scholarly journals Calculation of 〈p‖u¯u-d¯d‖p〉 from QCD sum rules and the neutron-proton mass difference

1995 ◽  
Vol 51 (7) ◽  
pp. 3688-3696 ◽  
Author(s):  
Xuemin Jin ◽  
Marina Nielsen ◽  
J. Pasupathy
Keyword(s):  
Sum Rules ◽  
Mass Difference ◽  
Qcd Sum Rules ◽  
Proton Mass

Erratum: QCD sum rules and neutron-proton mass difference

1994 ◽  
Vol 49 (11) ◽  
pp. 6247-6248
Author(s):  
Kwei-Chou Yang ◽  
W-Y. P. Hwang ◽  
E. M. Henley ◽  
L. S. Kisslinger
Keyword(s):  
Sum Rules ◽  
Mass Difference ◽  
Qcd Sum Rules ◽  
Proton Mass

scholarly journals QCD sum rules and neutron-proton mass difference

1993 ◽  
Vol 47 (7) ◽  
pp. 3001-3012 ◽  
Author(s):  
Kwei-Chou Yang ◽  
W- Y. P. Hwang ◽  
E. M. Henley ◽  
L. S. Kisslinger
Keyword(s):  
Sum Rules ◽  
Mass Difference ◽  
Qcd Sum Rules ◽  
Proton Mass

THE ELECTROMAGNETIC MASS DIFFERENCE OF PIONS FROM QCD

1990 ◽  
Vol 05 (04) ◽  
pp. 747-753 ◽  
Author(s):  
M. MARGVELASHVILI
Keyword(s):  
Current Algebra ◽  
Sum Rules ◽  
Mass Difference ◽  
Electromagnetic Mass ◽  
Vacuum Condensate ◽  
Qcd Sum Rules ◽  
Standard Value ◽  
Good Agreement

It is shown that the two point functions of definite class can be calculated, at small spacelike momenta, as subtraction constants in the Borel transformed QCD sum rules. Using the results of current algebra and PCAC, we obtain three different sum rules for determination of the electromagnetic mass difference of pions. The result is in a good agreement with experiment, and confirms the standard value for the four-quark vacuum condensate.

THE CALCULATION OF THE ELECTROMAGNETIC π+−π0 MASS DIFFERENCE WITHIN QCD

1992 ◽  
Vol 07 (26) ◽  
pp. 6523-6535 ◽  
Author(s):  
A.A. PIVOVAROV
Keyword(s):  
Reasonable Agreement ◽  
Sum Rules ◽  
Chiral Limit ◽  
Mass Difference ◽  
Electromagnetic Mass ◽  
Qcd Sum Rules ◽  
K Mesons

The electromagnetic π+−π0 mass difference is calculated with QCD sum rules technique in the chiral limit. The obtained result Δmπ=4.4±1.1 MeV is in reasonable agreement with the experimental value (Δmπ)exp=4.43±0.03 MeV. The developed technique can be also applied to the determination of the electromagnetic mass difference of K mesons.

IN-MEDIUM NEUTRON-PROTON MASS DIFFERENCE WITH NUCLEAR CHIRAL MODELS

1992 ◽  
Vol 01 (04) ◽  
pp. 871-882 ◽  
Author(s):  
G. KREIN ◽  
D. P. MENEZES ◽  
M. NIELSEN
Keyword(s):  
Nuclear Matter ◽  
Degrees Of Freedom ◽  
Sum Rules ◽  
Mass Difference ◽  
Coupling Constants ◽  
Charge Symmetry Breaking ◽  
Charge Symmetry ◽  
Hartree Fock ◽  
Proton Mass ◽  
Quark Models

The neutron-proton mass difference in nuclear matter is calculated within the context of chiral models involving nucleon and meson degrees of freedom. The interplay of chiral symmetry and charge symmetry breaking on neutron and proton self-energies are discussed in a relativistic Hartree–Fock approximation. Exchange terms are crucial to obtain different contributions for the neutron and proton self-energies. Density dependence of meson masses and coupling constants are taken into account. We find that the neutron-proton mass difference in nuclear matter increases as the density increases, contrary to the predictions of several quark models and of QCD sum rules at finite density.

scholarly journals QCD sum rules for parameters of the B -meson distribution amplitudes

2021 ◽  
Vol 104 (1) ◽  
Author(s):  
Muslem Rahimi ◽  
Marcel Wald
Keyword(s):  
B Meson ◽  
Sum Rules ◽  
Qcd Sum Rules

scholarly journals The field strength correlator from QCD sum rules

2000 ◽  
Vol 86 (1-3) ◽  
pp. 421-425 ◽  
Author(s):  
M. Eidemüller ◽  
H.G. Dosch ◽  
M. Jamin
Keyword(s):  
Field Strength ◽  
Sum Rules ◽  
Qcd Sum Rules

scholarly journals The Radiative Δ(1600) → γN Decay in the Light-Cone QCD Sum Rules

Universe ◽  
2021 ◽  
Vol 7 (8) ◽  
pp. 255
Author(s):  
Haifa I. Alrebdi ◽  
Thabit Barakat
Keyword(s):  
Decay Rate ◽  
Light Cone ◽  
Magnetic Dipole Moment ◽  
Sum Rules ◽  
Electric Quadrupole ◽  
The Other ◽  
Electric Quadrupole Moment ◽  
Multipole Moments ◽  
Qcd Sum Rules ◽  
Strongly Agree

Within the framework of the light-cone QCD sum rules method (LCSR’s), the radiative Δ(1600)→γN decay is studied. In particular, the magnetic dipole moment GM1(0) and the electric quadrupole moment GE1(0) are estimated. We also calculate the ratio REM=−GE1(0)GM1(0) and the decay rate. The predicted multipole moments and the decay rate strongly agree with the existing experimental results as well as with the other available phenomenological approaches.

scholarly journals Neutron-Proton Mass Difference in Nuclear Matter and in Finite Nuclei and the Nolen-Schiffer Anomaly

2010 ◽  
Vol 3 ◽  
pp. 06008 ◽  
Author(s):  
U.-G. Meißner ◽  
A.M. Rakhimov ◽  
A. Wirzba ◽  
U.T. Yakhshiev
Keyword(s):  
Nuclear Matter ◽  
Mass Difference ◽  
Proton Mass ◽  
Finite Nuclei
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