Covariant study of tensor mesons

Krassnigg, A.; Blank, M.

doi:10.1103/physrevd.83.096006

Cited by 51 publications

(78 citation statements)

References 61 publications

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“…On the other hand, it is interesting to note that the situation is still acceptable for the lowest-lying tensor mesons with 2 ++ and 3 −− [301,384]; i.e., the states lying on the Regge trajectory J P C = {1 −− , 2 ++ , 3 −− } are well reproduced. In the potential language, what distinguishes these channels from the others is that the tensor force is either vanishing or particularly small.…”

Section: Mesonsmentioning

confidence: 95%

Baryons as relativistic three-quark bound states

Eichmann

Sanchis-Alepuz

Williams

et al. 2016

Progress in Particle and Nuclear Physics

421

530

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We review the spectrum and electromagnetic properties of baryons described as relativistic three-quark bound states within QCD. The composite nature of baryons results in a rich excitation spectrum, whilst leading to highly non-trivial structural properties explored by the coupling to external (electromagnetic and other) currents. Both present many unsolved problems despite decades of experimental and theoretical research. We discuss the progress in these fields from a theoretical perspective, focusing on nonperturbative QCD as encoded in the functional approach via Dyson-Schwinger and Bethe-Salpeter equations. We give a systematic overview as to how results are obtained in this framework and explain technical connections to lattice QCD. We also discuss the mutual relations to the quark model, which still serves as a reference to distinguish 'expected' from 'unexpected' physics. We confront recent results on the spectrum of non-strange and strange baryons, their form factors and the issues of two-photon processes and Compton scattering determined in the DysonSchwinger framework with those of lattice QCD and the available experimental data. The general aim is to identify the underlying physical mechanisms behind the plethora of observable phenomena in terms of the underlying quark and gluon degrees of freedom.

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Section: Mesonsmentioning

confidence: 95%

Baryons as relativistic three-quark bound states

Eichmann

Sanchis-Alepuz

Williams

et al. 2016

Progress in Particle and Nuclear Physics

421

530

View full text Add to dashboard Cite

show abstract

“…A particular state is characterized by the Poincaré covariant quantum numbers J P(C) (C of course only when it is an eigenstate of the charge conjugation operator), which determines the basis elements to construct the bound state's BSA [78]. At this point, any particular Lorentz frame may be chosen.…”

Section: Th Quark Confinement and The Hadron Spectrummentioning

confidence: 99%

Charming quasi-exotic open-flavor mesons

Hilger

Krassnigg

2017

EPJ Web Conf.

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“…On hadron property side, which is usually taken as the calibration to fix the parameter(s) in the DS equation approach, it has been shown that the bare vertex truncation leads to it only accurate for ground-state vector-and isospinnonzero-pseudoscalar mesons [64,66,67] because corrections in these channels largely cancel each other owing to the parameter-free preservation of the Ward-GreenTakahashi (WGT) identities [82][83][84]. The corrections do not cancel in other channels [85][86][87][88], studies based on such a truncation have thus provided usually poor results for scalar, axial-vector and exotic state mesons [89][90][91][92][93][94], and exhibited gross sensitivity to model parameters for excited states [93][94][95][96] and tensor mesons [97].…”

Section: Introductionmentioning

confidence: 99%

QCD phase transitions via a refined truncation of Dyson-Schwinger equations

Gao

Liu

2016

Phys. Rev. D

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We investigate both the chiral and deconfinement phase transitions of QCD matter in a refined scheme of Dyson-Schwinger equations, which have been shown to be successful in giving the meson mass spectrum and matching the interaction with the results from ab initio computation. We verify the equivalence of the chiral susceptibility criterion with different definitions for the susceptibility and confirm that the chiral susceptibility criterion is efficient to fix not only the chiral phase boundary but also the critical end point (CEP), especially when one could not have the effective thermodynamical potential. We propose a generalized Schwinger function criterion for the confinement. We give the phase diagram of both phase transitions and show that in the refined scheme the position of the CEP shifts to lower chemical potential and higher temperature. Based on our calculation and previous results of the chemical freeze out conditions, we propose that the CEP locates in the states of the matter generated by the Au-Au collisions with √ s NN = 9 ∼ 15 GeV.

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Covariant study of tensor mesons

Cited by 51 publications

References 61 publications

Baryons as relativistic three-quark bound states

Baryons as relativistic three-quark bound states

Charming quasi-exotic open-flavor mesons

QCD phase transitions via a refined truncation of Dyson-Schwinger equations

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