scholarly journals Determination of the m_u and m_d quark masses from eta\rightarrow 3pi decay

2012 ◽  
Author(s):  
Martin Zdrahal
Keyword(s):  
Quark Masses

scholarly journals DETERMINATION OF LIGHT QUARK MASSES IN QCD

2010 ◽  
Vol 25 (29) ◽  
pp. 5223-5234 ◽  
Author(s):  
C. A. DOMINGUEZ
Keyword(s):  
Strange Quark ◽  
Sum Rules ◽  
Standard Procedure ◽  
Light Quark ◽  
Qcd Sum Rules ◽  
Quark Masses ◽  
Systematic Uncertainties ◽  
Better Than ◽  
The Ideal

The standard procedure to determine (analytically) the values of the quark masses is to relate QCD two-point functions to experimental data in the framework of QCD sum rules. In the case of the light quark sector, the ideal Green function is the pseudoscalar correlator which involves the quark masses as an overall multiplicative factor. For the past thirty years this method has been affected by systematic uncertainties originating in the hadronic resonance sector, thus limiting the accuracy of the results. Recently, a major breakthrough has been made allowing for a considerable reduction of these systematic uncertainties and leading to light quark masses accurate to better than 8%. This procedure will be described in this talk for the up-, down-, strange-quark masses, after a general introduction to the method of QCD sum rules.

scholarly journals Determination of quark masses from nf=4 lattice QCD and the RI-SMOM intermediate scheme

2018 ◽  
Vol 98 (1) ◽  
Author(s):  
A. T. Lytle ◽  
C. T. H. Davies ◽  
D. Hatton ◽  
G. P. Lepage ◽  
C. Sturm ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Quark Masses

PRECISE HEAVY QUARK MASSES

2013 ◽  
Vol 28 (26) ◽  
pp. 1360019 ◽  
Author(s):  
JOHANN H. KÜHN
Keyword(s):  
Heavy Quark ◽  
Critical Analysis ◽  
Bottom Quark ◽  
Fundamental Parameters ◽  
Quark Masses

Recent theoretical and experimental improvements in the determination of charmed- and bottom-quark masses are discussed. The final results, mc(3 GeV ) = 986(13) MeV and mb(mb) = 4163(16) MeV , are among the most precise determinations of these two fundamental parameters. A critical analysis of the theoretical and experimental uncertainties is presented and possibilities for further improvements of the experimental input are discussed.

scholarly journals Non-perturbative determination of improvement coefficients $$b_\mathrm{m}$$ and $$b_\mathrm{A}-b_\mathrm{P}$$ and normalisation factor $$Z_\mathrm{m}Z_\mathrm{P}/Z_\mathrm{A}$$ with $$N_\mathrm{f}= 3$$ Wilson fermions

2019 ◽  
Vol 79 (9) ◽  
Author(s):  
Giulia Maria de Divitiis ◽  
Patrick Fritzsch ◽  
Jochen Heitger ◽  
Carl Christian Köster ◽  
Simon Kuberski ◽  
...  
Keyword(s):  
Large Volume ◽  
Quark Mass ◽  
Gauge Coupling ◽  
Perturbative Calculation ◽  
Quark Masses ◽  
Functional Scheme ◽  
Normalisation Factor ◽  
Mass Renormalisation ◽  
Wilson Fermions

Abstract We determine non-perturbatively the normalisation parameter $$Z_\mathrm{m}Z_\mathrm{P}/Z_\mathrm{A}$$ZmZP/ZA as well as the Symanzik coefficients $$b_\mathrm{m}$$bm and $$b_\mathrm{A}-b_\mathrm{P}$$bA-bP, required in $$\mathrm{O}(a)$$O(a) improved quark mass renormalisation with Wilson fermions. The strategy underlying their computation involves simulations in $$N_\mathrm{f}=3$$Nf=3 QCD with $$\mathrm{O}(a)$$O(a) improved massless sea and non-degenerate valence quarks in the finite-volume Schrödinger functional scheme. Our results, which cover the typical gauge coupling range of large-volume $$N_\mathrm{f}=2+1$$Nf=2+1 QCD simulations with Wilson fermions at lattice spacings below $$0.1\,\mathrm{fm}$$0.1fm, are of particular use for the non-perturbative calculation of $$\mathrm{O}(a)$$O(a) improved renormalised quark masses.

scholarly journals PHASE DIAGRAM OF THE STRONG INTERACTION SYSTEM FROM LATTICE QCD

2011 ◽  
Vol 01 ◽  
pp. 28-33
Author(s):  
SEYONG KIM
Keyword(s):  
Phase Diagram ◽  
Thermodynamic Properties ◽  
Lattice Qcd ◽  
Strong Interaction ◽  
Accurate Determination ◽  
Baryon Density ◽  
Quark Masses ◽  
Interaction System ◽  
Sign Problem

We briefly review recent progresses in studying QCD thermodynamics from lattice QCD. Investigation of QCD in zero baryon density shows a rapid cross-over with realistic (u, d, s) quark masses. Various improvements of lattice QCD action leads to more accurate determination of QCD thermodynamic properties. Although simulating QCD in non-zero baryon density is difficult due to "sign problem", steady progress is also achieved.

scholarly journals Lattice determination of light quark masses

2000 ◽  
Vol 62 (5) ◽  
Author(s):  
M. Göckeler ◽  
R. Horsley ◽  
H. Oelrich ◽  
D. Petters ◽  
D. Pleiter ◽  
...  
Keyword(s):  
Light Quark ◽  
Quark Masses

Dynamical chiral-symmetry breaking and determination of the quark masses

1988 ◽  
Vol 38 (1) ◽  
pp. 238-278 ◽  
Author(s):  
A. Barducci ◽  
R. Casalbuoni ◽  
S. De Curtis ◽  
D. Dominici ◽  
R. Gatto
Keyword(s):  
Symmetry Breaking ◽  
Chiral Symmetry ◽  
Chiral Symmetry Breaking ◽  
Dynamical Chiral Symmetry Breaking ◽  
Quark Masses

scholarly journals Recent highlights with baryons from lattice QCD

2020 ◽  
Vol 241 ◽  
pp. 02004
Author(s):  
Colin Morningstar
Keyword(s):  
Lattice Qcd ◽  
Percent Level ◽  
Form Factors ◽  
Distribution Functions ◽  
Electromagnetic Form Factors ◽  
Parton Distribution Functions ◽  
Quark Masses ◽  
Proton Mass ◽  
Key Points

Highlights from recent computations in lattice QCD involving baryons are presented. Calcula tions of the proton mass and spin decompositions are discussed, a percent level determination of the nucleon axial coupling is described, and determinations of the proton and neutron electromagnetic form factors and light-cone parton distribution functions are outlined. Recent results applying the so-called Luscher method to meson-baryon systems are presented. Key points emphasized are that much better precision with disconnected diagrams is being achieved, incorporating multi-hadron operators is now feasible, and more and more studies are being done with physical quark masses.

Sign in / Sign up

Export Citation Format

Share Document