated luminosity of 3.0 fb^-1acquired with the LHCb detector from 7 and 8...

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Detalles Bibliográficos
Autor principal: Adeva, B
Lenguaje:eng
Publicado: 2016
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1051/epjconf/201612602002
http://cds.cern.ch/record/2282504
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author Adeva, B
author_facet Adeva, B
author_sort Adeva, B
collection CERN
description LHCb has recently reported the observation of exotic structures in the J/psip channel, in Lambda_b -> J/psiK^-p decay, which we discuss here and refer to as charmoniumpentaquarkstates. The data sample corresponds to an integrated luminosity of 3.0 fb^-1acquired with the LHCb detector from 7 and 8 TeV pp collisions. An amplitude analysisof the three-body final state reproduces the two-body mass and angular distributions. Toobtain a satisfactory fit of the structures seen in the J/psip mass spectrum, it is necessaryto include two Breit-Wigner amplitudes that each describe a resonant state. Details aregiven on the significance, and prefered quantum numbers, of these two resonances.
id oai-inspirehep.net-1496435
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2016
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spelling oai-inspirehep.net-14964352019-09-30T06:29:59Zdoi:10.1051/epjconf/201612602002http://cds.cern.ch/record/2282504engAdeva, BObservation of pentaquark resonances in $\Lambda b \to J/\psi K^−p$ decaysParticle Physics - ExperimentLHCb has recently reported the observation of exotic structures in the J/psip channel, in Lambda_b -> J/psiK^-p decay, which we discuss here and refer to as charmoniumpentaquarkstates. The data sample corresponds to an integrated luminosity of 3.0 fb^-1acquired with the LHCb detector from 7 and 8 TeV pp collisions. An amplitude analysisof the three-body final state reproduces the two-body mass and angular distributions. Toobtain a satisfactory fit of the structures seen in the J/psip mass spectrum, it is necessaryto include two Breit-Wigner amplitudes that each describe a resonant state. Details aregiven on the significance, and prefered quantum numbers, of these two resonances.LHCb has recently reported the observation of exotic structures in the J/ψp channel, in Λb → J/ψK−p decay, which we discuss here and refer to as charmoniumpentaquarkstates. The data sample corresponds to an integrated luminosity of 3.0 fb−1acquired with the LHCb detector from 7 and 8 TeV pp collisions. An amplitude analysisof the three-body final state reproduces the two-body mass and angular distributions. Toobtain a satisfactory fit of the structures seen in the J/ψp mass spectrum, it is necessaryto include two Breit-Wigner amplitudes that each describe a resonant state. Details aregiven on the significance, and prefered quantum numbers, of these two resonances.oai:inspirehep.net:14964352016
spellingShingle Particle Physics - Experiment
Adeva, B
Observation of pentaquark resonances in $\Lambda b \to J/\psi K^−p$ decays
title Observation of pentaquark resonances in $\Lambda b \to J/\psi K^−p$ decays
title_full Observation of pentaquark resonances in $\Lambda b \to J/\psi K^−p$ decays
title_fullStr Observation of pentaquark resonances in $\Lambda b \to J/\psi K^−p$ decays
title_full_unstemmed Observation of pentaquark resonances in $\Lambda b \to J/\psi K^−p$ decays
title_short Observation of pentaquark resonances in $\Lambda b \to J/\psi K^−p$ decays
title_sort observation of pentaquark resonances in $\lambda b \to j/\psi k^−p$ decays
topic Particle Physics - Experiment
url https://dx.doi.org/10.1051/epjconf/201612602002
http://cds.cern.ch/record/2282504
work_keys_str_mv AT adevab observationofpentaquarkresonancesinlambdabtojpsikpdecays

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