2008/01/28 by Shung-Ichi Ando, S. Ando, Jae Won Shin +6 · 2 citations
Physics and Astronomy · #Neutrino Physics Research #Nuclear physics research studies #Quantum Chromodynamics and Particle Interactions #astro-ph #hep-ph #nucl-th
paper · pdf · doi:10.1016/j.physletb.2008.08.040
published as Phys.Lett.B668:187-192,2008 · 14 pages, 5 eps figures
arxiv created 2008/01/28 · openalex publication_date 2008/08/29 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The proton-proton fusion reaction, pp→ de+ν, is studied in pionless effective field theory (EFT) with di-baryon fields up to next-to leading order. With the aid of the di-baryon fields, the effective range corrections are naturally resummed up to the infinite order and thus the calculation is greatly simplified. Furthermore, the low-energy constant which appears in the axial-current-di-baryon-di-baryon contact vertex is fixed through the ratio of two- and one-body matrix elements which reproduces the tritium lifetime very precisely. As a result we can perform a parameter free calculation for the process. We compare our numerical result with those from the accurate potential model and previous pionless EFT calculations, and find a good agreement within the accuracy better than 1%.