$\bar{D}\Sigma^*_c$ and $\bar{D}^*\Sigma_c$ interactions and the LHCb hidden-charmed pentaquarks - INSPIRE

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$\bar{D}\Sigma^_c$ and $\bar{D}^\Sigma_c$ interactions and the LHCb hidden-charmed pentaquarks

Jun He
(
)

Jul 18, 2015

5 pages

Published in:

Phys.Lett.B 753 (2016) 547-551

Published: Feb 10, 2016

e-Print:

1507.05200 [hep-ph]

DOI:

10.1016/j.physletb.2015.12.071

Experiments:

CERN-LHC-LHCb

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Abstract: (Elsevier)

Very recently, two hidden-charmed resonances Pc(4380) and Pc(4450) consistent with pentaquark states were observed at the LHCb detector. The two Pc states locate just below the D¯Σc⁎ and D¯⁎Σc thresholds with mass of gaps about 5 and 15 MeV, respectively. Inspired by this fact we perform a dynamical investigation about the D¯Σc⁎(2520) and D¯⁎Σc(2455) interactions which are described by the meson exchanges. A bound state which carries spin-parity JP=3/2− is produced from the D¯Σc⁎(2520) interaction, which is consistent with the Pc(4380) observed at the LHCb detector. From the D⁎Σc(2455) interaction, a bound state with 5/2+ is produced, which can be related to the Pc(4450) . The results suggest that the Pc(4380) and Pc(4450) are good candidates of D¯Σc⁎(2520) and D¯⁎Σc(2455) molecular states, respectively.

Note:

5 pages, 3 figures, published version in Phys. Lett. B

Hidden-charmed pentaquark
Hadronic molecular state
The D¯Σc⁎ and D¯⁎Σc interactions
The Bethe–Saltpeter equation
The [formula omitted] and [formula omitted] interactions
pentaquark: model
pentaquark: charm
anti-D
Sigma/c(2455)
Sigma/c(2520)

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