The UA1 Collaboration has recently improved its measurement of the beauty production cross-section by including explicit measurements of b
b
correlations. Using these data we have determined the ...strong coupling constant
α
s
. The comparison of the measured cross-section for 2-body final states with
O(
α
s
3) QCD predictions yields a measurement of
α
s
(20 GeV) = 0.145
−0.010 exp −0.016 th
+0.012 +0.013, corresponding to
α
s
(
M
z
) = 0.113
−0.006 exp −0.009 th
+0.007 +0.008. This is the first theoretically well-defined measurement of
α
s
from a purely hadronic production process. Evaluating
α
s
from cross-sections at different
Q
2-values we find that the running of
α
s
is needed for internal consistency of the UA1 data.
We combine the results of the CDF and D0 searches for chargino and neutralino
production in Gauge-Mediated SUSY using the two-photon and missing Et channel.
The data are p-pbar collisions produced at ...the Tevatron with sqrt(s)=1.96 TeV,
with 202 pb^-1 collected at CDF and 263 pb^-1 collected at D0. The combined
limit excludes a chargino mass less than 209 GeV/c^2. This result significantly
extends the individual experimental limits.
Foi realizado no ano agrícola 1976/77 um experimento em solo arenoso na Usina Utinga/LeãoAL, no qual foram testados em pré-emergência os tratamentos: hexazinone em 4 doses; hexazinone + diuron em 3 ...doses; diurom + 2,4 D amina e ametrina + 2,4 D amina. Aos 47, 78 e 111 dias, efetuaram-se as avaliações de fitotoxicidade à cana-de-açúcar e controle à Digitaria sanguinalis , Colopogonio sp, Paspalum distichum e Wedellia paludosa. A interpretação dos dados obtidos mostrou que os tratamentos com hexazinone (954 g/ha) e hexazinone (719 g/ha) + diuron (2048 g/ha) apresentaram diferença estatística em relação à produção quando comparadas à testemunha, além de serem eficientes no controle às plantas daninhas presentes no experimento. Nenhum tratamento prejudicou as qualidades tecnológicas da cana-de-açúcar.In the Agricultural year 1976/77, a field trial was performed on a sandy soil in "Usina Utinga Leão-Alagoas", where the following treatments were applied: hexazinone at 4 rates; hexazinone + diuron at 3 rates; diuron + 2,4 D (amine 720) and ametrine + 2,4 (amine 720), all in pre-emergence. Phytotoxity evaluation for sugar cane and control of Digitaria sanguinalis, Colopogonio sp, Paspalum distichum and Wedellia paludosa, were made 47, 78 and 111 days after the applications. The results obtained showed that the treatments with hexazinone (945 g/ha) and hexazinone (719 g/ha) + diuron (2048 g/ha) presented statistic differences relating to yield, when compared to check, besides being effective in the weeds control. No treatment caused any alterations on tecnologic qualities of the sugar cane.
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