2019/09/26 by Wael Elkamhawy, Zichao Yang, Hans-Werner Hammer +2 · 15 citations
Chemistry · Mathematics · Physics and Astronomy · #Atomic physics #Bar (unit) #Branching (polymer chemistry) #Branching fraction #Chemistry #Effective field theory #Field (mathematics) #Halo #Mathematics #Nuclear physics #Nuclear physics research studies #Particle physics #Particle physics theoretical and experimental studies #Physics #Proton #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Range (aeronautics) #Resonance (particle physics) #nucl-ex #nucl-th
paper · pdf · doi:10.1016/j.physletb.2021.136610
published in arXiv (Cornell University) (Cornell University) · 7 pages, 4 figures; discussion expanded, accepted for publication in Phys. Lett. B
openalex publication_date 2019/09/26 · arxiv created 2021/09/10 · arxiv updated 2021/09/13 · openalex created_date 2021/09/13 · openalex updated_date 2026/08/06
We calculate the rate of the rare decay 11Be into 10Be + p +e- + νe using Halo effective field theory, thereby describing the process of beta-delayed proton emission. We assume a shallow 1/2+ resonance in the 10Be-p system with an energy consistent with a recent experiment by Ayyad et al. and obtain bp = 4.9-2.9+5.6(exp.)-0.8+4.0(theo.) × 10-6 for the branching ratio of this decay, predicting a resonance width of ΓR = (9.0+4.8-3.3(exp.)+5.3-2.2(theo.))~keV. Our calculation shows that the experimental branching ratio and resonance parameters of Ayyad et al. are consistent with each other. Moreover, we analyze the general impact of a resonance on the branching ratio and demonstrate that a wide range of combinations of resonance energies and widths can reproduce branching ratios of the correct order. Thus, no exotic mechanism (such as beyond the standard model physics) is needed to explain the experimental decay rate.