Antares-nikhef August 2011

antares-nikhef@nikhef.nl

2 participants
5 discussions

seminar tomorrow 11 am : Anisotropy Studies with the Pierre Auger Observatory
by Aart Heijboer 29 Feb '12

29 Feb '12

Hi all, Tomorrow at 11 am in h320 there will be a seminar by Stephan Schulte, who is interviewing for a post-doc position in our group. Title and abstract are below. I'd appreciate it if you come and ask questions! best regards, Aart. Anisotropy Studies with the Pierre Auger Observatory Stephan Schulte - RWTH Aachen University The Pierre Auger Observatory (PAO) in Malargüe (Argentina) reconstructs the arrival directions and energies of cosmic rays with energies exceeding 10^{18} eV. Under the assumption that the primary particles at the highest energies are only minimally deflected by the intergalactic magnetic field, it can be tested whether their arrival directions overlap with astronomical objects. In this context the PAO has observed a correlation of ultra high energy cosmic rays (UHECR) with nearby active galactic nuclei (AGN). In this talk a complementary approach is chosen. To this end, Autocorrelation methods are studied. They have the advantage of being independent of source and propagation models predicting the distribution of the arrival directions of UHECRs. However, to discover the assets and drawbacks of each method a Monte Carlo study is performed using simulated data sets based on a few of these modes. In the end, we compare the result when applied to data to the one of the catalogue-dependent correlation analysis by using the same event set.

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[Theory-center] Reminder: Theory center meeting next friday on 26-8-2011
by Eric Laenen 19 Aug '11

19 Aug '11

Dear colleagues, a reminder that a Theory Center Meeting is scheduled for next friday, 26-8-2011. As usual, please register at http://www.nikhef.nl/pub/theory/registration/index.php Morning talk is tba. Best wishes, Eric Agenda August 26 * Time: 10.00 - 17.00 * Talk 10.30 - 10.45, H320 pre-talk question session * Talk 10.45-11.15, H320 TBA * Time: 15.00 - 16.00 Student meeting/discussion Daan Meerburg: "non-Gaussianities " The cosmic microwave background (CMB) is believed to a direct relic of quantum fluctuations during inflation. Investigating the distribution of temperature fluctuations in the CMB should shed more light on the physics of inflation. As it turns out, the observed distribution of temperature fluctuations in the CMB is very close to Gaussian, which can be described, to first order, by only two parameters; the variance and the change of variance as a function of scale. These two parameters can be related to predictions made by inflation through the power and the tilt of the primordial distribution of curvature perturbations. I will talk through some of the physics involved in connecting theoretical predictions to the observations. Many models of inflation yield very similar values of these two parameters, making it difficult to verify or falsify those models. Ideally, we would like to extract additional information (parameters) from the CMB. I will discuss two possibilities: looking for higher order corrections to the scale dependence of the variance of fluctuations (the 2 point correlation function), and looking for higher correlation statistics (3 point correlation and beyond), probing possible deviations from Gaussianity. * Talk 16.15-16.30-17.00, H320 Jamil Hetzel " Probing the supersymmetry breaking mechanism using renormalisation group invariants" * 17.00 Borrel _______________________________________________ Theory-center mailing list Theory-center(a)nikhef.nl https://mailman.nikhef.nl/mailman/listinfo/theory-center

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[Theory-center] Correction dates TPP workshop: 30/11 - 2/12
by Eric Laenen 15 Aug '11

15 Aug '11

Dear colleagues, straightaway a correction.. Dates are: Wed. Nov. 30 - Fri. Dec. 2. With apologies, Eric _______________________________________________ Theory-center mailing list Theory-center(a)nikhef.nl https://mailman.nikhef.nl/mailman/listinfo/theory-center

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[Theory-center] TPP workshop Nov 29 - Dec. 1
by Eric Laenen 15 Aug '11

15 Aug '11

Dear colleagues, as part of the FOM programme on Theoretical Particle Physics in the Era of the LHC (TPP), we intented to hold a workshop around the midterm point of the program. We have now taken preliminary steps for this. Key among these is that Stan Bentvelsen is joining us in this effort, and the workshop will have significant experimentental participation (ATLAS, LHCb, ..). Another is that the dates and location have been fixed. Dates: Wed. Nov. 29 - Friday Dec. 1. Location: Felix Meritis, Amsterdam Please make a note of this in your agenda. More news will follow in early September. Best wishes, Eric _______________________________________________ Theory-center mailing list Theory-center(a)nikhef.nl https://mailman.nikhef.nl/mailman/listinfo/theory-center

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AWG meeting
by Mieke Bouwhuis 03 Aug '11

03 Aug '11

Hello, You can attend the AWG meeting tomorrow (24/3) at 10.00 in H135. Mieke

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Antares-nikhef August 2011