Does particle decay cause wave function collapse: An experimental test

We describe an experimental test of whether particle decay causes wave function collapse. The test uses interference between two well separated, but coherent, sources of vector mesons. The short-lived mesons decay before their wave functions can overlap, so any interference must involve identical final states. Unlike previous tests of nonlocality, the interference involves continuous variables, momentum and position. Interference can only occur if the wave function retains amplitudes for all possible decays. The interference can be studied through the transverse momentum spectrum of the reconstructed mesons.Comment: Slightly revised version, to appear in Phys. Lett. A. 11 pgs., including 2 figure

Fertility desires and condom use among HIV-positive women at an antiretroviral roll-out program in Zimbabwe

As access to anti-retroviral therapy (ART) increases in sub-Saharan Africa, fertility and contraception patterns are likely to change. Two hundred  HIV-positive women at an ART roll-out site in Zimbabwe responded to a questionnaire on fertility desires and condom use. Ten women (5%) reported planning a pregnancy in the next year, comprising 0% of women not yet eligible for ART, 8.22% of women on the waitlist for ART, and 4.17% of women on ART. Younger age, fewer living children, and higher quality of life were individually associated with intended pregnancy in the next year; however in multivariate analysis only the association with higher quality of life remained significant. Reported ever use of condoms was relatively low (46.5%) and condom use varied by neither ART status nor by fertility desires. In conclusion, our data demonstrates fertility desires among HIV-positive women in Zimbabwe correlate with higher perceived quality of life (Afr. J. Reprod. Health 2010; 14[2]: 27-35)