Define down quark. down quark synonyms, down quark pronunciation, down quark translation, English dictionary definition of down quark. n. Abbr. d The flavor of quark that has a charge of - 1/3 and a mass about 10 times that of an electron, belongs to the
After calculating the composition, we find that the channel of \Sigma _{c}\pi is the main component with the proportion of 90.0%, while the channel of ND and the rest channels are the minor components, accounting for 8.1% and 1.9%, respectively. From Fig. 2 we can see that the ...
ratio of the deep inelastic electron-neutron to electron-proton structure functions approaches 14 for ω∼1 are shown to imply in parton models that there is a class of exclusive processes which have a faster fall-off in s at fixed centre of mass angle than that given by dimensional ...
We show that a detailed treatment of the equilibrium composition of a quark liquid is crucial to the structure evaluation of its neutrino emissivity. We demonstrate that when massive s-quarks are present in cold quark matter, the electron fraction Y/sub e/ vanishes above a finite baryon density...
The latter transition may be induced by a relatively small change in compound composition (cf. the behavior of La2 − xSrxO4 or YBa2Cu3O7 − x as a function of x). It is quite interesting to note that oxides such as YBa2Cu3O7 − x may be synthesized in either insulating (x ...
The chemical composition of the hot and dense parton matter formed in the central region of ultrarelativistic heavy-ion collisions is studied for the case ... K Geiger,JI Kapusta - 《Physical Review D Particles & Fields》 被引量: 260发表: 1993年 Parton transport and hadronization from the dy...
quarks are not massive at all, last models predict that the up quark mass is just about 4 fold that of the electrons, as its charge is 2/3, we just should see circular track similar to that of positron with a radius about 6 fold larger the electron as bei...
Each of these modifications of the composition of the compact star takes place as a deflagration and not as a detonation, so the energy released in the transition goes mainly into heat and not into a mechanical wave. This is important in order to avoid an excessive baryonic contamination of ...
In doing so we assume mass composition following from the diffusion notions of cosmic ray propagation through the Galaxy. Some general problems of EAS simulation and among them the simulation of electron-photon cascades are also discussed. 展开 ...
Bound State of Heavy Quarks Using a General Polynomial Potential Researchers associated with the Continuous Electron Beam Accelerator Facility (CEBAF) at the Department of Energy's Thomas Jefferson National Accelerator Facility have taken the first step toward solving the problem of "quark confinement."...