Isospin violating decay 
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Yang, Bin; Wang, Bo; Meng, L.; Zhu, Shi-Lin

doi:10.1103/physrevd.101.054019

Cited by 12 publications

(9 citation statements)

References 62 publications

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“…[38], and the above mass value is almost identical to the mass of the J P = 1/2 −D * Ξ c molecular state predicted in Ref. [39]. Therefore, the present LHCb experiment [3] strongly supports the hadronic molecular picture once more.…”

Section: Introductionsupporting

confidence: 86%

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Establishing the first hidden-charm pentaquark with strangeness

et al. 2021

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We study the $$P_{cs}(4459)^0$$ P cs ( 4459 ) 0 recently observed by LHCb using the method of QCD sum rules. Our results support its interpretation as the $${{\bar{D}}}^* \varXi _c$$ D ¯ ∗ Ξ c hadronic molecular state of either $$J^P=1/2^-$$ J P = 1 / 2 - or $$3/2^-$$ 3 / 2 - . Within the hadronic molecular picture, the three LHCb experiments observing $$P_c$$ P c and $$P_{cs}$$ P cs states (Aaij et al., Phys Rev Lett 115:072001, 2015; Aaij et al., Phys Rev Lett 122:222001, 2019; Aaij et al., arXiv:2012.10380 [hep-ex], 2012) can be well understood as a whole. This strongly supports the existence of hadronic molecules, whose studies can significantly improve our understanding on the construction of the subatomic world. To verify this picture, we propose to further investigate the $$P_{cs}(4459)^0$$ P cs ( 4459 ) 0 to examine whether it can be separated into two states, and to search for the $${{\bar{D}}} \varXi _c$$ D ¯ Ξ c molecular state of $$J^P=1/2^{-}$$ J P = 1 / 2 - .

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Section: Introductionsupporting

confidence: 86%

“…Besides, in Ref. [39] the authors studied the P cs using the chiral effective field theory, and calculated the mass of the J P = 1/2 −D * Ξ c molecular state to be 4456.9 +3.2 −3.3 MeV. Note that both of these two references are based on the hadronic molecular picture.…”

Section: Introductionmentioning

confidence: 99%

Establishing the first hidden-charm pentaquark with strangeness

et al. 2021

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“…* c D * has binding energy 1 MeV in Ref. [28], it become an unbound state in our calculation. The argument for the unbound of the state in our work is that the σ -exchange potential plays a role only once, between u, d quarks, compared with P c calculation.…”

Section: Resultsmentioning

confidence: 60%

“…For example, the binding energy of [ c D] 1/2 is 6 MeV, whereas it is 13 MeV in Ref. [28], 58 MeV in Ref. [42], and 0.9-27 MeV in Ref.…”

Section: Resultsmentioning

confidence: 99%

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Investigation of hidden-charm pentaquarks with strangeness $$S=-1$$

Ping

2022

Eur. Phys. J. C

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Recently, a new hidden-charm pentaquark state $$P_{cs}(4459)$$ P cs ( 4459 ) was reported by the LHCb Collaboration. Stimulated by the fact that all hidden-charm pentaquark states in $$S=0$$ S = 0 systems were successfully studied by the chiral quark model, we extended this study to the $$S=-1$$ S = - 1 systems. All possible states with quantum numbers $$IJ^P=0(\frac{1}{2})^-$$ I J P = 0 ( 1 2 ) - , $$0(\frac{3}{2})^-$$ 0 ( 3 2 ) - , $$0(\frac{5}{2})^-$$ 0 ( 5 2 ) - , $$1(\frac{1}{2})^-$$ 1 ( 1 2 ) - , $$1(\frac{3}{2})^-$$ 1 ( 3 2 ) - and $$1(\frac{5}{2})^-$$ 1 ( 5 2 ) - have been investigated. The calculation results shows that the newly observed state $$P_{cs}(4459)$$ P cs ( 4459 ) can be explained as $$\Xi _c \bar{D}^*$$ Ξ c D ¯ ∗ molecular state and the quantum numbers are $$0(\frac{1}{2})^-$$ 0 ( 1 2 ) - . In addition, we also find other molecular states $$\Xi _c \bar{D}$$ Ξ c D ¯ , $$\Xi _c^* \bar{D}$$ Ξ c ∗ D ¯ and $$\Xi _c' \bar{D}^*$$ Ξ c ′ D ¯ ∗ . It is worth mentioning that $$\Xi _c \bar{D}^*$$ Ξ c D ¯ ∗ can form a two-peak structure from states in system $$0(\frac{1}{2})^-$$ 0 ( 1 2 ) - and $$0(\frac{3}{2})^-$$ 0 ( 3 2 ) - . The decay width of all molecular states is given with the help of real scaling method. These hidden-charm pentaquark states is expected to be further verified in future experiments.

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