ORCID Profile
0000-0002-2919-2064
Current Organisation
Institute of Theoretical Physics Chinese Academy of Sciences
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Publisher: Sissa Medialab
Date: 16-02-2018
DOI: 10.22323/1.310.0117
Publisher: MDPI AG
Date: 28-09-2020
DOI: 10.3390/SYM12101611
Abstract: We analyze possible singularities in the J/ψΛ invariant mass distribution of the Ξb−→K−J/ψΛ process via triangle loop diagrams. Triangle singularities in the physical region are found in 18 different triangle loop diagrams. Among those with Ξ*-charmonium-Λ intermediate states, the one from the χc1Ξ(2120)Λ loop, which is located around 4628 MeV, is found the most likely to cause observable effects. One needs S- and P-waves in χc1Λ and J/ψΛ systems, respectively, when the quantum numbers of these systems are 1/2+ or 3/2+. When the quantum numbers of the Ξ(2120) are JP=1/2+, 1/2− or 3/2+, the peak structure should be sharper than the other JP choices. This suggests that although the whole strength is unknown, we should pay attention to the contributions from the Ξ*-charmonium-Λ triangle diagram if structures are observed in the J/ψΛ invariant mass spectrum experimentally. In addition, a few triangle diagrams with the Ds1*(2700) as one of the intermediate particles can also produce singularities in the J/ψΛ distribution, but at higher energies above 4.9 GeV.
Publisher: American Physical Society (APS)
Date: 31-10-2014
Publisher: American Physical Society (APS)
Date: 21-02-2017
Publisher: American Physical Society (APS)
Date: 13-05-2021
Publisher: American Physical Society (APS)
Date: 08-02-2018
Publisher: American Physical Society (APS)
Date: 20-11-2018
Publisher: American Physical Society (APS)
Date: 29-09-2023
Publisher: AIP
Date: 2011
DOI: 10.1063/1.3575091
Publisher: American Physical Society (APS)
Date: 13-02-2020
Publisher: American Physical Society (APS)
Date: 03-02-2014
Publisher: Elsevier BV
Date: 08-2013
Publisher: American Physical Society (APS)
Date: 21-08-2009
Publisher: American Physical Society (APS)
Date: 14-10-2010
Publisher: Springer Science and Business Media LLC
Date: 27-06-2009
Publisher: Springer Science and Business Media LLC
Date: 03-2021
DOI: 10.1140/EPJA/S10050-021-00413-Y
Abstract: Physical states are characterised uniquely by their pole positions and the corresponding residues. Accordingly, in those parameters also the nature of the states should be encoded. For bound states (poles on the real s -axis below the lowest threshold on the physical sheet) there is an established criterion formulated originally by Weinberg in the 1960s, which allows one to estimate the amount of compact and molecular components in a given state. We demonstrate in this paper that this criterion can be straightforwardly extended to shallow virtual states (poles on the real s -axis below the lowest threshold on the unphysical sheet) which should be classified as molecular. We argue that predominantly non-molecular or compact states exist either as bound states or as resonances (poles on the unphysical sheet off the real energy axis) but not as virtual states. We also discuss the limitations of the mentioned classification scheme.
