Date

Lecturer

Title and Abstract

Files

29. 11. 2007

Joern Kersten

Can LHC Test the See-Saw Mechanism?

22. 11. 2007

Martin O'Loughlin

The AdS/CFT holographic mapping, part II

15. 11. 2007

Svjetlana Fajfer

Porocilo o udelezbah na konferencah v letu 2007

25. 10. 2007

Borut Bajc

Nesupersimetricno poenotenje SU(5) in see-saw tipa III

12. 10. 2007

Ilja Dorsner

The see-saw mechanism predictions within the SU(5) framework. I will discuss recent advancements in our understanding of simple models of grand unification within the SU(5) framework. In particular, I will compare a number of very specific models that primarily differ from each other by the mechanism of neutrino mass generation. I will outline their generic predictions and discuss their testability in some detail. In fact, I will argue that most of them have interesting signatures that can show up in the collider experiments as well as in proton decay search facilities. These correlations might allow not only for them to be falsified but also verified if and when proton decay is detected.

11. 10. 2007

Mitja Rosina and Bojan Golli

Report from the 20th European Fewbody Conference, Pisa, September 10-14 (part 2)

4. 10. 2007

Mitja Rosina and Bojan Golli

Report from the 20th European Fewbody Conference, Pisa, September 10-14

27. 9. 2007

Martin John O'Loughlin
Politehnika Nova Gorica

The AdS/CFT holographic mapping

20. 9. 2007

Ben Pecjak
DESY

B -> V gamma decays at NNLO in SCET. I discuss the QCD factorization formula for B -> V gamma decays, where V is a light vector meson, within the framework of soft-collinear effective theory (SCET). In particular, I review the SCET derivation of the QCD factorization formula for these decays and discuss the calculation of the perturbative hard-scattering kernels at NNLO (alpha_s2). The numerical impact of these higher-order corrections on the branching fractions is estimated, and the results are compared with the current experimental data.

19. 7. 2007

Veljko Dmitrasinovic
Institut Vinca, Beograd

Y-string potential in baryons: the Roper-nucleon mass difference.

31. 5. 2007

Hrvoje Stefancic

Composite dark energy - towards the solution of the cosmological coincidence problem. The accelerated expansion of the present universe represents one of the most intriguing questions for modern cosmology and theoretical physics. Although the candidate mechanisms for the explanation of the acceleration are both numerous and diverse, the concept of dark energy, a negative pressure component of the universe, plays a central role in the analysis of the acceleration phenomenon. Apart from the unknown source of the acceleration, at the present epoch of the evolution of the universe the energy densities of the dark energy component and the nonrelativistic matter component are of the same order of magnitude. Since these two components scale quite differently with the expansion of the universe, this fact is also referred to as the cosmological coincidence problem. We present a cosmological model with composite dark energy and present it as a possible solution to the said coincidence problem. In these models, the dark energy sector contains two components: a variable cosmological term and a generic dynamical X component. In this setting it is possible to have a negative cosmological term which ultimately stops the expansion of the universe. The ratio of energy densities of dark energy and nonrelativistic matter remains of order 1 for a range of model parameters, which characterizes the present value of this ratio as natural in these models. Two specific models are discussed: the models in which the variable cosmological term and the X component interact [1], and the model with a variable cosmological term and a variable Newton coupling G [2]. References: [1] J. Grande, J. Sola, H. Stefancic, JCAP 0608 (2006) 011. [2] J. Grande, J. Sola, H. Stefancic, Phys. Lett . B645 (2007) 236.

17. 5. 2007

Andrej Cadez

Physics in the vicinity of black holes.

7. 5. 2007

Rafael Porto

Effective Field Theory and the problem of Motion in General Relativity. The problem of motion in General Relativity has lost its academic status and become an active research area since the next generation of gravity wave detectors will rely upon its solution. The difficulties in finding the full solution stem from the many different scales involved in the problem: the internal structure (finite size effects), the orbit scale and the long wavelength gravitational radiation. Here we will show how ideas borrowed from effective field theory in condensed matter and particle physics can be used to solve the problem of motion in a systematic fashion, one scale at the time, from a Wilsonian point of view. We then use this new approach to calculate the third order post-Newtonian correction to the spin-spin potential between two spinning bodies, e.g. the hyperfine Einstein-Infeld-Hoffmann potential. This correction represents the first contribution to the spin-spin interaction due to the non-linear nature of General Relativity. Other applications are also discussed.

26. 4. 2007

Kresimir Kumericki
Zavod za teorijsku fiziku,
Sveuciliste u Zagrebu

Holographic imaging of nucleon via deeply virtual Compton scattering and conformal symmetry. The standard description of quarkonic and gluonic content of nucleon, in terms of parton distribution functions (PDFs), contains only information about distribution of longitudinal nucleon momentum among the partons. More general, ``three-dimensional'' description is offered by generalized parton distributions (GPDs). After introduction to GPDs, it will be shown how to extract them from deeply virtual Compton scattering data, and how to employ conformal symmetry in calculation of radiative corrections to this process.

19. 4. 2007

Andrea Romanino
SISSA, Trieste

The flavour puzzle and accidental symmetries. I will illustrate some approaches to understanding the pattern of Standard Model fermion masses and mixings, including a recent proposal based on the emergence of accidental flavour symmetries not far from the Planck scale.

12. 4. 2007

Lotfi Boubekeur
ICTP, Trieste

A biased review on leptogenesis

5. 4. 2007

Marko Staric
Experimental Particle Physics Department (F9)
JSI

Evidence for D-Dbar mixing

29. 3. 2007

Matej Pavsic

Clifford algebra as a possible clue to the unification of fundamental interactions (2.del)

1. 3. 2007

dr. Alejandra Melfo,
Los Andes University,
Merida, Venezuela

Yukawa sector in SO(10)

22. 2. 2007

Matej Pavsic

Clifford algebra as a possible clue to the unification of fundamental interactions

11. 1. 2007

Jure Zupan

Dvodelcni razpadi B mezonov v SCET.

11. 1. 2007

J. O. Eeg
(Univerza v Oslu, Norveska)

Low energy aspects of heavy meson decays

4. 1. 2007

Jure Zupan

Porocilo s konference CKM2006, Nagoya, Japonska