In these lectures I would like to describe the roles of explicit pion and quark degrees of freedom in producing unusual states of nuclear matter, concentrating particularly on the possibilities of pion condensation, and formation of quark matter, in the density range from normal nuclear matter ...
Asymmetries in the quark momentum distributions in the proton reveal fundamental aspects of strong interaction physics. Differences between ü and &dline; quarks in the proton sea provide insight into the dynamics of the pion cloud around the nucleon and the nature of chiral symmetry breaking. Polar...
The p/π+ ratio of inclusive proton and pion yields at large pT is calculated within an economical diquark model. The pT and s dependences are in good agreement with recent data from π-p collisions at 200 and 300 GeV beam energies. These data can hardly be understood without a substantia...
respectively, and\Gamma _{ij}are the corresponding two-body Bethe–Salpeter amplitudes, i.e.\Gamma :=\Psi ^{(2)}. The representation Eq. (10) is in some sense a ‘physical basis’ in that it builds
of the bottom quark is quoted for two different models.But in other combinations they contribute different masses.In thepion, an up and an anti-down quark yield a particle of only 139.6 MeV of mass energy, while in therho vector mesonthe same combination of quarks has a mass of 770 MeV...
together using the strong nuclear force to form larger particles calledhadrons. Hadrons come in two main groups:baryonsandmesons. Baryons, such as protons and neutrons, consist of three quarks. Mesons, including the pion and the kaon, are unstable particles consisting of a quark and an anti...
Quarks——介绍夸克的英文资料-推荐下载
Pion decay constant for the Kogut-Susskind quark action in quenched lattice QCD We present a study for the pion decay constant fπ in the quenched approximation to lattice QCD with the Kogut-Susskind (KS) quark action, with the emphasi... Aoki,S.,Fukugita,M.,Hashimoto,S.,... - 《...
A hedgehog shape is assumed for the pion field. A soluble model is presented and compared to a self-consistent calculation. The results are discussed in the light of the possible effective baryon number carried by the chiral fields.DOI: 10.1016/0375-9474(84)90306-3 被引量: 232 ...
A prominent feature of strong interaction is “colour confinement”, the phenomenon preventing the isolation and direct observation of free colour charges, i.e. of unbound quarks and gluons, in conditions of temperature and energy density typical of ordinary matter. However, particle accelerators ...