HIP NEWS February 27th 2017
DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
Monday 27 February 2017 at 14.15 in E206
Nora Brambilla (TU München)
Quarkonium with Effective field theories
Abstract: Quantum Chromodynamics (QCD) is the sector of the Standard Model of particle physics that describes the strong interaction, deceptively simple to formulate but notoriously difficult to solve. Heavy quarkonium is a multiscale system that probes the different energy regimes of QCD, from the high-energy region, where an expansion in the coupling constant is possible and precision studies may be done, to the low-energy region, dominated by confinement and the many manifestations of the nonperturbative strong dynamics. Properties of production and absorption of quarkonium in a medium are also crucial for the study of QCD at high density and temperature. On the theoretical side, the construction of new nonrelativistic effective field theories for quarkonium has recently revolutionized the field providing both a conceptual framework and a powerful calculational tool. On the experimental side, the diversity, quantity and accuracy of the data collected in the last few years at B and tau-charm factories and at RHIC and LHC experiments is impressive, featuring the observation of new states and new unexpected processes. I will discuss these theoretical and experimental advancements and their implications for our understanding of strong interactions.
Tuesday 28 February 2017 at 10.15 in A315
Antonio Vairo (TU München)
Heavy Majorana neutrino production and decay in the hot early universe
Abstract: We compute thermal corrections to the production rate and CP asymmetry of heavy Majorana neutrinos in leptogenesis models of the early universe. We consider temperatures larger than the electroweak scale but smaller than the neutrino masses so that the computation may be performed in a non-relativistic effective field theory framework. We discuss different arrangements of the Majorana neutrino masses.
Wednesday 1 March 2017 at 14.15 in A315
Alexandre Barreira (MPA Garching)
Observational signatures of non-GR theories of gravity in cosmology.
Abstract: In this talk, I will use cosmological simulations to look into a few of the imprints that departures from GR can leave on cosmological observables. By using the simulation results we can construct controlled galaxy mock catalogues, which we can/should use to validate current data analysis methods, as well as to investigate the merits of new ways to constrain gravity. Specifically, I will test the validity of current redshift space distortion analysis pipelines in estimating the growth rate of structure in non-GR cosmologies. I will also show how departures from GR affect the lensing signal along underdense lines-of-sight (called troughs), for which the Dark Energy Survey has already provided the first measurements.
GRANTS FOR UNIVERSITY OF HELSINKI RESEARCHERS
Grants for three-year research projects for funding period 2018–2020 are intended for promising researchers of the University of Helsinki. The funding is aimed to support future research leaders who are starting to conduct independent research and establishing a research group at the University of Helsinki.
The deadline for letters of intent is Tuesday, 28 February 2017 at 3:00 pm.
More information and application instructions: https://flamma.helsinki.fi/en/HY360971
A. Barreira 28.2. – 3.3. (FM)
N Brambilla 26.2. – 28.2. (AV)
P. Dendooven 7.2. – 7.4.
A. Vairo 26.2. – 28.2. (AV)