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DTSTAMP:20261102T091118
DTSTART;TZID=America/Detroit:20261109T150000
DTEND;TZID=America/Detroit:20261109T160000
SUMMARY:Workshop / Seminar:HEP-Astro Seminar | The galaxy's history under our feet: paleo-detection of cosmic rays with PRimuS
DESCRIPTION:The sources and history of cosmic rays are largely unknown because of the intrinsic deflection and delay imposed by cosmic magnetic fields. Minerals might offer a way to investigate this mystery from the rock record\, as they preserve the damage tracks of the particles that crossed them over their geological history. This idea\, known as paleo-detection\, is mostly known for rare-event searches\, such as WIMP recoils and neutrino interactions\, where nanometre-scale tracks and the need for ultraclean minerals require a demanding readout. Cosmic rays are the opposite case: the signal is expected to be abundant\, and the micron-to-tens-of-micron tracks can be revealed with simple etching and optical microscopy. \n\nI will present the simulation framework we built to predict the track-length spectrum for a given mineral and flux history. It combines MCEq and Geant4\, follows the overburden history of the sample\, and folds in detection efficiency and measurement effects. I will then show how these predictions are confronted with data in PRImuS\, our experimental proof of concept: chemical etching of obsidian\, argon-plasma etching of halite\, automated optical microscopy\, and OptimusPrimus\, a deep-learning tool for track recognition. The pipeline is validated on obsidian\, and its application to halite is the next step. I will conclude with the outlook toward the possible GALACTIC project\, based on light-sheet microscopy.
UID:154409-21917688@events.umich.edu
URL:https://events.umich.edu/event/154409
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Physics,Science
LOCATION:West Hall - 340
CONTACT:
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DTSTAMP:20261103T124437
DTSTART;TZID=America/Detroit:20261116T150000
DTEND;TZID=America/Detroit:20261116T160000
SUMMARY:Workshop / Seminar:HEP-Astro Seminar | HEP-Astro Seminar | Flavor Dependent Jet Fragmentation and Open Science at LHCb
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 scattering 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.
UID:154489-21917808@events.umich.edu
URL:https://events.umich.edu/event/154489
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Physics,Science
LOCATION:West Hall - 340
CONTACT:
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