Modeling charmonium-η decays of JPC=1-- higher charmonia

Modeling charmonium-η decays of JPC=1-- higher charmonia We propose a new model to create a light meson in the heavy quarkonium transition, which is inspired by the Nambu–Jona-Lasinio (NJL) model. Hadronic transitions of JPC=1-- higher charmonia with the emission of an η meson are studied in the framework of the proposed model. The model shows its potential to reproduce the observed decay widths and make predictions for the unobserved channels. We present our predictions for the decay width of Ψ→J/ψη and Ψ→hc(1P)η, where Ψ are higher S and D wave vector charmonia, which provide useful references to search for higher charmonia and determine their properties in forthcoming experiments. The predicted branching fraction B(ψ(4415)→hc(1P)η)=4.62×10-4 is one order of magnitude smaller than the J/ψη channel. Estimates of partial decay width Γ(Y→J/ψη) are given for Y(4360), Y(4390), and Y(4660) by assuming them as cc¯ bound states with quantum numbers 33D1, 33D1, and 53S1, respectively. Our results are in favor of these assignments for Y(4360) and Y(4660). The corresponding experimental data for these Y states has large statistical errors which do not provide any constraint on the mixing angle if we introduce S-D mixing. To identify Y(4390), precise measurements on its hadronic branching fraction are required which are eagerly awaited from BESIII. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review D American Physical Society (APS)

Modeling charmonium-η decays of JPC=1-- higher charmonia

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Modeling charmonium-η decays of JPC=1-- higher charmonia

Abstract

We propose a new model to create a light meson in the heavy quarkonium transition, which is inspired by the Nambu–Jona-Lasinio (NJL) model. Hadronic transitions of JPC=1-- higher charmonia with the emission of an η meson are studied in the framework of the proposed model. The model shows its potential to reproduce the observed decay widths and make predictions for the unobserved channels. We present our predictions for the decay width of Ψ→J/ψη and Ψ→hc(1P)η, where Ψ are higher S and D wave vector charmonia, which provide useful references to search for higher charmonia and determine their properties in forthcoming experiments. The predicted branching fraction B(ψ(4415)→hc(1P)η)=4.62×10-4 is one order of magnitude smaller than the J/ψη channel. Estimates of partial decay width Γ(Y→J/ψη) are given for Y(4360), Y(4390), and Y(4660) by assuming them as cc¯ bound states with quantum numbers 33D1, 33D1, and 53S1, respectively. Our results are in favor of these assignments for Y(4360) and Y(4660). The corresponding experimental data for these Y states has large statistical errors which do not provide any constraint on the mixing angle if we introduce S-D mixing. To identify Y(4390), precise measurements on its hadronic branching fraction are required which are eagerly awaited from BESIII.
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Publisher
The American Physical Society
Copyright
Copyright © © 2017 American Physical Society
ISSN
1550-7998
eISSN
1550-2368
D.O.I.
10.1103/PhysRevD.95.114031
Publisher site
See Article on Publisher Site

Abstract

We propose a new model to create a light meson in the heavy quarkonium transition, which is inspired by the Nambu–Jona-Lasinio (NJL) model. Hadronic transitions of JPC=1-- higher charmonia with the emission of an η meson are studied in the framework of the proposed model. The model shows its potential to reproduce the observed decay widths and make predictions for the unobserved channels. We present our predictions for the decay width of Ψ→J/ψη and Ψ→hc(1P)η, where Ψ are higher S and D wave vector charmonia, which provide useful references to search for higher charmonia and determine their properties in forthcoming experiments. The predicted branching fraction B(ψ(4415)→hc(1P)η)=4.62×10-4 is one order of magnitude smaller than the J/ψη channel. Estimates of partial decay width Γ(Y→J/ψη) are given for Y(4360), Y(4390), and Y(4660) by assuming them as cc¯ bound states with quantum numbers 33D1, 33D1, and 53S1, respectively. Our results are in favor of these assignments for Y(4360) and Y(4660). The corresponding experimental data for these Y states has large statistical errors which do not provide any constraint on the mixing angle if we introduce S-D mixing. To identify Y(4390), precise measurements on its hadronic branching fraction are required which are eagerly awaited from BESIII.

Journal

Physical Review DAmerican Physical Society (APS)

Published: Jun 1, 2017

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