The starting point in both classical and new superconducting materials is the electronic structure that determines the metallic properties in the normal phase (that is, that above Tc). In this respect, the classical superconductors are well described by band theory and, in some cases, starting fro...
Nevertheless, because it represents the contribution of the channel wave function to the total normalization, the compositeness X˜ i will have an important piece of information on the structure of the resonance. More- over, in Ref. [63], it was claimed that one can formulate a meaningful ...
The interaction of quarks and gluons is described by Quantum Chromodynamics [1,2,3,4], a renormalisable gauge theory associated to the color gauge group SU(3). Of its correlation functions, the quark-gluon vertex has a fundamental role in hadron phenomenology, in the understanding of chiral ...
of the pion and nucleon form factors F[sub π](q²), G[sub m](q²), and F²(q²) at positive values of q² and those at negative values of this variable are associated with the analytic properties of the double-logarithmic term in the exponent of the Sudakov form factor. ...
Measurements of the flavor asymmetry of the polarized antiquark distributions in the nucleon, Deltau(x)-Deltad(x), would provide a unique opportunity to discriminate between different models of the role of the chiral structure of the nuc... B Dressler,K Goeke,MV Polyakov,... 被引量: 0发表...
(6900) structure in the J/ψJ/ψmass spectrum26belongs to both categories simultaneously. Its proximity to theχc0χc1threshold could indicate a molecular structure27,28. Alternatively, it could be a compact object, where all four quarks are within one confinement volume and each quark interacts...
Group Structure is SU(3) ? For every quark there is an anti-quark ? The anti-quark has opposite charge, baryon number and strangeness ? Quarks feel all interactions (have mass, electric charge, etc) 8 Early 1960’s Quarks Successes of 1960’s Quark Model: ? Classify all known (in the...
show a similar but less pronounced structure that is inconsistent with the proton and K∗0 data. Otherwise UCLA reproduces the data except for pseudoscalar kaons in the range 0.15 < xp < 0.03. Fig. 2 shows the ratios of production in b-flavor to light flavor events for the seven specie...
values of the pion and nucleon form factors F 蟺 ( q 2 ), G m ( q 2 ), and F 2 ( q 2 ) at positive values of q 2 and those at negative values of this variable are associated with the analytic properties of the double-logarithmic term in the exponent of the Sudakov form ...
A schematic illustration of the exclusive quarkonium electroproduction process,, in the dipole picture. On the left panel, the structure of the amplitude and kinematic variables in impact parameter space are depicted while its amplitude squared for theelectroproduction is shown on the right panel ...