Publisher: Springer Science and Business Media LLC
Date: 18-04-2009
Publisher: Elsevier BV
Date: 04-2011
Publisher: American Physical Society (APS)
Date: 07-07-2015
Publisher: Elsevier BV
Date: 07-2008
Publisher: American Physical Society (APS)
Date: 03-08-2015
Publisher: Springer Science and Business Media LLC
Date: 30-09-2008
Publisher: American Physical Society (APS)
Date: 22-04-2016
Publisher: American Physical Society (APS)
Date: 29-03-2021
Publisher: Springer Science and Business Media LLC
Date: 02-2011
Publisher: American Physical Society (APS)
Date: 10-11-2010
Publisher: Sissa Medialab
Date: 05-10-2009
DOI: 10.22323/1.069.0054
Publisher: Springer Science and Business Media LLC
Date: 11-2020
DOI: 10.1140/EPJC/S10052-020-08620-5
Abstract: The photoproduction of the $$J/\\psi $$ J / ψ off the proton is believed to deepen our understanding of various physics issues. On the one hand, it is proposed to provide access to the origin of the proton mass, based on the QCD multipole expansion. On the other hand, it can be employed in a study of pentaquark states. The process is usually assumed to proceed through vector-meson dominance, that is the photon couples to a $$J/\\psi $$ J / ψ which rescatters with the proton to give the $$J/\\psi p$$ J / ψ p final state. In this paper, we provide a compelling hint for and propose measurements necessary to confirm a novel production mechanism via the $$\\varLambda _c \\bar{D}^{(*)}$$ Λ c D ¯ ( ∗ ) intermediate states. In particular, there must be cusp structures at the $$\\varLambda _c \\bar{D}^{(*)}$$ Λ c D ¯ ( ∗ ) thresholds in the energy dependence of the $$J/\\psi $$ J / ψ photoproduction cross section. The same mechanism also implies the $$J/\\psi $$ J / ψ -nucleon scattering lengths of order 1 mfm. Given this, one expects only a minor contribution of charm quarks to the nucleon mass.
Publisher: American Physical Society (APS)
Date: 09-04-2013
Publisher: American Physical Society (APS)
Date: 19-06-2009
Publisher: Elsevier BV
Date: 09-2011
Publisher: American Physical Society (APS)
Date: 19-08-2010
Publisher: American Physical Society (APS)
Date: 02-02-2015
Publisher: American Physical Society (APS)
Date: 24-01-2022
Publisher: Elsevier BV
Date: 03-2015
Publisher: Journal of the Physical Society of Japan
Date: 23-05-2016
Publisher: Oxford University Press (OUP)
Date: 02-2020
DOI: 10.1093/PTEP/PTAA008
Publisher: American Physical Society (APS)
Date: 19-02-2020
Publisher: IOP Publishing
Date: 30-11-2017
Publisher: American Physical Society (APS)
Date: 10-04-2020
Publisher: American Physical Society (APS)
Date: 22-04-2022
Publisher: Elsevier BV
Date: 07-2009
Publisher: Sissa Medialab
Date: 28-04-2014
DOI: 10.22323/1.187.0239
Publisher: American Physical Society (APS)
Date: 19-11-2018
Publisher: Springer Science and Business Media LLC
Date: 22-09-2023
Publisher: American Physical Society (APS)
Date: 24-01-2013
Publisher: American Physical Society (APS)
Date: 27-03-2015
Publisher: Springer Science and Business Media LLC
Date: 10-2011
Publisher: American Physical Society (APS)
Date: 07-09-2021
Publisher: Springer Science and Business Media LLC
Date: 09-2014
Publisher: Springer Science and Business Media LLC
Date: 14-04-2010
Publisher: EDP Sciences
Date: 2017
Publisher: American Physical Society (APS)
Date: 11-02-2011
Publisher: IOP Publishing
Date: 05-2023
Abstract: The internal structure of the charm-strange mesons D s 0 * ( 2317 ) and D s 1 (2460) are the subject of intensive studies. Their widths are small because they decay dominantly through isospin-breaking hadronic channels D s 0 * ( 2317 ) + → D s + π 0 and D s 1 ( 2460 ) + → D s * + π 0 . The D s 1 (2460) can also decay into the hadronic final states D s + π π , conserving isospin. In that case there is, however, a strong suppression from phase space. We study the transition D s 1 ( 2460 ) + → D s + π + π − in the scenario that the D s 1 (2460) is a D * K hadronic molecule. The π π final state interaction is taken into account through dispersion relations. We find that the ratio of the partial widths of the Γ ( D s 1 ( 2460 ) + → D s + π + π − ) / Γ ( D s 1 ( 2460 ) + → D s * + π 0 ) obtained in the molecular picture is consistent with the existing experimental measurement. More interestingly, we demonstrate that the π + π − invariant mass distribution shows a double bump structure, which can be used to disentangle the hadronic molecular picture from the compact state picture for the D s 1 (2460) + . Predictions on the B s 1 0 → B s 0 π + π − are also made.
Location: Germany
Location: China
Location: China
No related grants have been discovered for Feng-Kun Guo.