Chiral multiplets of hadron currents

Cohen, Thomas D.; Ji, Xiangdong

doi:10.1103/physrevd.55.6870

Cited by 71 publications

(111 citation statements)

References 13 publications

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“…Note that older results (refs. [19,20]) reached a similar conclusion on the non-observability of U A (1) non restoration in two point functions, but only for N f ≥ 3. The new analysis [17] requires a careful consideration of the order of the limits and suggests that early work was inaccurate.…”

Section: U a (1)supporting

confidence: 56%

High Temperature QCD

Lombardo¹

2012

Proceedings of the 30th International Symposium on Lattice Field Theory — PoS(Lattice 2012)

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I review results on QCD at high temperature since lat year lattice conference. Topics include steady progress with staggered fermions and new developments with Wilson type fermions, either in the Quark Gluon Plasma phase, and in the transition region. Simulations with chiral quarks are coming of age,and togheter with theoretical developments trigger interesting developments in the analysis of the critical region. Issues related with the universality class of the chiral transition and the fate of the axial symmetry are discussed in the light of new numericaland analytical results. Transport coefficients and analysis of bottomonium spectra compare well with results of heavy ion collisions at RHIC and LHC. Model field theories, lattice simulations and high temperature systematic expansions help building a coherent picture of high temperature QCD. The (strongly coupled) Quark Gluon Plasma is heavily investigated, and asserts its role of inspiring theoretical laboratory.

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Section: U a (1)supporting

confidence: 56%

High Temperature QCD

Lombardo¹

2012

Proceedings of the 30th International Symposium on Lattice Field Theory — PoS(Lattice 2012)

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“…In the hadron spectra, chiral symmetry is clearly broken for the groundstates, but we expect chiral symmetry restoration high in the spectrum of hadrons (χRS) [11][12][13][14][15][16], with chiral doublets more and more degenerate,…”

Section: A Chiral Symmetry Restoration High In the Spectrummentioning

confidence: 99%

“…gested for instance by the large degeneracy observed in the meson spectra [21], chiral symmetry restoration in the excited spectrum [11][12][13][14][15][16].…”

Section: Arxiv:151209191v1 [Hep-lat] 31 Dec 2015mentioning

confidence: 99%

Chiral symmetry restoration in static-light mesons: A chiral restoration theorem, the quark running mass m(k) , and chiral restoration signals in the lattice QCD spectra

Bicudo

2016

Phys. Rev. D

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Chiral symmetry restoration high in the hadron spectra is expected but it remains to be confirmed both in lattice QCD computations and in experiments. Recently, a theorem was derived, relating chiral symmetry restoration high in the hadron spectra to the spontaneous generation of the dynamical quark mass in QCD. We refine the theorem in the case of static-light mesons. Utilizing chiral quark model computations and lattice QCD results for the spectrum of mesons composed by a static antiquark and a light quark, we explore chiral symmetry restoration in the spectrum and the quark running mass m(k).

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“…This implies that there is some higher symmetry, that includes SU (2) L × SU (2) R × U (1) A as a subgroup. This higher symmetry requires a degeneracy of all eight mesons from the Table I. All these eight mesons can be combined to a reduciblē qq representation, which is a product of two fundamental chiral quark representations [12]:…”

Section: Observations Symmetries and Their String Interpretationmentioning

confidence: 99%

Observation of a Dynamical QCD String

Glozman¹

2014

Acta Phys. Pol. B Proc. Suppl.

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Mesons constructed from the quark propagators without the lowest-lying eigenmodes of the Dirac operator reveal not only restored SU (2)L × SU (2)R chiral and U (1)A symmetries, but actually a higher symmetry. All possible chiral and U (1)A multiplets for the states of the same spin are degenerate, i.e., the energy of the observed quantum levels does not depend on the spin orientation of quarks in the system and their parities. The quark-spin independence of the energy levels implies absence of the magnetic interactions in the system. The ultrarelativistic quark-antiquark system with only the color-electric interactions can be interpreted (or defined) as a dynamical QCD string.

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Chiral multiplets of hadron currents

Cited by 71 publications

References 13 publications

High Temperature QCD

High Temperature QCD

Chiral symmetry restoration in static-light mesons: A chiral restoration theorem, the quark running mass m(k) , and chiral restoration signals in the lattice QCD spectra

Observation of a Dynamical QCD String

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