ON THE Σ0→Λ0 TRANSITION MAGNETIC MOMENT IN THE EFFECTIVE QUARK MODEL WITH CHIRAL SYMMETRY

2007 ◽  
Vol 22 (30) ◽  
pp. 2265-2272 ◽  
Author(s):  
A. YA. BERDNIKOV ◽  
YA. A. BERDNIKOV ◽  
A. N. IVANOV ◽  
V. A. IVANOVA ◽  
A. V. NIKITCHENKO ◽  
...  
Keyword(s):  
Quark Model ◽  
Chiral Symmetry ◽  
Magnetic Moment ◽  
Sum Rules ◽  
Quark Condensate ◽  
Spontaneous Breaking ◽  
Dominant Contribution ◽  
Transition Magnetic Moment ◽  
Nuclear Magneton

We calculate the Σ0→Λ0 transition magnetic moment μΣ0Λ0 in the effective quark model with chiral U (3) × U (3) symmetry.5 We find that the dominant contribution is proportional to the quark condensate that indicates the important role of spontaneous breaking of chiral symmetry for its formation. Our result μΣ0Λ0 = -1.62 μN, where μN is a nuclear magneton, agrees well with the experimental data [Formula: see text]. It also agrees well both quantitatively and qualitatively with the result, obtained in the QCD sum rules approach |μΣ0Λ0| = (1.60±0.30)μN,3 where the dominant contribution is proportional to the quark condensate as well.

scholarly journals The Σ0Λ transition magnetic moment in light cone QCD sum rules

2001 ◽  
Vol 516 (3-4) ◽  
pp. 299-306 ◽  
Author(s):  
T.M. Aliev ◽  
A. Özpineci ◽  
M. Savcı
Keyword(s):  
Magnetic Moment ◽  
Light Cone ◽  
Sum Rules ◽  
Qcd Sum Rules ◽  
Transition Magnetic Moment

CHIRAL SYMMETRY BREAKING AND THE GLUON CONDENSATE

1993 ◽  
Vol 08 (04) ◽  
pp. 335-339
Author(s):  
M. FABER ◽  
A.N. IVANOV ◽  
M. NAGY ◽  
N.I. TROITSKAYA
Keyword(s):  
Magnetic Field ◽  
Symmetry Breaking ◽  
Chiral Symmetry ◽  
Sum Rules ◽  
Chiral Symmetry Breaking ◽  
Gluon Condensate ◽  
Quark Condensate ◽  
Low Energy ◽  
Qcd Sum Rules ◽  
Energy Approximation

For the low-energy approximation of QCD, the extended Nambu-Jona-Lasinio model has been used. Quarks interact with an external homogeneous color-magnetic field, simulating the contribution of the gluon condensate. The value of the gluon condensate, needed to reach the correct value of the quark condensate, is determined and agrees well with the value obtained from QCD sum rules.

scholarly journals On the Neutron Transition Magnetic Moment

Physics ◽  
2019 ◽  
Vol 1 (2) ◽  
pp. 271-289 ◽  
Author(s):  
Zurab Berezhiani ◽  
Riccardo Biondi ◽  
Yuri Kamyshkov ◽  
Louis Varriano
Keyword(s):  
Magnetic Field ◽  
Magnetic Moment ◽  
Potential Role ◽  
Magnetic Moments ◽  
Lifetime Measurement ◽  
Neutron Lifetime ◽  
Transition Magnetic Moment ◽  
Average Probability ◽  
The Magnetic Field

We discuss the possibility of the transition magnetic moments (TMM) between the neutron n and its hypothetical sterile twin “mirror neutron” n′ from a parallel particle “mirror” sector. The neutron can be spontaneously converted into mirror neutron via the TMM (in addition to the more conventional transformation channel due to n−n′ mass mixing) interacting with the magnetic field B as well as with mirror magnetic field B′. We derive analytic formulae for the average probability of n−n′ conversion and consider possible experimental manifestations of neutron TMM effects. In particular, we discuss the potential role of these effects in the neutron lifetime measurement experiments leading to new, testable predictions.

scholarly journals EFFECTIVE $\bar KN$ INTERACTION AND ROLE OF CHIRAL SYMMETRY

2010 ◽  
Vol 19 (12) ◽  
pp. 2612-2617 ◽  
Author(s):  
Tetsuo Hyodo ◽  
Wolfram Weise
Keyword(s):  
Chiral Symmetry ◽  
Effective Potential ◽  
Single Channel ◽  
Kaonic Nuclei

We study the consequence of chiral SU(3) symmetry in the kaon-nucleon phenomenology, by deriving the effective single-channel [Formula: see text] potential. It turns out that the πΣ interaction is strongly attractive and plays an important role for the structure of the Λ(1405) resonance. We discuss the implication of effective potential for the few-body kaonic nuclei.

Quark Clustering and Chiral Symmetry Breaking in Nuclear Matter

2003 ◽  
Vol 18 (32) ◽  
pp. 2255-2264 ◽  
Author(s):  
O. A. Battistel ◽  
G. Krein
Keyword(s):  
Symmetry Breaking ◽  
Neutron Stars ◽  
Nuclear Matter ◽  
Chiral Symmetry ◽  
Quark Matter ◽  
Traditional Approach ◽  
Chiral Symmetry Breaking ◽  
Quark Condensate ◽  
Baryon Density ◽  
Hadronic Matter

Chiral symmetry breaking at finite baryon density is usually discussed in the context of quark matter, i.e. a system of deconfined quarks. Many systems like stable nuclei and neutron stars however have quarks confined within nucleons. In this paper we construct a Fermi sea of three-quark nucleon clusters and investigate the change of the quark condensate as a function of baryon density. We study the effect of quark clustering on the in-medium quark condensate and compare results with the traditional approach of modeling hadronic matter in terms of a Fermi sea of deconfined quarks.

scholarly journals The strangeness magnetic moment of the proton in the chiral quark model

2000 ◽  
Vol 665 (3-4) ◽  
pp. 353-364 ◽  
Author(s):  
L. Hannelius ◽  
D.O. Riska ◽  
L.Ya. Glozman
Keyword(s):  
Quark Model ◽  
Magnetic Moment ◽  
Chiral Quark Model
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