The static force in background perturbation theory

The static force $F_B(r)$ and the strong coupling $\alpha_F(r)$, which defines the gluon-exchange part of $F_B(r)$, are studied in QCD background perturbation theory (BPT). In the region r\la 0.6 fm $\alpha_F(r)$ turns out to be essentially smaller than the coupling $\alpha_B(r)$ in the static potential. For the dimensionless function $\Phi_B(r) = r^2 F_B(r)$ the characteristic values $\Phi_B(r_1) =1.0$ and $\Phi_B(r_0)=1.65$ are shown to be reached at the following $Q\bar Q$ separations: $r_1\sqrt{\sigma} =0.77, r_0\sqrt{\sigma} =1.09$ in quenched approximation and $r_1\sqrt{\sigma}=0.72, r_0\sqrt{\sigma}=1.04$ for $n_f =3$. The numbers obtained appear to be by only 8% smaller than those calculated in lattice QCD while the values of the couplings $\alpha_F(r_1)$ and $\alpha_F(r_0)$ in BPT are by $\sim 30$ and $50$ larger than corresponding lattice couplings. With the use of the BPT potential good description of the bottomonium spectrum is obtained.Comment: 21 pages, 1 figure. To be publised in Phys. Atom. Nucl. dedicated to the 70-th birthday of Yu.A. Simono

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Not AvailableTwelve Japanese cultivars and JS335, the most popular soybean cultivar in India, weregrown in the field. Days to arrival of R6 stage (when pods are still green, immature, andtight with fully developed immature green seeds) of these cultivars were recorded. Podspicked at this stage were evaluated for pod yield per plant, pod characteristics (width,presence of hairs) fresh green seed weight and percent moisture content. Fresh green seedswere analyzed for compositional traits viz. protein content, trypsin inhibitor lipoxygenaseisozymes, oil content, and polyunsaturated fatty acids (essential fatty acids). Japanese culti-vars showed higher fresh green seed weight and pod yield than JS335. On a fresh weightbasis, Japanese cultivars exhibited lower protein content but higher oil content than JS335.Most of the Japanese cultivars showed lower trypsin inhibitor content and a varying level oflipoxygenase-I, as well as lipoxygenase-II + III when compared to JS335. Total polyunsat-urated fatty acids content in JS335 was higher than some of the Japanese cultivars. Thenumber of pods per plant showed a positive correlation (r = 0.863, p < 0.001) with pod yieldper plant. Some of the Japanese cultivars offer great potential for consumption at the greenpod stage or as a source for desirable traits.Not Availabl

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