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X-WR-CALNAME:LBNL Physics Division Research Progress Meetings
X-ORIGINAL-URL:https://rpm.physics.lbl.gov
X-WR-CALDESC:Events for LBNL Physics Division Research Progress Meetings
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DTSTART:20230101T000000
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BEGIN:VEVENT
DTSTART;TZID=UTC:20231005T160000
DTEND;TZID=UTC:20231005T170000
DTSTAMP:20260414T184435
CREATED:20231002T165452Z
LAST-MODIFIED:20231002T165452Z
UID:2386-1696521600-1696525200@rpm.physics.lbl.gov
SUMMARY:Speaker: Jure Zupan (University of Cincinnati) - Title: From quarks and gluons to hadrons
DESCRIPTION:Research Progress Meeting \nDate: October 5\, 2023 \nTime: 4:00- 5:00 pm \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Jure Zupan (University of Cincinnati) \nTitle: From quarks and gluons to hadrons\n \nAbstract: Monte Carlo event generators for particle collisions are composed of three block\, the calculations of hard matrix elements\, parton shower\, and hadronization. While the first two are theoretically under good control and systematically improvable using perturbative techniques\, hadronization relies on the use of phenomenological models. I will review the first attempts to use Machine Learning architectures to describe hadronization\, with the ultimate goal to train directly on data. The first practical side product of this effort is an algorithm for faster evaluation of uncertainties associated with the Lund string model implemented in Pythia. \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/98854322464?pwd=K2tKUm1VZjRlV1J5RHE3cXdHQzRxdz09\n\nMeeting ID: 988 5432 2464\n\nPasscode: 142239
URL:https://rpm.physics.lbl.gov/event/speaker-jure-zupan-university-of-cincinnati-title-from-quarks-and-gluons-to-hadrons/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20231012T160000
DTEND;TZID=UTC:20231012T170000
DTSTAMP:20260414T184435
CREATED:20231006T163756Z
LAST-MODIFIED:20231006T163829Z
UID:2390-1697126400-1697130000@rpm.physics.lbl.gov
SUMMARY:Speaker: Luke Kelley (UC Berkeley) - Title: Nanohertz Gravitational Waves: Exploring the most massive black holes in the Universe
DESCRIPTION:Research Progress Meeting \nDate: October 12\, 2023 \nTime: 4:00- 5:00 pm \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Luke Kelley (UC Berkeley) \nTitle: Nanohertz Gravitational Waves: Exploring the most massive black holes in the Universe\n \nAbstract: Earlier this year NANOGrav\, along with other pulsar timing arrays\, announced strong evidence for a stochastic gravitational wave (GW) background at nanohertz frequencies. For decades\, such a signal has been predicted from binaries of supermassive black holes (SMBHs). I will present NANOGrav’s recent data and our interpretation of the signal as produced by SMBH binaries. I will show that these GWs encode a wealth of new information about SMBH formation and evolution. Now\, the race is on for the next expected measurements: detection of anisotropy in the GW background\, and individual loud binaries. These measurements would confirm the origin of the GWs\, provide a crucial testbed for the future LISA mission\, and open a new multi-messenger window into the Universe. \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/98854322464?pwd=K2tKUm1VZjRlV1J5RHE3cXdHQzRxdz09\n\nMeeting ID: 988 5432 2464\n\nPasscode: 142239
URL:https://rpm.physics.lbl.gov/event/speaker-luke-kelley-uc-berkeley-title-nanohertz-gravitational-waves-exploring-the-most-massive-black-holes-in-the-universe/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20231019T160000
DTEND;TZID=UTC:20231019T170000
DTSTAMP:20260414T184435
CREATED:20231016T160040Z
LAST-MODIFIED:20231016T160040Z
UID:2394-1697731200-1697734800@rpm.physics.lbl.gov
SUMMARY:Speaker: Joshua Batson (Anthropic AI) - Title: More is Different: Generalization in Large (Language) Models
DESCRIPTION:Research Progress Meeting \nDate: October 19\, 2023 \nTime: 4:00- 5:00 pm \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Joshua Batson (Anthropic AI) \nTitle: More is Different: Generalization in Large (Language) Models\n \nAbstract: Specialized machine learning models have been successfully applied in science and industry for decades. In recent years\, a new paradigm has emerged: very large models trained on highly diverse training data have demonstrated remarkable capabilities across hundreds of tasks. Many billions of dollars have since been invested in training and deploying such models. In this talk\, I will review some of these developments with a focus on the phenomenon of generalization: as models scale\, what changes? What do we know about the internal functioning of these models and how that emerges during training? What does this portend for the future? I will finally speculate\, with audience participation\, on three potential relationships with physics: the ‘physics’ of model training\, the use of models as scientific assistants\, and the direct use of models to study physical phenomena. \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/98854322464?pwd=K2tKUm1VZjRlV1J5RHE3cXdHQzRxdz09\n\nMeeting ID: 988 5432 2464\n\nPasscode: 142239
URL:https://rpm.physics.lbl.gov/event/speaker-joshua-batson-anthropic-ai-title-more-is-different-generalization-in-large-language-models/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20231026T160000
DTEND;TZID=UTC:20231026T170000
DTSTAMP:20260414T184435
CREATED:20231024T132942Z
LAST-MODIFIED:20231024T132942Z
UID:2398-1698336000-1698339600@rpm.physics.lbl.gov
SUMMARY:Speaker: Kelly Stifter (Fermilab) - Title: Leveraging quantum sensors to shine new light on searches for low-mass dark matter
DESCRIPTION:Research Progress Meeting \nDate: October 26\, 2023 \nTime: 4:00- 5:00 pm \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Kelly Stifter (Fermilab) \nTitle: Leveraging quantum sensors to shine new light on searches for low-mass dark matter\n \nAbstract: While dark matter accounts for approximately 85% of the mass in the universe\, its physical nature remains one of the most pressing open questions in the field of physics. Three decades of experiments have been searching for dark matter interactions over a wide range of candidate dark matter masses and all have come up empty-handed. Nevertheless\, there remain large swaths of unexplored\, well-motivated particle dark matter models that are currently inaccessible through existing detector technologies. One path to probe these remaining particle dark matter models is through the use of low-threshold quantum sensors. In this talk\, I will review the landscape of dark matter direct detection\, outline the potential role of quantum sensors in particle detection\, and detail the early results from a calibration system critical to realizing these individual devices as fully-fledged experiments. \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/98854322464?pwd=K2tKUm1VZjRlV1J5RHE3cXdHQzRxdz09\n\nMeeting ID: 988 5432 2464\n\nPasscode: 142239
URL:https://rpm.physics.lbl.gov/event/speaker-kelly-stifter-fermilab-title-leveraging-quantum-sensors-to-shine-new-light-on-searches-for-low-mass-dark-matter/
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