Tuesday, 14 December 2010 14:33

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New physics from W polarisation in top quark decays

Tuesday December 14th, 14.30hs - Seminar room

Speaker: José Bernabeu (IFIC, Valencia)


From the most general Wtb vertex arising from dimension-six gauge invariant effective operators, I discuss the density matrix for the decay of a polarised top quark into a polarised W boson and a b quark.

Searching for New Physics with Top Quark Decays

Friday December 3rd, 14:15hs - Seminar room

Speaker: Jernej F. Kamenik (Jozef Stefan Institute, Ljubljan)



We analyze possible new physics signals in the decays of the top quark within an effective field theory approach. In particular, we compute the branching ratios for the rare top quark decays t to c gamma and t to c Z mediated by effective flavor changing neutral couplings at the next-to-leading order in QCD including the effects due to operator mixing.

Geneva, 26 November 2010. After less than three weeks of heavy-ion running, the three experiments studying lead ion collisions at the LHC have already brought new insight into matter as it would have existed in the very first instants of the Universe’s life.


The structure of 4D Conformal Field Theories

Friday November 26th, 14:30hs -  Seminar room

Speaker: Slava Rychkov  (ENS & UPMC, Paris)


I will review the status of the program, initiated a few years ago by the speaker and R. Rattazzi, of putting model-independent bounds on the structure of 4D CFTs by using OPE associativity and unitarity. I will also discuss applications to BSM phenomenology.


NOVEMBER 2011 - IFAE among the top ten Catalan research institutes

From La Vanguardia, November 17th 2010:

The emergence of Dirac Pyisics in Graphene

Tuesday, November 23rd, 14:00hs. - Coffee room

Speaker: Alessio Celi (UB)


After a very brief introduction to the genesis of the material and to the (apparent) clashing with the Mermin-Wagner theorem, I will show that many of the surprising experimental properties, like the relativistic dispersion relation of the quasi-electrons, can be easily explained by the tight-binding approx (Hubbard model).

Neutrinoless double beta decay: Neutrino mass versus exotic contributions

Friday, November 19th, 14:30 - Seminar room

Speaker: Martin Hirsch (IFIC, Valencia)


Neutrinoless double beta decay is a very sensitive probe for physics beyond the standard model. Usually it is discussed only as a probe for the (Majorana) neutrino mass scale but, in principle, any model with lepton number violation can contribute to its amplitude.

Discrete Symmetries and the Flavour Problem

Friday November 12th, 14.30hs - Seminar room

Speaker: Luca Merlo  (TUM, Munich)


The flavour puzzle is an open problem in the Standard Model and the use of new symmetries helps in explaining the fermion mass hierarchies and mixings as well as the (non-)observation of FCNC processes. I will review the main idea of the flavour model building with a particular attention to the discrete non-Abelian symmetries. Furthermore I will give few examples of possible strategies to test flavour models.



NOVEMBER 2010 - Postdoctoral Position at the IFAE theory group

The Theory Group at the Institut de Física d'Altes Energies (IFAE), on the UAB Campus (Barcelona) invites applications for a Postdoctoral Position in Theoretical Particle Physics starting in September 2011. The appointment will be for two years. A third year may be possible but will be subject to evaluation.

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