{"id":1001,"date":"2023-03-08T07:39:36","date_gmt":"2023-03-08T07:39:36","guid":{"rendered":"https:\/\/www.hip.fi\/seminars\/?page_id=1001"},"modified":"2026-10-09T06:09:07","modified_gmt":"2026-10-09T06:09:07","slug":"seminars-2007","status":"publish","type":"page","link":"https:\/\/www.hip.fi\/seminars\/","title":{"rendered":"Seminars"},"content":{"rendered":"<h2>DEPARTMENT OF PHYSICS \/ HIP JOINT COLLOQUIA \/ SEMINARS 2026<em><br \/>\n<\/em><\/h2>\n<ul>\n<li style=\"list-style-type: none\">\n<ul>\n<li><strong>Tuesday 13 October 2026 at 10:15 in A315 and using Zoom: <span data-olk-copy-source=\"MessageBody\">Juan Pablo Garc\u00e9s<\/span> (Heidelberg)<br \/>\n<\/strong><em><span data-olk-copy-source=\"MessageBody\">Asymmetry Sequestering in the Early Universe<\/span><br \/>\nAbstract:\u00a0<\/em><span data-olk-copy-source=\"MessageBody\">In this seminar, I will present different ways in which \u201casymmetry sequestering\u201d can be used to explain the matter-antimatter asymmetry of the Universe. After reviewing the necessary ingredients for baryogenesis and the working principle of the sequestering mechanism behind Dirac leptogenesis, I will proceed to tell a four-chapter story. First, we will explore the possibility that our asymmetric Universe originated from the dynamics of a smooth reheating period.\u00a0Next, we will move beyond the smoothness assumption and see how nonlinear dynamics during preheating can generate an asymmetry,\u00a0as studied through lattice simulations.\u00a0In the third chapter, we will see how the \u201crules of the game\u201d change when replacing some renormalizable operators with higher-dimensional ones. Finally, we\u2019ll ask the question that often comes up in a cosmology seminar: what about dark matter?<\/span><\/li>\n<li><strong>Tuesday 20 October 2026 at 10:15 in A315 and using Zoom: Roman Zwicky (Edinburgh)<br \/>\n<\/strong><em>TBA<br \/>\nAbstract:\u00a0<\/em>TBA<\/li>\n<li><strong>Thursday 22 October 2026 at 10:15 in A315 and using Zoom: Matti Heikinheimo (Helsinki)<br \/>\n<\/strong><em><span data-olk-copy-source=\"MessageBody\">The LZ high energy recoil event and possible dark matter explanations for it<\/span><\/em><strong><br \/>\n<\/strong><em>Abstract:<\/em> <span data-olk-copy-source=\"MessageBody\"> The Lux-Zeplin experiment has observed a single event in a high recoil energy search, with characteristics matching a nuclear recoil of 248 keV. Such an event is not expected from any known backgrounds. I will discuss some dark matter models proposed in the literature that could explain the observation while avoiding a large number of expected events in the low energy region, where none are observed.\u00a0Among those is light dark matter that interacts with the SM via spin and momentum dependent interactions, where the high energy recoil is due to a high velocity component of the DM flux, arising via scattering with energetic cosmic rays.<\/span><\/li>\n<li><strong>Tuesday 27 October 2026 at 10:15 in A315 and using Zoom: D\u00e9bora Mroczek (Turku)<br \/>\n<\/strong><em>TBA<br \/>\nAbstract: <\/em>TBA<\/li>\n<li><strong>Thursday 29 October 2026 at 10:15 in A315 and using Zoom: <span data-olk-copy-source=\"MessageBody\">Guilherme Catumba<\/span> (Milano)<br \/>\n<\/strong><em>The non-perturbative matching of Magnetostatic QCD<\/em><em><br \/>\nAbstract: <\/em><span style=\"font-size: normalsize\">High-temperature QCD can be described, through dimensional reduction, by a series of 3D effective field theories. Electrostatic QCD consists of a gauged-scalar theory, while magnetostatic QCD (MQCD) is a pure 3D gauge theory. The use of dimensionally reduced effective theories to predict 4D observables relies on the matching between the 3D and 4D theories, which, at present, is only known perturbatively.