3,112 research outputs found
Searching for flavor dependence in nuclear quark behavior
The observed correlation between the EMC effect and the contribution of
short-range correlations (SRCs) in nuclei suggests that the modification of the
quark distributions of bound protons and neutrons might occur within SRCs. This
raises the possibility that the EMC effect may have an isospin dependence
arising from the np dominance of SRCs. We discuss previous attempts to test
this possibility and perform a new analysis of existing data. We find no
experimental support for the observation of an isospin dependence of the EMC
effect.Comment: 5 pages, 4 figures, submitted for publicatio
Scaling of the F_2 Structure Function in Nuclei and Quark Distributions at x > 1
We present new data on electron scattering from a range of nuclei taken in Hall C at Jefferson Lab. For heavy nuclei, we observe a rapid falloff in the cross section for x > 1, which is sensitive to short-range contributions to the nuclear wave function, and in deep inelastic scattering corresponds to probing extremely high momentum quarks. This result agrees with higher energy muon scattering measurements, but is in sharp contrast to neutrino scattering measurements which suggested a dramatic enhancement in the distribution of the “superfast” quarks probed at x > 1. The falloff at x > 1 is noticeably stronger in ^2H and ^3He, but nearly identical for all heavier nuclei
Complex Phase Behavior of The System of Particles with Smooth Potential with Repulsive Shoulder and Attractive Well
We report a detailed simulation study of the phase behavior of core softened
system with attractive well. Different repulsive shoulder widthes and
attractive well depthes are considered which allows to monitor the influence of
repulsive and attractive forces on the phase diagram of the system.
Thermodynamic anomalies in the systems are also studied. It is shown that the
diffusion anomaly is stabilized by small attraction.Comment: 11 pages, 13 figure
- …