Bulletin of the American Physical Society
6th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Sunday–Friday, November 26–December 1 2023; Hawaii, the Big Island
Session L11: Physics Beyond the Standard Model I
9:00 AM–12:00 PM,
Friday, December 1, 2023
Hilton Waikoloa Village
Room: Kings 1
Chair: Wouter DEKENS, Institute for Nuclear Theory
Abstract: L11.00001 : Constraining Baryon Number Violation with Neutron Stars, Probing Dark Sectors*
9:00 AM–9:15 AM
Presenter:
Susan V Gardner
(University of Kentucky)
Authors:
Jeffrey Berryman
(University of California, Berkeley; University of Washington; Virginia Polytechnic University)
Susan V Gardner
(University of Kentucky)
Mohammadreza Zakeri
(University of Kentucky)
The very existence of neutron stars constrains the strength of such effects, and in this talk I develop how precisely determined
energy-loss constraints, particularly anomalous binary-pulsar period lengthening, limit not only the total baryon loss rate across
the star but also the parameters of the particle physics models that produce such loss. To do this, we compute the new processes
in the dense nuclear medium found at the core of a neutron star, employing the techniques of relativistic mean-field theory.
Focusing on scenarios in which the dark-sector particles do not accumulate in the star, we extract limits on in-vacuum
baryon-number-violating processes, and we determine them for various equations of state. I conclude by noting the implications
of our results for models of dark-sector-enabled baryogenesis.
*I acknowledge partial support from the U.S. Department of Energy under contract DE-FG02-96ER40989.
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