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Study of heavy particle production at D0
Benedikt, Tomáš ; Soustružník, Karel (advisor) ; Žáček, Josef (referee)
This work is about properties of top quark and methods of their measurements, which took place at D0 detector. At the beginning the history of the quark model is summarized followed by introduction to D0 detector at Tevatron collider in the USA. The rest of the work is dedicated to methods of measurements of important top quark properties. The most of attention is paid to measurements of production cross section and top quark's mass. The following topics are decay width, determination of the mass difference between top and antitop quarks and determination od top quark's electrical charge. In the end the newest values of top quark's properties are summarized.
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Data analysis of the calorimeter CALICE
Bulánek, Boris ; Žáček, Josef (advisor) ; Zálešák, Jaroslav (referee)
In the present work we study the muon calibration of a hadrnic calorimeter. The calibration issue is divided into three parts. Description of the calibration principle and a comparison of the results with the previous results is described in the rst part. The method of the temperature and voltage corrections is presented in the second part. Also a comparison between the new and previous results is included. The last part is devoted to the study of myom track nding. The modied algorithm for searching muons was developed and compared with the default traknding algorithm.
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The yield formation of spring wheat in depending on preceding crop
ŽÁČEK, Josef
This diploma thesis deals with the comparison of the influence of three different pre-crops on the spring wheat growing in real conditions of a chosen agricultural business. In 2018, a pilot plant test was established on the property in KÚ Dolní Svince, č.p. 0802/23 with the total area of 13,19 ha. For the establishment of the pilot plant test, an area of 5 ha had been used, which, due to its position, occupied the area of all thre pre-crops (corn for silage, winter barley, winter triticale). During the vegetation period, the occurence of weeds had been monitored and the crop yield elements for all stages of all spring wheat had been evaluated. After the harvest, the real crop yield of the wheat had been evaluated and a final economical evaluation had been made. The average crop yield concerning the first option, (pre-crop corn for silage) reached the yield value of 5,65 t.ha-1 , which was a 0,42 t.ha-1 more than the second option (pre-crop winter barley), in which case the value of harvest was 5,23 t.ha-1. Concerning the third monitored option (pre-crop winter triticale), the harvest value was almost similar to the second option - 5,36 t.ha-1. The most suitable pre-crop for the highest harvest of spring wheat is corn for silage, which has reached the highest profit when compared to the other options. In spite of a less advantageous pre-crop, the third option reached the highest-quality of nitrogen and nitrogen compouns.
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Studium difrakčních ep interakcí na hadron-elektronovém collideru
Jansová, Markéta ; Valkárová, Alice (advisor) ; Žáček, Josef (referee)
A new ep collider LHeC is currently planned at CERN. LHeC should comple- ment the physics program of former ep collider HERA and existing hadron-hadron collider LHC. In the LHeC project the collisions of electrons with energy 60 GeV and protons with energy 7 TeV should be studied. The thesis is focused on the study of diffractive charged current deep inelastic scattering interactions, which had already been investigated at HERA collider (H1 experiment), but with un- satisfying statistics. This thesis reproduce Monte Carlo predictions obtained by H1 collaboration for this process and its main goal is calculation of diffractive charged current DIS cross section for future LHeC project.
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