This title appears in the Scientific Report :
2015
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevD.92.071502 in citations.
Please use the identifier: http://hdl.handle.net/2128/9776 in citations.
How to reveal the exotic nature of the $P c ( 4450 )$
How to reveal the exotic nature of the $P c ( 4450 )$
The LHCb Collaboration announced two pentaquark-like structures in the $J/\psi p$ invariant mass distribution. We show that the current information on the narrow structure at 4.45 GeV is compatible with kinematical effects of the rescattering from $\chi_{c1} p$ to $J/\psi p$: First, it is located ex...
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Personal Name(s): | Guo, Feng-Kun (Corresponding author) |
---|---|
Meißner, Ulf-G. / Wang, Wei / Yang, Zhi | |
Contributing Institute: |
Theorie der Starken Wechselwirkung; IAS-4 Theorie der starken Wechselwirkung; IKP-3 |
Published in: | Physical Review D Physical review / D, 92 92 (2015 2015) 7 7, S. 071502 071502 |
Imprint: |
[S.l.]
Soc.
2015
2015-10-21 2015-10-01 |
DOI: |
10.1103/PhysRevD.92.071502 |
Document Type: |
Journal Article |
Research Program: |
TRR 110: Symmetrien und Strukturbildung in der Quantenchromodynamik Computational Science and Mathematical Methods |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/9776 in citations.
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245 | |a How to reveal the exotic nature of the $P c ( 4450 )$ | ||
260 | |a [S.l.] |c 2015 |b Soc. | ||
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500 | |a 9 pages, 4 figures. Version published in PRD as a Rapid Communication | ||
520 | |a The LHCb Collaboration announced two pentaquark-like structures in the $J/\psi p$ invariant mass distribution. We show that the current information on the narrow structure at 4.45 GeV is compatible with kinematical effects of the rescattering from $\chi_{c1} p$ to $J/\psi p$: First, it is located exactly at the $\chi_{c1} p$ threshold. Second, the mass of the four-star well-established $\Lambda(1890)$ is such that a leading Landau singularity from a triangle diagram can coincidentally appear at the $\chi_{c1} p$ threshold, and third, there is a narrow structure at the $\chi_{c1}\,p$ threshold but not at the $\chi_{c0} p$ and $\chi_{c2} p$ thresholds. In order to check whether that structure corresponds to a real exotic resonance, one has to measure the process $\Lambda_b^0\to K^-\chi_{c1} p$. If the $P_c(4450)$ structure exists in the $\chi_{c1} p$ invariant mass distribution as well, then the structure cannot be just a kinematical effect but is a real resonance, otherwise, one cannot conclude the $P_c(4450)$ to be another exotic hadron. In addition, it is also worthwhile to measure the decay $\Upsilon(1S)\to J/\psi p \bar p$: a narrow structure at 4.45 GeV but not at the $\chi_{c0} p$ and $\chi_{c2} p$ thresholds would exclude the possibility of a pure kinematical effect. | ||
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