Dear all,

This Thursday, April 11th, there will be extra colloquia by Christoph Weniger and Claudia Hagedorn.

Speaker: Christoph Weniger

Time & Location: 11:00 - 12:00 in room A1.10

Title: Indirect searches for dark matter

Abstract: Unraveling the nature of dark matter is one of the most exciting tasks of current fundamental and astroparticle physics. The currently leading hypothesis for particle dark matter - weakly interacting massive particles(WIMPs) - is probed in a multitude of ways. Among these probes are indirect searches for signals in the flux of cosmic- and gamma-rays. Recently, we identified a tentative gamma-ray line in the Galactic center observations of the Fermi LAT, which would be an unequivocal smoking-gun signature for dark matter annihilation in the Universe. One year after discovery, the signature is still as ambiguous as it could be. I discuss recent experimental and theoretical developments and show how the situation could be clarified until end of next year.

Speaker: Claudia Hagedorn

Time & Location: 15:00 - 16:00 in room C1.112

Title: The mystery of flavor

Abstract: I will discuss the peculiar features of the fermion mass and mixing patterns and point out crucial differences between quarks and leptons. I will explain why and how flavor symmetries can play the key role in understanding these features. Furthermore, I will briefly mention the impact of such symmetries on flavor-violating processes in theories beyond the Standard Model in which new gauge interactions and/or additional particles are in general present.

_____ Universiteit van Amsterdam Institute of Physics (IoP), FNWI drs. Anne-Marieke Crommentuijn Secretariat IoP Postbus 94485 | 1090 GL Amsterdam Science Park 904 | 1090 GL Amsterdam T +31 (0)20 525 5773 | F+31 20 525 5778 Aanwezig op di | wo | do| vr

From: Crommentuijn, Anne-Marieke Sent: donderdag 4 april 2013 12:51 To: all-iop; 'theory-seminar@nikhef.nl' Subject: Extra colloquium by Rikkert Frederix on Friday April 5th at 3pm in room C0.110

Dear all,

This Friday, April 5th, there will be an extra colloquium by Rikkert Frederix at 3pm in room C0.110.

Speaker: Rikkert Frederix

Title: Tools for LHC phenomenology -- the road from postdictions to predictions

Abstract:

The world's largest particle accelerator, the LHC, has been running extremely well during the last couple of years. The data recorded by the experiments is of extremely high quality, surpassing most expectations. To get the most out of the data by comparing them to theory, predictions of evenly high quality are a must. In this talk I'll discuss the FxFx merging procedure, implemented in the aMC@NLO program, that allows for the simulation of events at unprecedented precision.

_____ Universiteit van Amsterdam Institute of Physics (IoP), FNWI drs. Anne-Marieke Crommentuijn Secretariat IoP Postbus 94485 | 1090 GL Amsterdam Science Park 904 | 1090 GL Amsterdam T +31 (0)20 525 5773 | F+31 20 525 5778 Aanwezig op di | wo | do| vr