{ "150759-21910119": { "datetime_modified":"20260824T074720", "datetime_start":"20260914T150000", "datetime_end":"20260914T160000", "has_end_time":1, "date_start":"2026-09-14", "date_end":"2026-09-14", "time_start":"15:00:00", "time_end":"16:00:00", "time_zone":"America\/Detroit", "event_title":"HEP-Astro Seminar | Illuminating the Dark Sector with Strong Gravitational Lensing", "occurrence_title":"", "combined_title":"HEP-Astro Seminar | Illuminating the Dark Sector with Strong Gravitational Lensing: Cian Roche (MIT)", "event_subtitle":"Cian Roche (MIT)", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"Gravitational lensing is a tool uniquely suited to studying the dark sector. Because its observable properties depend on all mass between the observer and source, regardless of how that mass interacts with light, lensing enables the study of total mass distributions from subplanetary to cosmological scales. To interpret strong lensing observations in the context of dark sector physics, they must typically be compared to cosmological simulations. This comparison is particularly challenging for the cluster strong lensing problem due to the simultaneous requirements for large simulation volume and high resolution, and the large modeling effort required for each lensing system. As a result, most existing constraints from strong lensing rely on analytic approximations, or theoretical predictions that do not account for effects such as line-of-sight structure, selection effects, or the systematics of mass modeling in observations. In this talk I will discuss how we can bridge the gap between observations and cosmological simulations, using a particular tension in the abundance of galaxy-galaxy strong lenses in cluster fields as an illustrative example. I will then discuss what the future holds for dark sector inference as JWST, Euclid, LSST, and Roman revolutionize both the resolution and statistical power of strong lensing observables.", "occurrence_notes":null, "guid":"150759-21910119@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/150759", "building_id":"1000167", "building_name":"West Hall", "campus_maps_id":"163", "room":"340", "location_name":"West Hall", "has_livestream":0, "cost":"", "tags":["Physics","Science"], "website":"", "sponsors":[ { "group_name":"HEP - Astro Seminars", "group_id":"3799", "website":"" } ], "image_url":"", "styled_images":{ "event_thumb":"", "event_large":"", "event_large_2x":"", "event_large_lightbox":"", "group_thumb":"", "group_thumb_square":"", "group_large":"", "group_large_lightbox":"", "event_large_crop":"", "event_list":"", "event_list_2x":"", "event_grid":"", "event_grid_2x":"", "event_feature_large":"", "event_feature_thumb":"" }, "occurrence_count":1, "first_occurrence":21910119 } , "151197-21911058": { "datetime_modified":"20260831T094544", "datetime_start":"20260921T150000", "datetime_end":"20260921T160000", "has_end_time":1, "date_start":"2026-09-21", "date_end":"2026-09-21", "time_start":"15:00:00", "time_end":"16:00:00", "time_zone":"America\/Detroit", "event_title":"HEP-Astro Seminar | Flavor Dependent Jet Fragmentation and Open Science at LHCb", "occurrence_title":"", "combined_title":"HEP-Astro Seminar | Flavor Dependent Jet Fragmentation and Open Science at LHCb: Dillon Fitzgerald (U-M Physics)", "event_subtitle":"Dillon Fitzgerald (U-M Physics)", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"One of the remaining mysteries of the Standard Model is how emergent properties of hadronic matter arise from quark and gluon degrees of freedom. For example, there is still much to be learned about the process by which hadrons are formed from color charged quarks and gluons (hadronization). The LHCb detector offers a unique opportunity to study this process in terms of the flavor of quarks involved in the hard scatterin process, enabling measurements of the fragmentation process in heavy flavor jets with unprecedented precision. The unique features of these data motivate both a