HIP NEWS April 4th 2016
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DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Monday 4 April 2016 at 10.15 in A315 Note Day!
Mirko Berretti (HIP/Totem)
Exclusive processes with TOTEM and CT-PPS: results, perspectives and experimental challenges
Abstract: The latest results and the physics potential of the TOTEM experiment at the LHC will be presented. This include searches for glueballs and new physics together with CMS and a deeper understanding of elastic scattering. For LHC RUN-2, a joint CMS-TOTEM project (CT-PPS) has been approved to study exclusive particle production at the highest LHC luminosity. With the recent indication by the CMS and ATLAS experiments of a possible resonance in the 750 GeV mass region, the CT-PPS, initially designed to search for anomalous gauge boson quartic couplings, will give a relevant contribution in a possible confirmation and study of this new resonance. I will review the CT-PPS status and plans for 2016 LHC running.
In the second part of the seminar I will concentrate on the new detectors designed to precisely measure the time-of-flight of the scattered protons produced in such exclusive processes at medium and high luminosity to be able to reject pile-up. Timing detectors based on diamond sensors have been developed by TOTEM and will be used in the first phase of the CT-PPS project. I will summarize the detector development, performance and perspective for this promising technology.
COSMO-seminar
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Wednesday 6 April 2016 at 14.15 in A315
Maria Archidiacono (Aachen University)
Efficient calculation of cosmological neutrino clustering
Abstract: Within the next few years cosmological structure formation will be probed in greater detail than ever before by new and very large surveys, most notably EUCLID and LSST. While this opens great possibilities for probing for example dark energy and the mass of neutrinos, it also puts very stringent requirements on theoretical calculations of cosmological observables, such as the matter power spectrum. In this regard, the treatment of massive neutrino is particularly challenging both in N-body simulations and in linear theory Boltzmann codes. In this talk I will present a new approximation to the third moment of the Boltzmann hierarchy and demonstrate that with this new approximation the neutrino power spectrum can be calculated with a precision of a few percent. Then I will discuss an extremely efficient way of calculating the neutrino power spectrum in the regime of non-linear dark matter clustering.
Wednesday 13 April 2016, Upcoming events for international staff
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Sign up in http://www.helsinki.fi/trainingcalendar ( Staff Training Calendar HENKKA) or via https://elomake.helsinki.fi/lomakkeet/48601/lomake.html
Visitors
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M. Archidiacono 5.4. – 8.4. (FM)
P. Dendooven 24.2. – 6.4.
G. Moore 13.4. – 15.4. (AV)