Threshold and Kinematic Effects for the Exotic Resonance-Like Structures

Zhao, Qiang

doi:10.7566/jpscp.13.010008

Cited by 2 publications

(2 citation statements)

References 53 publications

(63 reference statements)

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“…(Wu et al, 2013), the f 1 (1420) matches the behavior of a genuine state in the KKπ channel that is distorted in other channels by an interference with the TS. This appears to be a more consistent picture to explain the existing data and underlying mechanisms (Zhao, 2017). These issues are discussed further in Sec.…”

Section: Scalars Below 1 Gevsupporting

confidence: 55%

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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Section: Scalars Below 1 Gevsupporting

confidence: 55%

Hadronic molecules

et al. 2018

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“…[43]. More recognitions of this special kinematic effects in various processes can be found in the literature [44][45][46][47][48][49][50][51][52][53][54][55][56][57][58] and recent reviews [28,59].…”

Section: Introductionmentioning

confidence: 99%

Revisiting the pseudoscalar meson and glueball mixing and key issues in the search for a pseudoscalar glueball state

2018

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We revisit the mixing mechanism for pseudoscalar mesons and glueball which is introduced by the axial vector anomaly. We demonstrate that the physical mass of the pseudoscalar glueball does not favor to be lower than 1.8 GeV if all the parameters are reasonably constrained. This conclusion, on the one hand, can accommodate the pseudoscalar glueball mass calculated by lattice QCD, and on the other hand, is consistent with the high-statistics analyses at BESIII that all the available measurements do not support the presence of two closely overlapping pseudoscalar states in any exclusive channel. Such a result is in agreement with the recent claim that the slightly shifted peak positions for two possible states ηð1405Þ and ηð1475Þ observed in different channels are actually originated from one single state with the triangle singularity interferences. By resolving this long-standing paradox, one should pay more attention to higher mass region for the purpose of searching for the pseudoscalar glueball candidate.

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Threshold and Kinematic Effects for the Exotic Resonance-Like Structures

Cited by 2 publications

References 53 publications

Hadronic molecules

Hadronic molecules

Revisiting the pseudoscalar meson and glueball mixing and key issues in the search for a pseudoscalar glueball state

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