CERN Accelerating science

ATLAS Note
Report number ATLAS-CONF-2019-048
Title Study of $J/\psi p$ resonances in the $Λ^0_b→J/\psi pK^−$ decays in $pp$ collisions at $\sqrt{s}$=7 and 8TeV with the ATLAS detector
Corporate Author(s) The ATLAS collaboration
Collaboration ATLAS Collaboration
Imprint 17 Oct 2019. - 24 p.
In: 18th International Conference on B-Physics at Frontier Machines, Ljubljana, Slovenia, 30 Sep - 4 Oct 2019
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; ATLAS
Free keywords BPHYS
Abstract A study of $J/\psi p$ resonances in the $Λ^0_b→J/\psi pK^−$ decays with large $m(pK^-)$ invariant masses by the ATLAS experiment at the LHC is presented. The analysis is based on a combined sample of $pp$ collision data at centre-of-mass energies $\sqrt{s}$=7TeV and 8TeV corresponding to integrated luminosities of $4.9fb^{−1}$ and $20.6fb^{−1}$, respectively. Although the data prefer the model with two or more pentaquark states, the model without pentaquarks is not excluded. The pentaquark masses and widths obtained using the model with two pentaquarks are consistent with those from the LHCb experiment.

Corresponding record in: Inspire


 Записът е създаден на 2019-10-17, последна промяна на 2019-10-17


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