Beautiful Mirrors at the LHC

Friday July 9th, 14:30h - Seminar Room

Speaker: Roberto Vega-Morales (Northwestern University)

Abstract: In this talk I will explore the "Beautiful Mirrors" model, which aims to explain the measured value of A^b_FB, discrepant at the 2.9sigma level. This scenario introduces vector-like quarks which mix with the bottom, subtly affecting its coupling to the Z. The spectrum of the new particles consists

Cosmic-ray signatures of dark matter decay

Monday July 5th, 12:00 hs - Seminar room

Speaker: Alejandro Ibarra  (Technische Universität München)

Variations on Minimal Flavour Violation

Friday July 2nd, 2010, 14.30 hs - Seminar room

Speaker: Thorsten Feldmann (Technische Universitat Munchen)

Abstract: In this talk I will present some recent applications and extensions of the concept of "minimal flavour violation" (MFV), which is frequently used to constrain the flavour sector of new physics models. I will shortly explain how to define MFV in the effective-theory context, making use of Yukawa

Physics prospects of CTA

Speaker:  Diego Torres (ICREA/IEEE)

Abstract: The high energy gamma ray community is joining efforts to build a new array of Cherenkov telescopes. It foresees a factor of 10 improvement in sensitivity and an extension of the accessible energy range from a few tens of GeV up to 100 TeV. The aim of this this lecture is to present a perspective on the physics and astrophysics possibilities of the Cerenkov Telescope Array, which is currently in Design Study

Rescattering effects in eta -> 3pi decays

Speaker: Bastian Kubis (HISKP-Theory, Bonn University)

Abstract:The isospin-breaking decay eta -> 3pi is an ideal tool to extract information on the light quark mass ratios from experiment. For a precise determination, however, a detailed description of the Dalitz plot distribution is necessary. In that respect, in particular the

(small) slope parameter of the neutral decay channel causes some concern, since the one- loop prediction from chiral perturbation theory misses the experimental value substantially. I will describe a dedicated framework to analyse final-state interactions beyond one loop, including isospin-breaking corrections, and present our current understanding of the eta -> 3pi Dalitz plot parameters thus obtained.

A New Clue to Explain Existence

speaker: Alexander Lenz (Regensburg University)

Abstract: Recently headlines like "A New Clue to Explain Existence" went around the world to describe the result of the D0 collaboration at TeVatron presented on Friday 14th May. D0 measured semileptonic CP-Asymmetries in the two neutral B-meson systems and found a 3.2 sigma difference compared to the standard model (SM) expectation. We will review several different measurements that hint at deviations in the $B_s$ mixing system. In particular we will discuss the robustness of the corresponding SM predictions. Moreover we will also present some possible extensions of the SM that would give rise to large CP-violating effects in the $B_s$ system.

A Warped Model of Dark Matter

Friday June 25th, 14:30 - Seminar room

Speaker: Benedict von Harling (University of Melbourne)


We present a model of dark matter in a warped extra dimension in which various dark sector mass scales are naturally generated without supersymmetry. The dark matter, whose mass is in the TeV range, is charged under a dark abelian gauge group. The corresponding dark photon obtains a mass in the

Solving Steiner's 200 year old problem

Wednesday June 23rd, 14:00 - Coffe room

Speaker: Javi Virto



In an exciting submersion into the realm of convex sets in Hyperbolic space, I will show how an apparently disconnected problem can be solved: Steiner's characterization of Euclidean polytopes inscribed in the sphere. Useless but really FUN!




Non-gaussianity and large-scale structure surveys

Monday, June 7th, 14:30 - Seminar Room

Speaker: Licia Verde (ICC, Universitat de Barcelona)

Abstract: It has recently been shown that a popular type of primordial non-gaussianity affects drastically the clustering of extrema such as massive dark matter halos. This effect goes under the name of non-gaussian halo bias. Since galaxies, especially at high redshfits, are expected to trace such halos,

Unitarity applied to hidden sector processes

Friday May 28th, 14:30  -  Seminar room

Speaker: Antonio Delgado (Notre Dame, Indiana)


There has been some attention to the possibility that there exist hidden sectors coupled to the standard model with couplings suppressed by an energy scale such that it has not been possible to access them yet but the LHC will have

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