Meson Mass Spectrum from First Order Static Cavity Wavefunctions

Large-basis O(g) static cavity wavefunctions, containing bremsstrahlung and quark-sea states, previously fitted to the light quark meson sector, are applied to the ground-state meson spectrum in general. The only parameters of the model in the heavy quark sector are the quark masses me and mb which we fit to D and B states. Predictions for the meson mass spectrum are given and are found to be a significant improvement over the predictions of the original. MIT model.

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An approach to the instanton effect in B system

International Journal of Modern Physics A ◽

10.1142/s0217751x18500173 ◽

2018 ◽

Vol 33 (02) ◽

pp. 1850017

Author(s):

Noriaki Kitazawa ◽

Yuki Sakai

Keyword(s):

Mass Spectrum ◽

Chiral Symmetry Breaking ◽

Light Quark ◽

Heavy Meson ◽

Effective Theory ◽

Meson Mass ◽

Quark Masses ◽

Quark Interaction ◽

Up Quark ◽

Instanton Effect

We discuss the constraint on the size of QCD instanton effects in low-energy effective theory. Among various instanton effects in meson mass spectrum and dynamics, we concentrate on the instanton-induced masses of light quarks. The famous instanton-induced six-quark interaction, so-called ’t Hooft vertex, could give nonperturbative quantum corrections to light quark masses. Many works have already been achieved to constrain the mass corrections in light meson system, or the system of [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text], and now we know for a fact that the instanton-induced mass of up-quark is too small to realize the solution of the strong CP problem by vanishing current mass of up-quark. In this work, we give a constraint on the instanton-induced mass correction to light quarks from the mass spectrum of heavy mesons, [Formula: see text], [Formula: see text], [Formula: see text] and their antiparticles. To accomplish this, the complete second-order chiral symmetry breaking terms are identified in heavy meson effective theory. We find that the strength of the constraint from heavy meson masses is at the same level of that from light mesons, and it would be made even stronger by more precise data from future [Formula: see text] factories and lattice calculations.

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Quark mass determinations in QCD

Modern Physics Letters A ◽

10.1142/s0217732314300316 ◽

2014 ◽

Vol 29 (28) ◽

pp. 1430031 ◽

Cited By ~ 2

Author(s):

C. A. Dominguez

Keyword(s):

Heavy Quark ◽

Light Quark ◽

Finite Energy ◽

Experimental Information ◽

Bottom Quarks ◽

Spectral Functions ◽

Quark Masses ◽

Quark Sector ◽

Vector Channel ◽

Systematic Uncertainties

Recent progress on QCD sum rule determinations of the light and heavy quark masses is reported. In the light quark sector a major breakthrough has been made recently in connection with the historical systematic uncertainties due to a lack of experimental information on the pseudoscalar resonance spectral functions. It is now possible to suppress this contribution to the 1% level by using suitable integration kernels in Finite Energy QCD sum rules. This allows to determine the up-, down-, and strange-quark masses with an unprecedented precision of some 8–10%. In the heavy quark sector, the availability of experimental data in the vector channel, and the use of suitable multipurpose integration kernels allows to increase the accuracy of the charm- and bottom-quarks masses to the 1% level.

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QUARK MASSES IN QCD: A PROGRESS REPORT

Modern Physics Letters A ◽

10.1142/s0217732311035614 ◽

2011 ◽

Vol 26 (10) ◽

pp. 691-710 ◽

Cited By ~ 8

Author(s):

C. A. DOMINGUEZ

Keyword(s):

Heavy Quark ◽

Light Quark ◽

Finite Energy ◽

Experimental Information ◽

Spectral Functions ◽

Quark Masses ◽

Quark Sector ◽

Vector Channel ◽

Systematic Uncertainties ◽

Improved Accuracy

Recent progress on QCD sum rule determinations of the light and heavy quark masses is reported. In the light quark sector a major breakthrough has been made recently in connection with the historical systematic uncertainties due to a lack of experimental information on the pseudoscalar resonance spectral functions. It is now possible to suppress this contribution to the 1% level by using suitable integration kernels in Finite Energy QCD sum rules. This allows one to determine the up-, down-, and strange-quark masses with an unprecedented precision of some 8–10%. Further reduction of this uncertainty will be possible with improved accuracy in the strong coupling, now the main source of error. In the heavy quark sector, the availability of experimental data in the vector channel, and the use of suitable multipurpose integration kernels allows one to increase the accuracy of the charm- and bottom-quarks masses to the 1% level.

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Improved meson mass spectrum calculation in the static cavity

Journal of Physics G Nuclear and Particle Physics ◽

10.1088/0954-3899/16/1/006 ◽

1990 ◽

Vol 16 (1) ◽

pp. 31-38 ◽

Cited By ~ 5

Author(s):

L C L Hollenberg ◽

B H J McKellar

Keyword(s):

Mass Spectrum ◽

Meson Mass ◽

Spectrum Calculation ◽

Meson Mass Spectrum

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Meson Spectrum from the Bethe-Salpeter Equation

Australian Journal of Physics ◽

10.1071/p96028 ◽

1997 ◽

Vol 50 (1) ◽

pp. 95 ◽

Cited By ~ 2

Author(s):

C. J. Burden ◽

L. Qian ◽

C. D. Roberts ◽

P. C. Tandy ◽

M. J. Thomson

Keyword(s):

Mass Spectrum ◽

Pseudoscalar Meson ◽

Phenomenological Model ◽

Light Quark ◽

Meson Spectrum ◽

Decay Constants ◽

Model Based ◽

Meson Octet

We present details of a model for calculating the mass spectrum of light-quark mesons and decay constants of the pseudoscalar meson octet from a phenomenological model based on Dyson–Schwinger and Bethe–Salpeter equations. In this model the Bethe-Salpeter kernel is approximated by a separable ansatz obtained from input quark propagators.

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