Revisiting hidden-charm pentaquarks from QCD sum rules

Xiang, Jia-Bing; Chen, Hua-Xing; Chen, Wei; Li, Xiaobo; Yao, Xingqun; Zhu, Shi-Lin

doi:10.1088/1674-1137/43/3/034104

Cited by 16 publications

(12 citation statements)

References 75 publications

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“…In Refs. [63][64][65] we have found that these three configurations can be related as a whole, while in the present study we shall further find that two of them are already enough to be related to each other, just with the color-octetcolor-octet meson-baryon terms included. Using these relations, we shall study strong decay properties of P c states as D ( * ) Σ c molecular states.…”

Section: Introductionsupporting

confidence: 54%

Decay properties of $$P_c$$ states through the Fierz rearrangement

Chen

2020

Eur. Phys. J. C

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We systematically study hidden-charm pentaquark currents with the quark configurations $$[\bar{c} u][u d c]$$ [ c ¯ u ] [ u d c ] , $$[\bar{c} d][u u c]$$ [ c ¯ d ] [ u u c ] , and $$[\bar{c} c][u u d]$$ [ c ¯ c ] [ u u d ] . Some of their relations are derived using the Fierz rearrangement of the Dirac and color indices, and the obtained results are used to study strong decay properties of $$P_c$$ P c states as $$\bar{D}^{(*)} \varSigma _c$$ D ¯ ( ∗ ) Σ c hadronic molecules. We calculate their relative branching ratios for the $$J/\psi p$$ J / ψ p , $$\eta _c p$$ η c p , $$\chi _{c0} p$$ χ c 0 p , $$\chi _{c1} p$$ χ c 1 p , $$\bar{D}^{(*)0} \varLambda _c^+$$ D ¯ ( ∗ ) 0 Λ c + , $$\bar{D}^{0} \varSigma _c^{+}$$ D ¯ 0 Σ c + , and $$\bar{D}^{-} \varSigma _c^{++}$$ D ¯ - Σ c + + decay channels. We propose to search for the $$P_c(4312)$$ P c ( 4312 ) in the $$\eta _c p$$ η c p channel and the $$P_c(4440)/P_c(4457)$$ P c ( 4440 ) / P c ( 4457 ) in the $$\bar{D}^{0} \varLambda _c^+$$ D ¯ 0 Λ c + channel.

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Section: Introductionsupporting

confidence: 54%

Decay properties of $$P_c$$ states through the Fierz rearrangement

Chen

2020

Eur. Phys. J. C

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“…There is still a place for the P c (4380), that is to be interpreted as the [Σ c D * − ] bound state with J P = 3/2 − . There exist more possible interpretations with the positive-parity assignments [11,34]. To clearly understand their nature, one still needs further experi-mental information.…”

Section: Currentmentioning

confidence: 99%

Possible interpretations of the Pc(4312) , Pc(4440) , and

2019

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Based on our previous QCD sum rule studies on hidden-charm pentaquark states, we discuss possible interpretations of the Pc(4312), Pc(4440), and Pc (4457), which were recently observed by LHCb. Our results suggest that the Pc(4312) can be well interpreted as the [Σ ++ cD − ] bound state with J P = 1/2 − , while the Pc(4440) and Pc(4457) can be interpreted as the [Σ + cD 0 ] bound state with J P = 1/2 − , the [Σ * ++ cD − ] and [Σ + cD * 0 ] bound states with J P = 3/2 − , or the [Σ * + cD * 0 ] bound state with J P = 5/2 − . We propose to measure their spin-parity quantum numbers to verify these assignments. cD − ] bound state with J P = 3/2 − , while the P + c (4457) as the [Σ + cD * 0 ] bound state with J P = 3/2 − .

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“…The main decay channels of Λcc(4550) areD ( * ) Ξ or the mixture of them [37,38]. Secondly, they are considered in constituent quark model [39][40][41][42], diquarkdiquark-antiquark picture [43][44][45][46][47], and diquark-triquark picture [48]. Thirdly, the narrow peak of P c (4450) might result from triangle singularity (TS) effect [49][50][51], which is purely kinematic effect, although for some quantum numbers of the P c state preferred in Ref.…”

mentioning

confidence: 99%

Decay behaviors of possible Λcc¯ states in hadronic molecule pictures

Shen

Zou

2019

Phys. Rev. D

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In 2010, Λ * cc states were predicted as the strange number S = −1 partners of N * cc , which are well known now as the Pc states and observed experimentally by LHCb Collaboration. We analyze the decay behaviors of Λcc as S-wave hadronic molecules within the effective Lagrangian framework by a similar method, which has been applied on Pc states successfully. With partial widths of possible decay channels calculated, we find that Λcc(4213) and Λcc (4403), which are formed as pseudoscalar meson baryon molecules, mainly decay to the ηcΛ channel. For the two vector meson baryon molecule states, our results show that the total decay width with J P = 1 2 − is by one order of magnitude larger than that with J P = 3 2 − . The decay patterns and relative decay ratios are very different for Λcc(4370) being a D * − s Λ + c orD * Ξc molecule state. The main decay channels of Λcc(4550) areD ( * ) Ξ ( * , ) c because of the pseudoscalar meson exchange mechanism. In addition,D * Ξc is the dominant decay channel of Λcc(4490) which is assumed as aDΞ * c bound state. These decay patterns of the Λ * cc states would provide a guidance for their future experimental searches and help us to understand their internal structures.

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Revisiting hidden-charm pentaquarks from QCD sum rules

Cited by 16 publications

References 75 publications

Decay properties of $$P_c$$ states through the Fierz rearrangement

Decay properties of $$P_c$$ states through the Fierz rearrangement

Possible interpretations of the Pc(4312) , Pc(4440) , and

Decay behaviors of possible Λcc¯ states in hadronic molecule pictures

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