Results 91 to 100 of about 21,261,020 (311)

Dynamically generated magnetic moment in the Wigner-function formalism

open access: yesPhysics Letters B, 2019
We study how the mass and magnetic moment of the quarks are dynamically generated in nonequilibrium quark matter. We derive the equal-time transport and constraint equations for the quark Wigner function in a magnetized quark model and solve them in the ...
Shijun Mao, Dirk H. Rischke
doaj   +1 more source

Nucleon structure in a light-front quark model consistent with quark counting rules and data [PDF]

open access: yes, 2014
Using global fits of valence u and d quark parton distributions and data on quark and nucleon form factors in the Euclidean region, we derive a light-front quark model for the nucleon structure consistent with quark counting rules.
T. Gutsche   +3 more
semanticscholar   +1 more source

Nuclear Physics in the Era of Quantum Computing and Quantum Machine Learning

open access: yesAdvanced Quantum Technologies, EarlyView.
The use of QML in the realm of nuclear physics at low energy is almost nonexistent. Three examples of the use of quantum computing and quantum machine in nuclear physics are presented: the determination of the phase/shape in nuclear models, the calculation of the ground state energy, and the identification of particles in nuclear physics experiments ...
José‐Enrique García‐Ramos   +4 more
wiley   +1 more source

Quark Models and Quark Phenomenology

open access: yes, 1997
Invited Talk at Third Symposium on the History of Particle Physics, 20 ...
openaire   +3 more sources

The Quark Spin Distributions of the Nucleon

open access: yes, 1998
The quark helicity measured in polarized deep inelastic scattering is different from the quark spin in the rest frame of the nucleon. We point out that the quark spin distributions $\Delta q_{RF}(x)$ are connected with the quark helicity distributions ...
Aoki   +11 more
core   +2 more sources

Consistency of the light-front quark model with chiral symmetry in the pseudoscalar meson analysis [PDF]

open access: yes, 2014
We discuss the link between the chiral symmetry of QCD and the numerical results of the light-front quark model (LFQM), analyzing both the two-point and three-point functions of a pseudoscalar meson from the perspective of the vacuum fluctuation ...
H. Choi, C. Ji
semanticscholar   +1 more source

Impact of Semaglutide on fat mass, lean mass and muscle function in patients with obesity: The SEMALEAN study

open access: yesDiabetes, Obesity and Metabolism, EarlyView.
Abstract Aims Semaglutide, a GLP‐1 receptor agonist, has shown efficacy in promoting weight loss. However, limited data exist on its impact on lean mass, muscle function, and metabolic adaptations. The SEMALEAN study aims to evaluate these parameters in patients with obesity treated with Semaglutide (2.4 mg).
Mathieu Alissou   +18 more
wiley   +1 more source

Understanding pentaquarks with various quark models [PDF]

open access: yesPhysics Letters B, 2004
The pentaquark state recently discovered has been studied with three quark models which either fit the nucleon spin structure or the $NN$ scattering. A minimum $ ^+$ mass of 1620 MeV is obtained both for the ${1/2}^\pm$ state. The mixing of various color structure configurations, which would reduce the mass of the penta-quark state, should be taking ...
Di Qing   +6 more
openaire   +2 more sources

The Quark Orbital Angular Momentum in a Light-Cone Representation

open access: yes, 1998
We perform an analysis of the quark angular momentum in a light-cone representation by taking into account the effect due to the Melosh-Wigner rotation and find that there is a relativistic correction factor connecting the quark orbital angular momentum ...
Ma, Bo-Qiang, Schmidt, Ivan
core   +2 more sources

Search for single production of vector-like quarks decaying into Wb in pp collisions at s $$ \sqrt{s} $$ = 13 TeV with the ATLAS detector

open access: yesJournal of High Energy Physics, 2019
A search for singly produced vector-like quarks Q, where Q can be either a T quark with charge +2/3 or a Y quark with charge −4/3, is performed in proton–proton collision data at a centre-of-mass energy of 13 TeV corresponding to an integrated luminosity
The ATLAS collaboration   +2932 more
doaj   +1 more source

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