February 2001: | F. Kleefeld (CFIF, IST, Lisbon): | |
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"Dyson-Schwinger Techniques and the Bethe-Salpeter Equation (Introduction)" | ||

(1st course in ``QCD and More'', CFIF post graduate lecture courses 2001) | ||

Remarks: | ||

The (English) course is supposed to provide (post-graduate) students with non-vanishing backround in Quantum-Mechanics and Field-Theory with the minimum formalism and techniques necessary to attack the problems discussed in the title pointing out also relevant literature. On the other hand it tries to address modern aspects and open problems of the field under consideration. In order to increase their calculational practise throughout the tutorials students are posed to mathematical field theoretical or numerical problems related to the lectures to be solved under the supervision of lecturer. Analytical or numerical problems are also provided for the weeks between successive lectures to be finally discussed in tutorials. | ||

Dates: Thursdays 1, 8, 15 and 22/02/2001
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Room: Sala P1, IST Edifício Pós
Graduação
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Time : 1:30-3:00 pm (lectures), 3:30-5:00 pm (tutorials)
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Tutorials and Homeworks: | ||

1st Tutorial (1.2.2001) and 1st Homework (1.-8.2.2001) | ||

2nd Tutorial (8.2.2001) and 2nd Homework (8.-15.2.2001) | ||

3rd Tutorial (15.2.2001) and 3rd Homework (15.-22.2.2001) | ||

4th Tutorial (22.2.2001) and 4th Homework (22.-29.2.2001) | ||

March 2002: | F. Kleefeld (CFIF, IST, Lisbon): | |

"On the Consistency and Renormalizability of Relativistic Quantum Field Theories" | ||

(4th course in ``QCD and More'', CFIF post graduate lecture courses 2001/2002) | ||

Remarks: | ||

The (English) course will be a systematic introduction to Relativistic Quantum Field Theory with special focus on the topics listed in the title. The course will be set up for postgraduate students with non-vanishing background in Quantum Mechanics and will be also of greatest interest to researchers with a longer standing experience in Relativistic Quantum Field Theory. I intend to provide also weekly tutorials with practical exercises and homeworks. | ||

Dates: Thursdays 21, 28/3/2002 and 4, 11/4/2002
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Room: Sala P3, IST Edifício Pós
Graduação
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Time : 1:30-3:00 pm (lectures), 3:30-5:00 pm (tutorials)
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Tutorials and Homeworks: | ||

1st Tutorial (21.3.2002) and 1st Homework (21.-28.3.2002) | ||

2nd Tutorial (28.3.2002) and 2nd Homework (28.3.-4.4.2002) | ||

3rd Tutorial (4.4.2002) and 3rd Homework (4.-11.4.2002) | ||

4th Tutorial (11.4.2002) and 4th Homework (11.4.-18.4.2002) | ||

February 2005: | F. Kleefeld (CFIF, IST, Lisbon): | |

"On leptonic, semi- and non-leptonic weak pseudoscalar meson decays in the quark-level linear sigma model" | ||

(Oral presentation given in the Midterm meeting of of EURIDICE Network, 8.-12.2.2005, Frascati, Italy) | ||

Abstract: | ||

The theoretical description of leptonic, semi- and non-leptonic weak decays of pseudoscalar mesons has been not only known to be extremly challenging since at least five decades, is it also well known to be of crucial importance for our understanding of various still puzzling aspects within the standard model of particle physics and beyond, like e.g. CP-violation, CKM-matrix elements, heavy quark physics, the theory of strong interactions, the existence and properties of scalar meson resonances etc.. To use the words of G. Colangelo during a 2003 workshop on hadron physics in Coimbra: "The calculation of the K --> pi pi amplitude in the Standard Model still remains one of the most difficult and yet unsolved problems of today's particle physics, despite many years of efforts and progress in our understandings of various related physics aspects." To our understanding this is due to the fact, that one does not exactly know, how to obtain a quantitative estimate of contributions from strong interactions to respective decay processes, while the electroweak contributions to these processes seem to be at least approximately known. As the direct implementation of QCD in this context in particular at intermediate energies is rather cumbersome, it is very popular to estimate the strong interaction contributions to respective weak decay processes on the basis of a low energy effective description of strong interaction physics known as Chiral Perturbation Theory. Our presentation is supposed to report on most recent complementary very promising theoretical results and techniques for the description of leptonic, semi- and non-leptonic weak light and heavy pseudoscalar meson decays, in which the contributions of strong interactions are determined on the basis of the Quark-Level Linear Sigma Model (QLLSM). The QLLSM does not only allow us to illuminate explicitly an intimate formalistic relation between electroweak and strong interactions, yet also to test the importance and properties of vector and scalar meson dominance contributions. | ||

