Results 111 to 120 of about 94,440 (338)

A holographic study of the gauged NJL model

Physics Letters B, 2017
The Nambu Jona-Lasinio model of chiral symmetry breaking predicts a second order chiral phase transition. If the fermions in addition have non-abelian gauge interactions then the transition is expected to become a crossover as the NJL term enhances the ...
Will Clemens, Nick Evans
doaj  

Chiral Symmetry Breaking by Instantons

, 1995
This is a review of the QCD instanton vacuum. After introducing instantons and their physical meaning, I show that the number of instantons in the vacuum fluctuates in accordance with the QCD trace anomaly. The main properties of the instanton ensemble are given.
openaire   +3 more sources

Gluon Condensates, Chiral Symmetry Breaking and Pion Wave Function

, 1992
We consider here chiral symmetry breaking in quantum chromodynamics arising from gluon condensates in vacuum. Through coherent states of gluons simulating a mean field type of approximation, we show that the off-shell gluon condensates of vacuum generate
A. Mishra, A. Mishra, A. Mishra, A. Youanc Le, D. Schutte, E.S. Abers, G.K. Savvidy, H. Mishra, J. Schwinger, K.G. Wilson, L. Maharana, M. Creutz, M.A. Shifman, N. Gribov, P.K. Panda, R. Royen Van, S. P. Misra, S.P. Misra, S.P. Misra, S.P. Misra, S.P. Misra, S.P. Misra, S.P. Misra, S.P. Misra, S.R. Amendolia, Y. Nambu   +25 more
core   +1 more source

Unraveling the Complexity of the Dzyaloshinskii–Moriya Interaction in Layered Magnets: The Full Magnitude and Chirality Control

Advanced Materials, EarlyView.
In layered magnets, the atomistic Dzyaloshinskii–Moriya interaction (DMI) depends critically not only on the orbital occupancy of the interface layer but also on the sequence of the atomic layers. The effect can be understood by analyzing the contributions of different orbitals to DMI.
Khalil Zakeri, Albrecht von Faber, Sergiy Mankovsky, Hubert Ebert   +3 more
wiley   +1 more source

Low-energy effective field theory below the electroweak scale: one-loop renormalization in the ’t Hooft-Veltman scheme

Journal of High Energy Physics
The low-energy effective field theory below the electroweak scale (LEFT) describes the effects at low energies of both the weak interaction and physics beyond the Standard Model.
Luca Naterop, Peter Stoffer
doaj   +1 more source

Foundations of the Constituent Quark Model

, 1996
'Constituent quarks' means massive quarks, in contrast to the nearly massless u,d,s quarks of the QCD lagrangian. The dynamical or constituent masses appear owing to the spontaneous chiral symmetry breaking in QCD.
Diakonov, Dmitri
core   +2 more sources

Topology in Biological Piezoelectric Materials

Advanced Materials, EarlyView.
This review summarizes the topological structures in biological piezoelectric materials, covering morphology evolution, spatial arrangement, and biomimetic strategies. These topologies modulate structure‐property relationships across multiple scales, enabling performance enhancement and multifunctional integration.
Chen Chen, Yanhu Zhang, Yi Zheng, Yi Zhang, Hongyi Liu, Jiang Wu, Liang Yang, Zhengbao Yang   +7 more
wiley   +1 more source

QCD chiral symmetry restoration with a large number of quarks in a model with a confining propagator and dynamically massive gluons

Physics Letters B, 2015
Considering a QCD chiral symmetry breaking model where the gap equation contains an effective confining propagator and a dressed gluon propagator with a dynamically generated mass, we verify that the chiral symmetry is restored for a large number of ...
R.M. Capdevilla, A. Doff, A.A. Natale
doaj  

Scars in Dirac fermion systems: the influence of an Aharonov–Bohm flux

New Journal of Physics, 2017
Time-reversal ( ${ \mathcal T }$ -) symmetry is fundamental to many physical processes. Typically, ${ \mathcal T }$ -breaking for microscopic processes requires the presence of magnetic field.
Cheng-Zhen Wang, Liang Huang, Kai Chang
doaj   +1 more source

Spontaneous chiral symmetry breaking in early molecular networks

Biology Direct, 2010
Background An important facet of early biological evolution is the selection of chiral enantiomers for molecules such as amino acids and sugars. The origin of this symmetry breaking is a long-standing question in molecular evolution.
Markovitch Omer, Kafri Ran, Lancet Doron
doaj   +1 more source