Bulletin of the American Physical Society
APS April Meeting 2019
Volume 64, Number 3
Saturday–Tuesday, April 13–16, 2019; Denver, Colorado
Session H14: Mini-Symposium:The Neutron Lifetime Anomaly - possible explanations
10:45 AM–12:21 PM,
Sunday, April 14, 2019
Sheraton
Room: Plaza Court 3
Sponsoring
Unit:
DNP
Chair: Chris Wrede, Michigan State University
Abstract: H14.00001 : Neutron Dark Decay*
10:45 AM–11:21 AM
View Presentation Abstract
Presenter:
Bartosz Fornal
(University of California, San Diego)
Author:
Bartosz Fornal
(University of California, San Diego)
Collaboration:
In collaboration with Benjamin Grinstein.
I will discuss the recently proposed dark matter interpretation of the neutron lifetime discrepancy. The difference between bottle and beam neutron lifetime measurements is explained by the existence of a neutron dark decay channel with a branching fraction 1%. Phenomenologically consistent particle physics models of this type can be constructed; they involve either a strongly self-interacting dark sector or a repulsive dark matter-baryon interaction. I will elaborate on the theoretical developments around this idea and describe the efforts undertaken to verify it experimentally. In general, the proposed neutron dark decay need not be linked to the neutron lifetime discrepancy and can occur at a smaller rate, giving rise to new theoretical and experimental avenues of investigation.
*Research supported in part by the DOE Grant No. DE-SC0009919.
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