Proton-helium elastic scattering: a possible high-energy polarimeter at RHIC-BNL
Abstract We examine a suggestion to use p- 4 He elastic scattering, as an absolute polarimeter for high-energy polarized proton beams, by means of a Coulomb-Nuclear Interference effect for the single-spin asymmetry A N ( t ), around the diffractive minimum of the differential cross section |t|∼0.21 GeV 2 . Although this reaction has a fairly simple dynamical structure, our theoretical uncertainties and the present experimental inaccuracy of the differential cross section in this t region, allows one to generate dramatic effects for A N ( t ), which will be discussed.
THE QCD ANALYSIS OF THE COMBINED SET FOR THE F 3 STRUCTURE FUNCTION DATA BASED ON THE ANALYTIC APPROACH
We apply analytic perturbation theory (APT) to the QCD analysis of the xF3(x, Q2) structure function considering a combined set of deep inelastic scattering data presented by several collaborations, and extract values of the scale parameter ΛQCD, the parameters of the form of the xF3 structure function, and the x-shape of the higher twist (HT) contribution. We study the difference between the results obtained within the standard perturbative and analytic approaches in comparison with the experimental errors and state that the greatest difference occurs for large x.
Self-responsibility in health care/promotion: motivational factors.
This paper explores motivational factors at play in self-responsibility in health care and promotion. If people do not take responsibility for their health status, is it because they can not or will not? "Can" refers to the ability or skill to do something, while "will" refers to intention and effort. Each of these factors are analyzed in terms of their role as a cause of behavior in self-responsibility for the health status. Educational intervention to motivate self-responsibility is suggested as well as empirical research in how people attribute health outcomes.