substantial effort to extract high precision measurements of heavy and light flavor jets, as well as an effort to preserve and provide open access to these data for the physics and data science communities to explore. In this talk, I will review recent jet fragmentation function measurements from LHCb in comparison to global measurements. I will then briefly cover the LHCb open data efforts, culminating in the review of a publicly available dataset and analysis workflow enabling exploration of the jet fragmentation process at LHCb.", "occurrence_notes":null, "guid":"151197-21911058@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/151197", "building_id":"1000167", "building_name":"West Hall", "campus_maps_id":"163", "room":"340", "location_name":"West Hall", "has_livestream":0, "cost":"", "tags":["Physics","Science"], "website":"", "sponsors":[ { "group_name":"HEP - Astro Seminars", "group_id":"3799", "website":"" } ], "image_url":"", "styled_images":{ "event_thumb":"", "event_large":"", "event_large_2x":"", "event_large_lightbox":"", "group_thumb":"", "group_thumb_square":"", "group_large":"", "group_large_lightbox":"", "event_large_crop":"", "event_list":"", "event_list_2x":"", "event_grid":"", "event_grid_2x":"", "event_feature_large":"", "event_feature_thumb":"" }, "occurrence_count":1, "first_occurrence":21911058 } , "150108-21908018": { "datetime_modified":"20260811T074607", "datetime_start":"20260928T150000", "datetime_end":"20260928T160000", "has_end_time":1, "date_start":"2026-09-28", "date_end":"2026-09-28", "time_start":"15:00:00", "time_end":"16:00:00", "time_zone":"America\/Detroit", "event_title":"HEP-Astro Seminar", "occurrence_title":"", "combined_title":"HEP-Astro Seminar: Lina Necib (MIT)", "event_subtitle":"Lina Necib (MIT)", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"TBA", "occurrence_notes":null, "guid":"150108-21908018@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/150108", "building_id":"1000167", "building_name":"West Hall", "campus_maps_id":"163", "room":"340", "location_name":"West Hall", "has_livestream":0, "cost":"", "tags":["Physics","Science"], "website":"", "sponsors":[ { "group_name":"HEP - Astro Seminars", "group_id":"3799", "website":"" } ], "image_url":"", "styled_images":{ "event_thumb":"", "event_large":"", "event_large_2x":"", "event_large_lightbox":"", "group_thumb":"", "group_thumb_square":"", "group_large":"", "group_large_lightbox":"", "event_large_crop":"", "event_list":"", "event_list_2x":"", "event_grid":"", "event_grid_2x":"", "event_feature_large":"", "event_feature_thumb":"" }, "occurrence_count":1, "first_occurrence":21908018 } , "150585-21909678": { "datetime_modified":"20260820T093542", "datetime_start":"20261005T150000", "datetime_end":"20261005T160000", "has_end_time":1, "date_start":"2026-10-05", "date_end":"2026-10-05", "time_start":"15:00:00", "time_end":"16:00:00", "time_zone":"America\/Detroit", "event_title":"HEP-Astro Seminar", "occurrence_title":"", "combined_title":"HEP-Astro Seminar: Bryce Littlejohn (Illinois Institute of Technology)", "event_subtitle":"Bryce Littlejohn (Illinois Institute of Technology)", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"TBA", "occurrence_notes":null, "guid":"150585-21909678@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/150585", "building_id":"1000167", "building_name":"West Hall", "campus_maps_id":"163", "room":"340", "location_name":"West Hall", "has_livestream":0, "cost":"", "tags":["Physics","Science"], "website":"", "sponsors":[ { "group_name":"HEP - Astro Seminars", "group_id":"3799", "website":"" } ], "image_url":"", "styled_images":{ "event_thumb":"", "event_large":"", "event_large_2x":"", "event_large_lightbox":"", "group_thumb":"", "group_thumb_square":"", "group_large":"", "group_large_lightbox":"", "event_large_crop":"", "event_list":"", "event_list_2x":"", "event_grid":"", "event_grid_2x":"", "event_feature_large":"", "event_feature_thumb":"" }, "occurrence_count":1, "first_occurrence":21909678 } }