Antares-nikhef January 2012

antares-nikhef@nikhef.nl

4 participants
4 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 this friday, Jan. 20
by Eric Laenen 18 Jan '12

18 Jan '12

Dear colleagues, a reminder that a Theory Center Meeting is scheduled for next friday, 20-1-2012, in Nikhef. As usual, please register at http://www.nikhef.nl/pub/theory/registration/index.php See below for the agenda. I look forward to see you there. Best wishes, Eric Agenda Jan. 20 - Time: 10.00 - 17.00 - Talk 10.30-11.00, H320 Asmita Mukherjee "Gluonic Pole Matrix Element and Universality of Fragmentation Functions" - Time: 15.00 - 16.00 Student meeting/discussion Jacob Noordmans (RuG/KvI): "Aspects of Lorentz symmetry" Lorentz symmetry is an almost indisputable part of our theories of nature. And an experimentally very well tested part at that. It is nonetheless important to keep testing this symmetry, exactly because we rely so heavily on it in our description of nature. In this student-talk I will try to shine some light on different aspects of Lorentz symmetry: some of its consequences, its connection to CPT, what happens if we break it and how can we test it? - Talk 16.30-17.00, H320 Ioannis Malamos (RU Nijmegen) "Reduction of one and two-loop Amplitudes at the Integrand level" We define the order of a Feynman integral by the number of its denominators (propagators). We then discuss reduction of Feynman integrals at the integrand level at one and two-loop cases. At one-loop level such reductions are known and we just present them with a different approach. At the two-loop level this subject is under investigation since a base for Feynman integrals is not known in advance. However, we explain how one can arrive at such a reduction in a general case. - 17.00 Borrel _______________________________________________ Theory-center mailing list Theory-center(a)nikhef.nl https://mailman.nikhef.nl/mailman/listinfo/theory-center

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Birthday tea, cookies, chocolate @ 3 in my office
by Jeroen Snijdewint 16 Jan '12

16 Jan '12

Title says it all ^_^ Cheers, Jeroen

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coming shits
by Claudio Bogazzi 13 Jan '12

13 Jan '12

Dear all, First I would like to remind you the coming shits (from the previous shift list): February 2nd: Maarten - Mieke February 9th: Tri - Erwin February 16th: ??? - Tri (but I believe that our friend Tri already did too many shifts so a volunteer would be more than welcome...) March 29th: Erwin - Claudio Now, please have a look at the new shift list: https://sbgelog.in2p3.fr/shiftlist_2012_2013/ The shifters name are random, i.e. we can always change it according to the personal availability. These are the dates (unfortunately it turns out it was impossible to fill 3-4 consecutive slots): 26th April 21st June (dibs!) 2nd August 27th September 18th October 22nd November 7th March 2013 28th March 2013 Cheers, Claudio -- Claudio Bogazzi, PhD. Student, FOM Institute/NIKHEF Amsterdam Address: Dirk van Hasseltssteeg 26B 1012 NE, Amsterdam The Netherlands Office Phone: +31 20 5925095 Portable Phone: +31 639656573 +39 3287081165

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Antares-nikhef January 2012