RESUMO
A long-standing discrepancy between the bottom-quark production cross section and predictions of perturbative quantum chromodynamics is addressed. We show that pair production of light gluinos, of mass 12 to 16 GeV, with two-body decays into bottom quarks and light bottom squarks, yields a bottom-quark production rate in agreement with hadron collider data. We examine constraints on this scenario from low-energy data and make predictions that may be tested at the next run of the Fermilab Tevatron collider.
RESUMO
When two male mice fight to establish social rank, the subordinate exhibits marked splenomegaly, reticulocytosis and decreased hematocrit. Individuals were isolated at weaning, paired 3 weeks later for two 30-min encounter periods daily for up to 3 weeks. After 2 days and 1 week encounter periods, subordinates had significantly decreased levels of hemoglobin in the kidney compared to dominants and controls. Subordinates had increased ATP levels in blood after 1, 2 and 3 weeks of encounter, bone marrow erythroid hyperplasia, as well as a substantial increase in the erythropoietin titre and Fe99 incorporation in spleen and blood.
