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2015

Testing the $\chi_{c1}\, p$ composite nature of the $P_c(4450)$

Meißner, Ulf-G., Oller, José A.

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Making use of a recently proposed formalism, we analyze the composite nature of the $P_c(4450)$ resonance observed by LHCb.

We show that the present data suggest that this state is almost entirely made of a $\chi_{c1}$ and a proton, due to the close proximity to this threshold.
This also suppresses the decay modes into other, lighter channels, in our study represented by $J/\Psi p$.
We further argue that this is very similar to the case of the scalar meson $f_0(980)$ which is located closely to the $K\bar K$ threshold and has a suppressed decay into the lighter $\pi\pi$ channel.

Testing the $\chi_{c1}\, p$ composite nature of the $P_c(4450)$ · Around

Built on

S. Weinberg, Phys. Rev. 130
1963
Earlier work this paper cites.
J. A. Oller and E. Oset, Nucl. Phys. A 620
1999
Earlier work this paper cites.
J. A. Oller and U.-G. Meißner, Phys. Lett. B 500
2001
Earlier work this paper cites.

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Then

F. Aceti and E. Oset, Phys. Rev. D 86
Original
2012
Later among the works it cites.
T. Sekihara, T. Hyodo and D. Jido, PTEP 2015
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2015
Closest in time.
D. Agadjanov, F.-K. Guo, G. Rios and A. Rusetsky, JHEP 1501
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