$P_{cs}(4459)$ and other possible molecular states from $Ξ_{c}^{(*)}\bar{D}^{(*)}$ and $Ξ'_c\bar{D}^{(*)}$ interactions

Zhu, Jun-Tao; Song, Lin-Qing; He, Jun

doi:10.48550/arxiv.2101.12441

Cited by 5 publications

(10 citation statements)

References 55 publications

(67 reference statements)

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“…The experiment did not confirm or contradict the existence of the two-peak hypothesis. The result inspired various theoretical works [401,324,402,357,403,404,405,406,407,408]. Most of them favored the P cs as the Ξ c D * molecule [403,401,404,405,406,407,408,409].…”

Section: P C and P Cssupporting

confidence: 65%

Chiral perturbation theory for heavy hadrons and chiral effective field theory for heavy hadronic molecules

Li¹,

Wang²,

Wang³

et al. 2022

Preprint

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Chiral symmetry and its spontaneous breaking play an important role both in the light hadron and heavy hadron systems. In this work, we shall review the investigations on the chiral corrections to the properties of the heavy mesons and baryons within the framework of the chiral perturbation theory (χPT). We will also review the scatterings of the light pseudoscalar mesons and heavy hadrons. Moreover, the modern nuclear force was built upon the chiral effective field theory (χEFT). In the past decades many new hadron states were observed experimentally. A large group of these states are near-threshold resonances, such as the charged charmoniumlike Z c and Z cs states, bottomoniumlike Z b states, hidden-charm pentaquark P c and P cs states and the doubly charmed T cc state etc. They are very good candidates of the loosely bound molecular states composed of a pair of charmed hadrons. The same chiral dynamics not only governs the nuclei and forms the deuteron, but also dictates the above shallow bound states or resonances. We will perform an extensive review on the progress on the heavy hadronic molecular states within the framework of χEFT.

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Section: P C and P Cssupporting

confidence: 65%

Chiral perturbation theory for heavy hadrons and chiral effective field theory for heavy hadronic molecules

Li¹,

Wang²,

Wang³

et al. 2022

Preprint

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“…Later in Ref. [681] the authors performed a coupled-channel analysis of the D * Ξ * c , D * Ξ c , DΞ * c , D * Ξ c , DΞ c , and DΞ c interactions in the quasipotential Bethe-Salpeter equation approach. They found two D * Ξ c molecular states of J P = 1/2 − and 3/2 − .…”

Section: Hidden-charm Pentaquark State P Cs (4459)mentioning

confidence: 99%

An updated review of the new hadron states

Chen¹,

Chen²,

Liu³

et al. 2022

Preprint

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The past decades witnessed the golden era of hadron physics. Many excited open heavy flavor mesons and baryons have been observed since 2017. We shall provide an updated review of the recent experimental and theoretical progresses in this active field. Besides the conventional heavy hadrons, we shall also review the recently observed open heavy flavor tetraquark states X(2900) and T + cc (3875) as well as the hidden heavy flavor multiquark states X(6900), P cs (4459) 0 , Z cs (3985) − , Z cs (4000) + , and Z cs (4220) + . We will also cover the recent progresses on the glueballs and light hybrid mesons, which are the direct manifestations of the non-Abelian SU (3) gauge interaction of the Quantum Chromodynamics in the low-energy region.

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“…of the same order of magnitude of the aforementioned 11.3 MeV difference in binding between the P c and P cs binding. For comparison, a recent phenomenological calculation provides a similar hyperfine splitting [110] of ∆B CC = (2.4 − 20.0) MeV. But this contact-range theory provides us with a very interesting advantage: we can explicitly turn off the coupled channel effects within the theory, which following the formalism of Ref.…”

Section: Scalar Meson Singlet Vs Nonetmentioning

confidence: 97%

“…The P cs (4459) is 19.2 MeV below the D * Ξ c threshold -4478.0 MeV in the isospin symmetric limit -, which is why the P cs (4459) has been conjectured to be a D * Ξ c molecule [106][107][108][109][110]. The charmed baryon Ξ c is a flavor antitriplet with quark content csu (Ξ + c ) and csd (Ξ 0 c ), where the light-quark pair within the Ξ c is in a S L = 0 configuration, with S L the total light-quark spin.…”

Section: Scalar Meson Singlet Vs Nonetmentioning

confidence: 99%

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Axial meson exchange and the $Z_c(3900)$ and $Z_{cs}(3985)$ resonances as heavy hadron molecules

Yan,

Peng,

Sánchez

et al. 2021

Preprint

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Early speculations about the existence of heavy hadron molecules were grounded on the idea that lightmeson exchanges forces could lead to binding. In analogy to the deuteron, the light-mesons usually considered include the pion, sigma, rho and omega, but not the axial meson a 1 (1260). Though it has been argued in the past that the coupling of the axial meson to the nucleons is indeed strong, its mass is considerably heavier than that of the vector mesons and thus its exchange ends up being suppressed. Yet, this is not necessarily the case in heavy hadrons molecules: we find that even though the contribution to binding from the axial meson is modest, it cannot be neglected in the isovector sector where vector meson exchange cancels out. This might provide a natural binding mechanism for molecular candidates such as the Z c (3900), Z c (4020) or the more recently observed Z cs (3985). However the Z cs (3985) is much more dependent on the nature of scalar meson exchange (in particular whether the sigma has a sizable coupling to the strange quark) than on the contribution of the axial mesons. This later observation might also be relevant for the strange hidden-charm pentaquark P cs (4459).

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$P_{cs}(4459)$ and other possible molecular states from $Ξ_{c}^{()}\bar{D}^{()}$ and $Ξ'_c\bar{D}^{(*)}$ interactions

Abstract: P cs (4459) and other possible molecular states from Ξ ( * ) c D( * ) and Ξ ′ c D( * ) interactions

Cited by 5 publications

References 55 publications

Chiral perturbation theory for heavy hadrons and chiral effective field theory for heavy hadronic molecules

Chiral perturbation theory for heavy hadrons and chiral effective field theory for heavy hadronic molecules

An updated review of the new hadron states

Axial meson exchange and the $Z_c(3900)$ and $Z_{cs}(3985)$ resonances as heavy hadron molecules

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