Isospin violating decay of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>ψ</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>3770</mml:mn><mml:mo stretchy="false">)</mml:mo><mml:mo>→</mml:mo><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi><mml:mo>+</mml:mo><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:math>

Guo, Zhongyu; Narison, Stéphan; Richard, Jean‐Marc; Zhao, Qiang

doi:10.1103/physrevd.85.114007

Cited by 10 publications

(7 citation statements)

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“…It is interesting to note that the closeness of the ψ(3770) to the DD mass threshold leads to novel features concerning the locally broken quark-hadron duality. As studied in the literature, for those charmonium states well below or isolated from an open charm threshold, the contributions from intermediate charmed meson loops turns out to be rather small and the sum of those loops generally leads to a cumulative reduction effect [25,43,50]. Such an effect may become significant when a threshold is located in the vicinity of the state while other thresholds are relatively far away.…”

Section: Numerical Resultsmentioning

confidence: 95%

“…Such a difference indicates that the vertex form factor which takes care of the non-local effects may depend on the kinematics strongly as shown in Ref. [43]. Another source of the uncertainties arising from ψ(3770) → J/ψη is the SU(3) flavor symmetry breaking.…”

Section: Numerical Resultsmentioning

confidence: 97%

“…With more and more data from Belle, BaBar, CLEO and BES-III, it is broadly recognized that the intermediate hadron loops can be closely related to a lot of non-perturbative phenomena observed in experiment, e.g. apparent OZI-rule violations [27,[29][30][31][32][33][34][35][36][37][38][39][40][41][42], helicity selection rule violations [29][30][31], and isospin symmetry breakings in charmonium decays [43,44]. In this work, we present a more detailed analysis of the ψ(3770) non-DD decays into a pair of vector and pseudoscalar mesons.…”

Section: Introductionmentioning

confidence: 99%

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Further understanding of the non-DD¯decays ofψ(3770)

Liu

Wang

et al. 2013

Phys. Rev. D

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We provide details of the study of ψ(3770) non-DD decays into V P , where V and P denote light vector meson and pseudoscalar meson, respectively. We find that the electromagnetic (EM) interaction plays little role in these processes, while the strong interaction dominates. The strong interaction can be separated into two parts, i.e. the short-distance part probing the wave function at origin and the long-distance part reflecting the soft gluon exchanged dynamics. The long-distance part is thus described by the intermediate charmed meson loops. We show that the transition of ψ(3770) → V P can be related to ψ(3686) → V P such that the parameters in our model can be constrained by comparing the different parts in ψ(3770) → V P to those in ψ(3686) → V P . Our quantitative results confirm the findings of [Zhang et al., Phys. Rev. Lett. 102, 172001 (2009)] that the OZI-rule-evading long-distance strong interaction via the IML plays an important role in ψ(3770) decays, and could be a key towards a full understanding of the mysterious ψ(3770) non-DD decay mechanism.

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Section: Numerical Resultsmentioning

confidence: 95%

Section: Numerical Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Further understanding of the non-DD¯decays ofψ(3770)

Liu

Wang

et al. 2013

Phys. Rev. D

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“…The effects of meson loops in heavy quarkonium spectrum are investigated in, e.g., Refs (Bali et al, 2011;Barnes and Swanson, 2008;. Danilkin and Simonov, 2010a,b;Du et al, 2016;Eichten et al, 1978Eichten et al, , 1980Eichten et al, , 2006Ferretti et al, 2013Hammer et al, 2016;Kalashnikova, 2005;Li et al, 2009;Liu and Ding, 2012;Lu et al, 2016Lu et al, , 2017Ono and Törnqvist, 1984;Ortega et al, 2010;Pennington and Wilson, 2007; Xiao, 2014, 2017), and in heavy quarkonium transitions in Refs Guo et al, 2012;Li and . Zhao, 2008, 2011;Lipkin and Tuan, 1988;Liu et al, 2009b; Meng and Chao, 2008a,b;Moxhay, 1989;Ono et al, 1985;Wang et al, 2012Wang et al, , 2011aZhang et al, 2009b;Zhang and Zhao, 2010;Zhou and Kuang, 1991).…”

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confidence: 99%

Hadronic molecules

et al. 2018

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A large number of experimental discoveries especially in the heavy quarkonium sector that did not at all fit to the expectations of the until then very successful quark model led to a renaissance of hadron spectroscopy. Among various explanations of the internal structure of these excitations, hadronic molecules, being analogues of light nuclei, play a unique role since for those predictions can be made with controlled uncertainty. We review experimental evidences of various candidates of hadronic molecules, and methods of identifying such structures. Nonrelativistic effective field theories are the suitable framework for studying hadronic molecules, and are discussed in both the continuum and finite volumes. Also pertinent lattice QCD results are presented. Further, we discuss the production mechanisms and decays of hadronic molecules, and comment on the reliability of certain assertions often made in the literature.

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“…The intermediate states would contribute the dispersive (real) part of the box-diagram (loop) amplitudes beyond the K * Λ and K * Σ thresholds. The real part can be determined via the dispersion relation [58],…”

Section: The Real Part Of the Box Diagram Amplitudesmentioning

confidence: 99%

Contributions of box diagrams and $Δ(1940)$ resonance to $K^0Σ^+$ photoproduction

Liu,

Samart,

et al. 2019

Preprint

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We study first the box-diagram contribution to the γp → K 0 Σ + process to understand the anomaly of the kaon photoproduction cross section from CBELSA/TAPS experiment at Electron Stretcher Accelerator (ELSA), where the imaginary part of the scattering amplitude from the boxdiagrams is calculated by using Cutkosky's rules in the on-shell approximation while the real part of the amplitude is derived by dispersion relation calculations. Together with the results of the K-MAID model, the contribution of the box-diagrams fails to provide the sudden drop of the differential cross-section between the K * Λ and K * Σ thresholds. In addition, we include the ∆(1940) resonance in the process to complete the description of the differential cross-section. Combining the contributions from the K-MAID model, the box-diagrams and the ∆(1940) resonance, we have obtained the theoretical differential cross-section the γp → K 0 Σ + process, which is compatible with the CBELSA/TAPS experimental data.

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Isospin violating decay ofψ(3770)→J/ψ+π0

Cited by 10 publications

References 50 publications

Further understanding of the non-DD¯decays ofψ(3770)

Further understanding of the non-DD¯decays ofψ(3770)

Hadronic molecules

Contributions of box diagrams and $Δ(1940)$ resonance to $K^0Σ^+$ photoproduction

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