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DTSTART;TZID=America/Chicago:20260413T160000
DTEND;TZID=America/Chicago:20260413T170000
DTSTAMP:20260413T145310Z
SUMMARY:HEP Seminar: Gustavo F. S. Alves: "Open System Approach to Neutrinos Propagating in an Ultralight Scalar Background"
UID:641614@northwestern.edu
TZID:America/Chicago
DESCRIPTION:We examine decoherence in neutrino oscillations induced by an ultralight scalar field coupled to neutrinos. The scalar induces time- and position-dependent shifts in the neutrino mass matrix. Neutrinos sample different field configurations throughout an experimental data-taking period\, which leads to damping effects in the oscillation pattern in the form of decoherence. By recasting the neutrino-scalar dynamics within the open quantum systems framework\, we establish a mapping between a complete model and phenomenological decoherence approaches. We find that the parameter driving decoherence scales as $L^2/E^2$\, where $L$ is the baseline and $E$ is the neutrino energy\, as opposed to $L/E$ typically assumed in phenomenological studies of open system approaches to neutrino oscillations.  Gustavo F. S. Alves\, Postdoctoral Scholar\, Northwestern University  Host: Adrian Thompson
LOCATION:Technological Institute\, F160\, 2145 Sheridan Road\, Evanston\, IL 60208
TRANSP:OPAQUE
URL:https://planitpurple.northwestern.edu/event/641614
CREATED:20241011T050000Z
STATUS:CONFIRMED
LAST-MODIFIED:20260410T162554Z
PRIORITY:0
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