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Seminarium Teorii Oddziaływań Elementarnych

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Zapraszamy do Sali Dużej Teoretycznej, ul. Hoża 69 o godzinie 13:15

Arkadiusz Trawiński (IFT UW)

Universality of effective potentials in models of mesons

Many simple pictures of hadrons [1] have been inspired by QCD. They are formulated in the instant-form (IF) of dynamics as well as in the front-form (FF) [2]. One can observe that nearly all considerations in the IF lead to the conclusion that the potential between a quark and an antiquark should be linear at large distances. In contrast, the FF formulation favors a quadratic potential. We shall discuss examples and show that there is no contradiction between the linear IF and quadratic FF confinement potentials [3]. An important tool in our discussion is the Wentzel-Kramers-Brillouin (WKB) formalism which allows one to relate the maximum distances of separation between quarks within mesons in different models.[1] K. G. Wilson and D. G. Robertson, arXiv:hep-th/9411007.[2] P. A. M. Dirac, Rev. Mod. Phys. 21, 392 (1949).[3] A. P. Trawinski, S. D. Glazek, S. J. Brodsky, G. F. de Teramond, H. G.Dosch, arXiv:1403.5651

Zapraszamy do Sali Dużej Teoretycznej, ul. Hoża 69 o godzinie 13:15

Jakub Wagner (NCBJ)

Generalized parton distributions in Deeply Virtual Compton Scattering

Exclusive processes, in particular deeply virtual Compton scattering (DVCS), may be described in terms of generalized parton distributions (GPDs). In comparison to the traditional PDFs, GPDs carry additional information about the structure of hadrons. They allow a better understanding of the nucleon spin structure and its three-dimensional description. I will discuss the theoretical foundations of the description of exclusive processes in terms of GPDs, their basic properties, and existing and planned experiments aiming at GPDs extraction (HERA, JLab, Compass, EIC).

Zapraszamy do Sali Dużej Teoretycznej, ul. Hoża 69 o godzinie 13:15

Pedro Schwaller (CERN)

Leptogenesis and Asymmetric Dark Matter

Zapraszamy do Sali Dużej Teoretycznej, ul. Hoża 69 o godzinie 13:15

Kai Schmidt-Hoberg (CERN)

Naturalness in MSSM singlet extensions beyond the NMSSM

Zapraszamy do Sali Dużej Teoretycznej, ul. Hoża 69 o godzinie 13:15

Alina Czajka (J Kochanowski University)

Ghosts in Keldysh-Schwinger formalism

Introduction of the Faddeev-Popov ghosts to the Keldysh-Schwingerformalism describing equilibrium and non-equilibrium statistical systems ofquantum fields such as the quark-gluon plasma is considered. Theplasma is assumed to be homogeneous in a coordinate space but the momentumdistribution of plasma constituents is arbitrary. Withgenerating functional technique we derive the Slavnov-Taylor identities andone ofthem expresses the ghost Green's function, which we look for, through thegluon one. As an application, the Green's function of ghosts is used tocompute the gluon polarization tensor in the hard loop approximation whichappears to be automatically transverse, as required by the gauge invariance.

Zapraszamy do Sali Dużej Teoretycznej, ul. Hoża 69 o godzinie 13:15

XXII Int. Workshop on Deep Inelastic Scattering and Related Subjects

The workshop takes place from April 28 to may 2, 2014, in the former University Library Building on 26/28 Krakowskie Przedmiescie. The detailed program can be found on http://dis2014.fuw.edu.pl. To attend, the registration is required.

Zapraszamy do Sali Dużej Teoretycznej, ul. Hoża 69 o godzinie 13:15

Kazuki Sakurai (King’s College London)

Towards efficient evaluation of LHC constraints on new physics models

ATLAS and CMS have conducted number of direct BSM searches and placed an impressive limit on the new physics parameter space. However the experimental collaborations derive their constraints only on specific models. I would like to review the recent progress of recasting existing searches on a generic new physics models and introduce our programmes (ATOM and Fastlim) which allow us to test a generic new physics model accurately and efficiently against various existing searches.

Zapraszamy do Sali Dużej Teoretycznej, ul. Hoża 69 o godzinie 13:15

Robert Ziegler (TU Muenchen)

Relating the SUSY flavor problem to the SM flavor puzzle

Zapraszamy do Sali Dużej Teoretycznej, ul. Hoża 69 o godzinie 13:15

Wojciech Wiślicki (NCBJ)

Examination of the CPT and Lorentz invariance with neutral mesons

We discuss basics of the CPT and anti-CPT theorems, the logic behind and physics motivation for testing CPT and Lorentz invariance with extreme precission. The best accuracy is nowadays provided by interferometric measurements in neutral meson systems. We present current experimental knowledge from the strange, charm and beauty decays, with emphasis on the recently obtained results by KLOE using neutral kaons. Perspectives for improvements are also discussed.

Zapraszamy do Sali Dużej Teoretycznej, ul. Hoża 69 o godzinie 13:15

Michał Bluj (NCBJ)

Higgs panorama after LHC Run-I

A status of the Higgs boson search after LHC Run-I will be given. The talk will be focused on properties of the 125 GeV Higgs boson and its agreement with predictions of the Standard Model, but also some highlights of beyond SM Higgs searches will be given.

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