\u00a0 We have devised a strategy to perform a fully non-perturbative matching of QCD\u00a0 and MQCD via lattice simulations.\u00a0 This allows us to assess the accuracy and validity\u00a0 of the effective theory without perturbative uncertainties coming from the matching.\u00a0 In this talk I will explain how the matching is performed over a wide range of temperatures with high precision, while keeping all lattice systematics under control. As a first step in this study, we investigate the matching between the finite temperature pure gauge theory and its 3D counterpart, for which I report some results.<\/span><em><br \/>\n<\/em><\/li>\n<li><strong>Tuesday 3 November 2026 at 10:15 in A315 and using Zoom: Antti Hippel\u00e4inen (Helsinki)<br \/>\n<\/strong><em>TBA<br \/>\nAbstract:\u00a0<\/em>TBA<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><i>Hopefully the up to\u00a0<b>50 min + 10 min discussion long\u00a0<\/b>seminar\/colloquium will be understandable to a wide audience.<br \/>\nContacts: Keijo Kajantie (keijo kajantie at helsinki fi) [ HIP seminar],<br \/>\nTushar Gupta\u00a0 (tushar.gupta at helsinki fi) [<a href=\"http:\/\/www.hip.fi\/cosmoseminars\" target=\"_blank\" rel=\"noreferrer noopener\">cosmo seminar<\/a>]<\/i><\/p>\n<p><i><b>Other related seminars<\/b><\/i><\/p>\n<p><i>Friday 10-12 seminar series in D114: <a href=\"https:\/\/wiki.helsinki.fi\/xwiki\/bin\/view\/Astrophysics\/Astrophysics%20seminar\" target=\"_blank\" rel=\"noopener\">Astrophysics seminar<\/a><\/i><i><br \/>\nMathematical Physics\u00a0<a href=\"https:\/\/www.helsinki.fi\/en\/researchgroups\/mathematical-physics\/seminars-and-workshops\" target=\"_blank\" rel=\"noreferrer noopener\">Seminar and Workshop series<\/a>\u00a0Wed 14-16 in Exactum C123.<br \/>\nInstituteQ <a href=\"https:\/\/instituteq.fi\/news-events\/\" target=\"_blank\" rel=\"noopener\">Events and Seminars<\/a><br \/>\n<\/i><\/p>\n<p><i><b>\u00a0<\/b><\/i><\/p>\n","protected":false},"excerpt":{"rendered":"<p>DEPARTMENT OF PHYSICS \/ HIP JOINT COLLOQUIA \/ SEMINARS 2026 Tuesday 13 October 2026 at 10:15 in A315 and using Zoom: Juan Pablo Garc\u00e9s (Heidelberg) Asymmetry Sequestering in the Early Universe Abstract:\u00a0In this seminar, I will present different ways in which \u201casymmetry sequestering\u201d can be used to explain the matter-antimatter asymmetry of the Universe. After [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1001","page","type-page","status-publish","hentry","post"],"_links":{"self":[{"href":"https:\/\/www.hip.fi\/seminars\/wp-json\/wp\/v2\/pages\/1001","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hip.fi\/seminars\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.hip.fi\/seminars\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.hip.fi\/seminars\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hip.fi\/seminars\/wp-json\/wp\/v2\/comments?post=1001"}],"version-history":[{"count":481,"href":"https:\/\/www.hip.fi\/seminars\/wp-json\/wp\/v2\/pages\/1001\/revisions"}],"predecessor-version":[{"id":1786,"href":"https:\/\/www.hip.fi\/seminars\/wp-json\/wp\/v2\/pages\/1001\/revisions\/1786"}],"wp:attachment":[{"href":"https:\/\/www.hip.fi\/seminars\/wp-json\/wp\/v2\/media?parent=1001"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}