Edgar Casimiro

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Construction of the first stage of the Pierre Auger Observatory has begun. The aim of the Observatory is to collect unprecedented information about cosmic rays above 10 eV: The first phase of the project, the construction and operation of a prototype system, known as the engineering array, has now been completed. It has allowed all of the sub-systems that(More)
We present an analysis of the decayD0→K+π− based on FOCUS data. From a sample of 234 signal events, we find a branching ratio of Γ(D →Kπ) Γ(D0→K−π+) = (0.429 − 0.061 ± 0.027)% under the assumptions of no mixing and no CP violation. Allowing for CP violation, we find a branching ratio of (0.429 ± 0.063 ± 0.028)% and a CP asymmetry of 0.18± 0.14± 0.04. The(More)
We review genetic programming principles, their application to FOCUS data samples, and use the method to study the doubly Cabibbo suppressed decay D → Kπ+π− relative to its Cabibbo favored counterpart, D → Kππ. We find that this technique is able to improve upon more traditional analysis methods. To our knowledge, this is the first application of the(More)
Cardiovascular diseases are on a continuous rise and the number of people who suffer sudden cardiac arrest. It has been recognized a direct influence between the autonomie nervous system and cardiac activity in the human body. Sometimes causes of disease can be explained by studying the relationship of both parts. Analyzing the beat to beat variations from(More)
A high statistics measurement of the Lambda(+)(c) lifetime from the Fermilab fixed-target FOCUS photoproduction experiment is presented. We describe the analysis technique with particular attention to the determination of the systematic uncertainty. The measured value of 204.6 +/- 3.4 (stat) +/- 2.5 (syst) fs from 8034 +/- 122 Lambda(+)(c)-->pK(-)pi(+)(More)
Cardiovascular disease is a serious problem worldwide, are among the leading causes of morbidity and mortality in men and women of all ages. The increased number of deaths from cardiovascular disease is because the western way of life, obesity, diabetes and the traditional methods are not able to predict or detect risk factors in individuals with(More)
A high-statistics sample of photoproduced charm from the FOCUS experiment has been used to search for direct CP violation in the decay rates for D+-->K(S)pi+ and D+-->K(S)K+. We have measured the following asymmetry parameters relative to D+-->K-pi+pi+: A(CP)(K(S)pi+) = (-1.6+/-1.5+/-0.9)%, A(CP)(K(S)K+) = (+6.9+/-6.0+/-1.5)%, and A(CP)(K(S)K+) =(More)
Using a large sample of photoproduced charm mesons from the FOCUS experiment at Fermilab (FNAL-E831), we observe the decay D → Kπ with a signal yield of 149±31 events compared to a similarly cut sample consisting of 36 760±195 D →Kπ events. We use the observed ratio of D→Kπ to D→Kπ (0.404± 0.085± 0.025)% to obtain a relationship between the D mixing and(More)
We have studied hadronic four-body decays of D(+) and D(+)(s) mesons with a K(S) in the final state using data recorded during the 1996-1997 fixed-target run of the Fermilab high energy photoproduction experiment FOCUS. We report a new branching ratio measurement of gamma(D(+)-->K(S)K-pi(+)pi(+))/gamma(D(+)-->K(S)pi(+)pi(+)pi(-)) = 0.0768+/-0.0041+/-0.0032.(More)