We compute the three-loop corrections to quark axial vector form factor in massless QCD, focusing on pure-singlet contributions where current couples a closed loop. Employing Larin prescription for γ5, we discuss UV renormalization of factor. The infrared singularity structure resulting singlet axial-vector is explained from factorization, defining finite remainder function.

We ask whether prime-age adult mortality due to HIV/AIDS decreases the endowment of knowledge for agricultural production in Kagera, Tanzania, reducing total factor productivity. We also quantify how much this negative effect contributes to the decrease in long-term household agricultural income growth compared to the contribution of decreased accumulation of productive assets; household member...

to study the effect of sowing date and supplemental irrigation on grain yield and distribution and remobilization of phosphorus in canola (brassica napus), this experiment was carried out in 2 years (2005-07) in research station of gonbad. the study was carried out in two types of irrigation treatments (rainfed, supplemental). both experiments were carried out in randomized complete block desig...