|
|
Diagnostika motoru Škoda 1,4 MPi
TRNKA, Jaroslav
The bachelor's thesis deals with engine diagnostics od Škoda Fabia 1st generation vehicles with a 1.4 16 V 55 kW petrol engine, MPi injection and the BKY engine code. The diagnostic measurement was performed on two vehicles, which differ in the work according to the colour of the body. The first chapter describes the diagnostic equipment used in vehicle repair and maintenance. The next chapters deal with the goal and methodology of the bachelor's thesis, ending with the results, discussion and conclusion.
|
|
|
Effective description of resonances at low energy region
Kadavý, Tomáš ; Kampf, Karol (advisor) ; Hořejší, Jiří (referee) ; Trnka, Jaroslav (referee)
In this doctoral thesis, we study all the relevant two- and three-point Green functions of the chiral currents and densities. Specifically, in the first part of the thesis, we present the leading-order contributions of the QCD condensates up to dimension six to these Green functions, obtained within the framework of the Operator product expansion. These consist of the perturbative contribution followed by the contributions of the quark, gluon, quark-gluon and four-quark condensates. In the second part, we restrict ourselves to the order parameters of the chiral symmetry breaking in the chiral limit. We investigate them within the Chiral perturbation theory and Resonance chiral theory and, in order to obtain constraints on the parameters of the effective Lagrangians, we require their high-energy behaviour to match OPE. As it turns out, the duplication of the lowest vector, axial-vector, scalar and pseudoscalar resonance multiplets in the corresponding Lagrangians is necessary. As a special case, we study the ⟨V V P⟩ Green function with three vector and three pseudoscalar resonance multiplets taken into account - needless to say, this investigation is performed on an algebraic level only. We also study the correlation of the pion-pole contribution to the muon g − 2 factor and the effective parameter χ(r) . 1
|
|
|
Studium rezonancí v anomálním sektoru kvantové chromodynamiky
Kadavý, Tomáš ; Kampf, Karol (advisor) ; Trnka, Jaroslav (referee)
The independent operator basis of the most important resonances in the so-called odd-intrinsic parity sector was formulated in [1]. Using these ope- rators we can construct Lagrangians of corresponding Feynman diagrams, that allow us to describe and understand several interaction processes. In the mentioned article were studied Green functions for V V P and V AS correlators including their phenomenological aspects. This thesis should establish the Feynman rules for not so much known Green functions corresponding to AAP , V V A and AAA correlators. Because not enough theoretical or experimental attention has been paid to these correlators, we will not be able to perform phenomenological study. But we can return to this point in the future during master degree studies. Reference [1] K. Kampf and J. Novotny, Phys. Rev. D 84 (2011) 014036 [ar- Xiv:1104.3137 [hep-ph]]. 1
|
|
| |
|
|
Resonances in chiral perturbation theory
Trnka, Jaroslav ; Novotný, Jiří (advisor) ; Kampf, Karol (referee)
In the present work we study the role of resonances in Chiral Perturbation Theory (PT), concretely the vector resonances 1. In the rst part there is presented the way which leads to the introduction of the Resonance Chiral Theory (RT). This is an approximation to QCD with innite number of colors. Then we do the calculations of various correlators and we study the high energy constraints dictated by OPE and the relationship between RT and PT at low energies. The last chapter briey mentions the problem of renormalization in RT.
|
|
|
Green functions of currents in the odd-intrinsic parity sector of QCD
Kadavý, Tomáš ; Kampf, Karol (advisor) ; Trnka, Jaroslav (referee)
Green functions of currents allow us to study resonances in the low- energy limit of QCD. Using them, we can construct amplitudes or decay widths of processes. By a comparison of the theoretical predictions with experimental measurements we can determine the values of parameters of the theory and obtain a more comprehensive understanding about the be- haviour of QCD processes. In our investigated topic, an odd-parity sector of QCD, exist five nontriv- ial three-point Green functions, also referred to as correlators. Correlators V V P and V AS have already been studied in [1], whilst a calculation of AAP was provided in [2]. In this thesis we therefore deal with the Green functions V V A and AAA that have not yet been studied before. We present a complete calculation of the contributing Feynman diagrams in the anti- symmetric tensor formalism that satisfies high-energy behaviour within the OPE framework, as was shown also in [2]. The obtained results are submit- ted to phenomenological studies. Further, we also present an introduction to our calculations of the four- point Green functions V V PP and V V V V . The calculations were carried out both in the antisymmetric tensor and vector formalism but due to the complicated tensor structure of the results, the calculations can not be shown here in their...
|
|
|
Humanity and animality between Heidegger and Derrida
Trnka, Jaroslav ; Koubová, Alice (advisor) ; Michálek, Jiří (referee) ; Chvatík, Ivan (referee)
This work deals with the difference between man and animal in the context of the theme of time as treated by Heidegger and Derrida. The starting point of the work is the critique of early Heidegger and his characterization of animal as poor in world. This critique targets his thinking of time and possibility. As first two chapters try to show, despite his basic emphasis on time and on the possibility character of human being, Heidegger still thinks time on the basis of presence and possibility on the basis of reality. Only after taking this step can he think animal privatively as meaningless or poor - in a certain absence of time. This critique results in looking for a more consistent thinking of time and possibility as a way to a more welcoming thinking of animal. The third chapter is concerned with Derrida's objections to searching for other time and it maps the main problems connected with this project of Heidegger. The next three chapters present the main analysis of Heidegger's later thought of time. The differences between his late and early thought are emphasized as the differences between his late speech Time and Being and the early work Being and Time. Heidegger in his later works explores the unity of the three-dimensional time and bewares to think it as presence. The ground of the unity...
