- Tuesday 26 May 2020 at 10.15 using Zoom: Niels Schlusser (Darmstadt)
Jet momentum broadening from the lattice
Abstract: The transverse momentum of a high-energy particle broadens in crossing a strongly interacting medium. The transverse collision kernel, C(b), quantifies that phenomenon and receives dominant infrared contributions which cannot be tackled perturbatively, although the coupling seems small. We calculated this contribution on the lattice in Electrostatic QCD as proposed by Caron-Huot and pioneered by Panero, Rummukainen, and Schäfer. Our continuum-extrapolated data, provided at four different temperatures, renders the common quadratic approximation of C(b) redundant.
- Tuesday 2 June 2020 at 10.15 using Zoom: Jere Remes (Helsinki)
V-QCD and neutron stars
Abstract:In this talk, we consider a family of state-of-the-art holographic models called Veneziano-QCD, phenomenologically tuned to mimic QCD.These models are combined “continuously” with various ab-initio nuclear physics models used to describe low density nuclear matter, with V-QCD being used for high density nuclear matter as well as for quark matter. We examine the constraints from astrophysical observations on these hybrid equations of state and the implications on the structure of compact stars.
- Tuesday 25 August 2020 at 10.15 in A315: Kazuo Fujikawa (RIKEN)
- Tuesday 22 September 2020 at 10.15 in A315: Maurizio Piai (Swansea)
Higgs Compositeness and Beyond the Standard Model Physics
Abstract: Appealing solutions to the hierarchy problem of the Standard Model involve assuming that the Higgs particle might be composite, and originates from new strong dynamics. This general scenario has a number of concrete possible realisations, and their study requires non-perturbative theoretical methods. I illustrate a selection of three such possibilities, via examples of calculations that use gauge-gravity dualities, lattice gauge theories and effective field theories, respectively.
Hopefully the up to 50 min + 10 min discussion long seminar/colloquium will be understandable to a wide audience.New Nordic series of seminars over the web, link: https://sites.google.com/view/nordictheory/home
Contacts: Keijo Kajantie (keijo kajantie at helsinki fi) [ HIP seminar],
Sofie Koksbang (sofie koksbang at helsinki fi) [cosmo seminar]
For more information, and to subscribe to email announcements, contact Oscar Henriksson (oscar henriksson at helsinki fi)
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