Date: Friday, 11.2.2005
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Room: Aula Bruno Touschek, INFN-Frascati National Laboratory, Italy
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Time : 10:45-11:05 am
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Transparencies: | ||

Transparency Nr. 01 (Frontpage, copyright) | ||

Transparency Nr. 02 (Pairing of scalar and vector mesons) | ||

Transparency Nr. 03 (QLLSM - N. Cabbibo and L. Maiani, 1970) | ||

Transparency Nr. 04 (QLLSM - N. Cabbibo and L. Maiani, 1970) | ||

Transparency Nr. 05 (QLLSM - N. Cabbibo and L. Maiani, 1970) | ||

Transparency Nr. 06 (QLLSM - F. Kleefeld, M.D. Scadron, G. Rupp, E. van Beveren) | ||

Transparency Nr. 07 (Conjectures about scalar mesons and related Lagrangeans) | ||

Transparency Nr. 08 (Motivating the QLLSM Lagrangean from QCD) | ||

Transparency Nr. 09 (Motivating the QLLSM Lagrangean from QCD) | ||

Transparency Nr. 10 (Motivating the QLLSM Lagrangean from QCD) | ||

Transparency Nr. 11 (Flavour U(6) x U(6) meson field matrices) | ||

Transparency Nr. 12 (Motivating the QLLSM Lagrangean from QCD) | ||

Transparency Nr. 13 (Motivating the QLLSM Lagrangean from QCD) | ||

Transparency Nr. 14 (The QLLSM Lagrangean used in the following) | ||

Transparency Nr. 15 (New method to determine the Effective Action for specific processes) | ||

Transparency Nr. 16 (Resulting Effective Action for leptonic pseudoscalar meson decays) | ||

Transparency Nr. 17 (Derivation of GT-relations/sum-rules for pseudoscalar decay constants) | ||

Transparency Nr. 18 (List of resulting sum-rules for pseudoscalar decay constants) | ||

Transparency Nr. 19 (Resulting Effective Action for semi-leptonic pseudoscalar meson decays) | ||

Transparency Nr. 20 (Effective Action for semi-leptonic pion and kaon decays - examples) | ||

Transparency Nr. 21 (Resulting vector and scalar meson dominance in K+ --> Pi0 transition formfactors) | ||

Transparency Nr. 22 ("Measuring" the complex (purely imaginary) phase of the QLLSM Yukawa coupling) | ||

Transparency Nr. 23 (Particle Data Group values for f-(0)/f+(0) for K+ --> Pi0 transitions) | ||

Transparency Nr. 24 (Particle Data Group values for f-(0)/f+(0) for K+ --> Pi0 transitions) | ||

Transparency Nr. 25 (|m_u| as a function of m_s/m_u for given f+(0)) | ||

Transparency Nr. 26 (|m_u| as a function of m_s/m_u for given f+(0)) | ||

Transparency Nr. 27 (|m_kappa| as a function f-(0)/f+(0) for given f+(0)) | ||

Transparency Nr. 28 (Resulting expressions for K0 --> Pi- transition formfactors) | ||

Transparency Nr. 29 (Resulting expressions for D+ --> Pi0 transition formfactors) | ||

Transparency Nr. 30 (Vacuum saturation puzzle in non-leptonic pseudoscalar meson decays) | ||

Transparency Nr. 31 (Non-leptonic pseudoscalar meson decay puzzle explained in the QLLSM) | ||

Transparency Nr. 32 (Vacuum saturation proposed by M.D. Scadron and S.R. Choudhury, 1987) | ||

Transparency Nr. 33 (Vacuum saturation proposed by M.D. Scadron and S.R. Choudhury, 1987) |