|
|
|
Resonances in chiral perturbation theory
Trnka, Jaroslav
Nazev prace: Resonance v chiralm poruchove teorii Autor: Jaroslav Trnka Katedra (ustav): Ustav casticove ajaderne fyziky Vedouci bakalafske prace: RNDr. Jiff Novotny GSc. e-rnail vedouciho: jiri.novotny@mff. cuni. cz Abstrakt: V pfedlozene praci studujeme roli resonanci v chiralni poruchove teorii konkretne vektorovych resonanci 1 . V prvnf casti je nazriacena cesta, ktera vede k zavedenf resoiiancrii chiralni teorii (R^T), jez je aproxiinaci ke QCD v limite velkelio poctu barov. V dalsi casti prace na priklade vypoctu konkretuich korelatoru studujeme vysokoenergeticke podrrunky plynouci 2 OPE a vztah R%PT a xPT pfi nizkych energii. V poslediu kapitole se take kratcc dotknerne otazky renormalizace v R%T a naanacime pfipadne problemy, ktere se zde mohou objevit. Klicova slova: chiralni poruchova tcorie, vektorove resonance, QCD, resonaricrii chiralni teorie Title: Resonances in Chiral Perturbation Theory Author: Jaroslav Trnka Department: Institute of Particle and Nuclear physics Supervisor: RNDr. Jiff Novotny CSc. Supervisor's e-mail address: jiri.novotriyiSmff .cuni. cz Abstract: In the present work we stud}' the role of resonances in Chiral Perturbation Theory (^PT), concretely the vector resonances 1 . In the first part there is presented the way which leads to the introduction of the...
|
|
|
Green functions of currents in the odd-intrinsic parity sector of QCD
Kadavý, Tomáš ; Kampf, Karol (advisor) ; Trnka, Jaroslav (referee)
Green functions of currents allow us to study resonances in the low- energy limit of QCD. Using them, we can construct amplitudes or decay widths of processes. By a comparison of the theoretical predictions with experimental measurements we can determine the values of parameters of the theory and obtain a more comprehensive understanding about the be- haviour of QCD processes. In our investigated topic, an odd-parity sector of QCD, exist five nontriv- ial three-point Green functions, also referred to as correlators. Correlators V V P and V AS have already been studied in [1], whilst a calculation of AAP was provided in [2]. In this thesis we therefore deal with the Green functions V V A and AAA that have not yet been studied before. We present a complete calculation of the contributing Feynman diagrams in the anti- symmetric tensor formalism that satisfies high-energy behaviour within the OPE framework, as was shown also in [2]. The obtained results are submit- ted to phenomenological studies. Further, we also present an introduction to our calculations of the four- point Green functions V V PP and V V V V . The calculations were carried out both in the antisymmetric tensor and vector formalism but due to the complicated tensor structure of the results, the calculations can not be shown here in their...
|
|
|
Lagrangians for effective field theories and their properties
Trnka, Jaroslav ; Novotný, Jiří (advisor) ; Hořejší, Jiří (referee) ; Bydžovský, Petr (referee)
Název práce: Studium efektivních Lagrangianů a jejich aplikace Autor: Jaroslav Trnka Katedra: Ústav částicové a jaderné fyziky Vedoucí disertační práce: RNDr. Jiří Novotný, CSc., ÚČJF Abstrakt: V této práci studujeme různé aspekty efektivních teorií pole pro kvan- tovou chromodynamiku (QCD). V prvních dvou kapitolách se zaměříme na efek- tivní teorii pro resonance, která interpoluje mezi nízkoenergetickou efektivní teorií (Chirální poruchová teorie) a vysokoenergetickou QCD. V rámci této teorie studu- jeme jednosmyčkovou renormalizaci, jak z pohledu výpočetního pomocí SS-PP korelátoru, tak i čistě koncepčního studiem dynamicky generovaných stupňů vol- nosti. Ve čtvrté kapitole studujeme amplitudy rozptylu v rámci nelineárního sig- ma modelu, který představuje vedoucí člen nízkoenergetické efektivní teorie pro QCD. V návaznosti na nedávné objevy v rámci Yang-Mills teorie se nám podaří v rámci tohoto modelu zkonstruovat rekurzivní relace pro stromové amplitudy. Kromě čistě teoretické důležitosti tohoto faktu představuje tato metoda efektivní výpočetní nástroj nezávislý na formulaci amplitud pomocí Feynmanovských dia- gramů. Klíčová slova: efektivní teorie pole, kvantová chromodynamika, nelineární sigma model...
|
guest ::
RSS feed.