Bulletin of the American Physical Society
22nd Annual Meeting of the APS Northwest Section
Volume 67, Number 5
Friday–Saturday, June 3–4, 2022; Thompson Rivers University, Kamloops, British Columbia, Canada
Session M01: Contributed II
1:30 PM–2:18 PM,
Saturday, June 4, 2022
Abstract: M01.00002 : First principles calculations of 7Li+p radiative capture*
1:42 PM–1:54 PM
Presenter:
Peter H Gysbers
(University of British Columbia / TRIUMF)
Authors:
Peter H Gysbers
(University of British Columbia / TRIUMF)
Petr Navratil
(TRIUMF)
Using chiral nucleon-nucleon and three-nucleon forces as input, the no-core shell model with continuum technique allows us to obtain an accurate description of both 8Be bound states and p+7Li scattering states.
We investigate scattering, transfer and capture reactions with 8Be as the composite state and compare the cross-sections to data.
The energy freed up by capture is enough to produce electron-positron pairs. The angular distribution of these pairs will be different if the intermediate particle is a massive beyond-the-standard-model particle rather than the photon, for example, the axion or an axial vector boson.
Computing the standard model background and comparing experimental data with new decay modes is necessary to support or rule out new physics in the ATOMKI anomaly (which posits the existence of a new boson with a mass of 17 MeV).
*Supported by the NSERC grants No. SAPIN-2016-00033 and No. PGSD3-535536-2019.TRIUMF receives federal funding via a contribution agreement with the National Research Council of Canada.
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