Results 91 to 100 of about 1,219,015 (217)

QUARK AND GLUON CONDENSATES IN THE QUARK–MESON COUPLING MODEL [PDF]

open access: yesModern Physics Letters A, 1998
Using the quark–meson coupling (QMC) model, we study the density dependence of the quark and gluon condensates in nuclear matter. We show that the change of the quark condensate is mainly driven by the scalar field in the medium and that the reduction of the quark condensate is suppressed at high density, even in the mean-field approximation.
Saito, K., Tsushima, K., Thomas, A.
openaire   +4 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

Extended Quark Potential Model from Random Phase Approximation

open access: yes, 2002
The quark potential model is extended to include the sea quark excitation using the random phase approximation (RPA). The effective quark interaction preserves the important Quantum Chromodynamics (QCD) properties -- chiral symmetry and confinement ...
Chen, Xiaolin   +3 more
core   +1 more source

Purpose and Providence in Evolutionary Perspective: Considerations for Theological Anthropology in Light of Biocultural Evolution and Genetic Engineering

open access: yesThe Heythrop Journal, EarlyView.
Abstract We argue here that bringing insights from evolution and bioengineering to bear on traditional accounts of divine providence helps to illustrate just how complex providence is and how difficult it is to achieve. While other non‐human animals might exhibit greater agency in creation and its evolutionary development than has traditionally been ...
Michael Burdett, Andrew Jackson
wiley   +1 more source

RELATIVISTIC QUARK MODEL

open access: yesFizika B : a journal of experimental and theoretical physics, 1999
A general Lorentz-covariant quark model of mesons, whose nonrelativistic limit corresponds to Isgur-Scora-Grinstein-Wise model, is constructed. It possesses the heavy quark symmetry and can be easily applied to calculation of form factors. Besides it can be engaged in novel tasks, such a the investigation of the two photon decay of scalar mesons.
Horvatić, D., Tadić, D., Žganec, S.
openaire   +4 more sources

The dual quark models

open access: yes, 2012
We briefly recall the historical environment around our 1971 and 1975 constructions of current-algebraic internal symmetry on the open string. These constructions included the introduction of world sheet fermions, the independent discovery of affine Lie algebra in physics (level one of affine su(3)), the first examples of the affine-Sugawara and coset ...
Martin B. Halpern, Korkut Bardakci
openaire   +3 more sources

Quark model: recent issues [PDF]

open access: yes, 2007
In the first part I briefly survey recent issues in constituent quark models raised by the observation of unusual hadronic states. In particular I discuss the role of higher Fock components in the wave function of baryons and the possible interpretation ...
Stancu, Fl.
core  

An Interview With Peter Rousseeuw

open access: yesInternational Statistical Review, EarlyView.
Summary Peter J. Rousseeuw is a statistician known mainly for his work on robust statistics and cluster analysis. Among his creations are least trimmed squares regression, the minimum covariance determinant estimator, the partitioning around medoids clustering method and the silhouettes graphical display.
Mia Hubert
wiley   +1 more source

Gluon spin in a quark model [PDF]

open access: yesPhysics Letters B, 1998
8 pages, no figures, 1 ...
V. Barone, T. Calarco, DRAGO, Alessandro
openaire   +4 more sources

Harmonic quarks: properties and some applications [PDF]

open access: yesarXiv, 2003
In this work the investigation of hadronic structures with the help of the harmonic quarks is prolonged. The harmonic quark model is good at describing the meson structures and the baryon excitations to resonances, in particular delta(1232). Harmonic quark reactions form the structure of the baryon resonances.
arxiv  

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