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DTSTART:20240101T000000
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DTSTART;TZID=UTC:20240312T160000
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SUMMARY:Speaker: Colin Hill (Columbia) - Title: Uncovering Physics Beyond the Standard Model in the Cosmic Microwave Background
DESCRIPTION:Research Progress Meeting \nDate: March 12\, 2024 \nTime: 4:00- 5:00 pm  \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Colin Hill (Columbia) \nTitle: Uncovering Physics Beyond the Standard Model in the Cosmic Microwave Background \nAbstract: \nThe cosmic microwave background (CMB) anisotropy remains the cleanest\, most powerful probe of fundamental physics in the cosmos. Measurements of the small-scale CMB temperature and polarization fields are set to undergo transformative improvements in the coming decade\, culminating in the CMB-S4 experiment\, which will open new windows into physics beyond the standard models (BSM) of particle physics and cosmology. I will first discuss my ongoing work in the Atacama Cosmology Telescope collaboration focused on cosmological parameter constraints from high-resolution CMB power spectra\, with a particular emphasis on constraining BSM physics operating just prior to recombination\, including new relativistic particles and new pseudo-scalar fields. I will describe high-precision end-to-end tests of our entire analysis pipeline on realistic\, non-Gaussian sky simulations containing all relevant Galactic and extragalactic foregrounds\, tightly coupled to a detailed instrument model. I will then turn to novel searches for BSM physics in CMB secondary anisotropies\, as could be imprinted by the screening of CMB photons by massive dark photons or axion-like particles. I will show the first results of searches for these signals in CMB data\, enabled by my group’s state-of-the-art needlet internal linear combination code. Finally\, I will discuss new analysis methodologies for more optimally cleaning non-Gaussian foregrounds in CMB maps\, with applications to both primordial B-mode searches and small-scale secondary anisotropy measurements. I will conclude with a look ahead to the prospects for BSM physics from the Simons Observatory and CMB-S4. \n\nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/95679892182?pwd=RU5xU2dDRFNabnR1U3pQMklkYWFIdz09 \nMeeting ID: 956 7989 2182 \nPasscode: 169037
URL:https://rpm.physics.lbl.gov/event/speaker-colin-hill-columbia-title-uncovering-physics-beyond-the-standard-model-in-the-cosmic-microwave-background/
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