Measurement of the tt-bar Production Cross Section in p anti-p Collisions at s**(1/2) = 1.96 TeV using Lepton + Jets Events with Secondary Vertex b-tagging

none9noneA.Castro; M.Deninno; F.Margaroli; P.Mazzanti; N.Moggi; F.Rimondi; F.Semeria; S.Zucchelli; CDF CollaborationA.Castro; M.Deninno; F.Margaroli; P.Mazzanti; N.Moggi; F.Rimondi; F.Semeria; S.Zucchelli; CDF Collaboratio

Search for Z' --> e+ e- Using Dielectron Mass and Angular Distribution

We search for Z(') bosons in dielectron events produced in p (p) over bar collisions at root s=1.96 TeV, using 0.45 fb(-1) of data accumulated with the Collider Detector at Fermilab II detector at the Fermilab Tevatron. To identify the Z(')-> e(+)e(-) signal, both the dielectron invariant mass distribution and the angular distribution of the electron pair are used. No evidence of a signal is found, and 95% confidence level lower limits are set on the Z(') mass for several models. Limits are also placed on the mass and gauge coupling of a generic Z('), as well as on the contact-interaction mass scales for different helicity structure scenarios

Pesticide Leaching Models in a Brazilian Agricultural Field Scenario

The use of Pesticide Leaching Models (PLM) for risk assessment may be an efficient and attractive way of assessing solutions to some agricultural and environmental problems. Many countries of the European Union and the USA have been using PLM for risk assessment already for a few decades. This chapter has the aim to present a successful application of two PLM (i.e. MACRO and PEARL) in a Brazilian very intensive agricultural area to simulate moisture profiles and the leaching of a water flow tracer (i.e. bromide) and the pesticides cyproconazole and thiamethoxam. Also attempts to summarize the available knowledge about the processes governing pesticide behavior in soil, types and classifications of PLM, the use of PLM for risk assessment at European Union, a theoretical description of PEARL and MACRO models and their testing in a Brazilian agricultural field scenario

NaCl-He Collisional rates

<p>The program calculates the collisional rates for a selected ro-vibration<br> al transition and temperature.</p