EPJ Web Conf.
Volume 129, 2016QCD@Work 2016 - International Workshop on Quantum Chromodynamics - Theory and Experiment
|Number of page(s)||6|
|Published online||25 November 2016|
Exotic baryons as a hadronic molecule in the heavy quark region
Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Genova, via Dodecaneso 33, 16146 Genova, Italy
* e-mail: firstname.lastname@example.org
Published online: 25 November 2016
We study the hadronic molecules formed by the coupled-channel system of D̄(*)Λc and D̄(*)Σc(*), inspired by the two hidden-charm pentaquark states observed by LHCb collaborations in 2015. In these molecules, the coupled channels of D̄(*)Σc(*) are important because the thresholds of these channels are approximately degenerated by the heavy quark spin symmetry. In addition, we consider the coupling to the D̄(*)Λc channel whose thresholds are close to the D̄(*)Σc(*) thresholds, and the coupling to the state with ℓ ≠ 0 mixed by the tensor force. By solving the coupled-channel Schrödinger equations with the one meson exchange potentials, we study the hidden-charm hadronic molecules with I(JP) = 1/2(3/2±) and 1/2(5/2±). We conclude that the JP assignment of the observed pentaquarks is 3/2+ for P+c (4380) and 5/2− for P+c (4450), which is agreement with the results of the LHCb analysis. In addition, we give predictions for other JP = 3/2± states.
© The Authors, published by EDP Sciences, 2016
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.