$pp \to ppπ^0$ near threshold in pionless effective theory

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/193130The total cross section of the $pp\to ppπ^0$ reaction near threshold is calculated in pionless effective field theory with a di-baryon and external pions. The amplitudes for a leading one-body and subleading contact neutral pion production vertex are obtained including the initial and final state interactions. After estimating a low-energy constant in the contact vertex, we compare our results for the total cross section with the experimental data.15 pages, 7 figures; 6 references added, minor revisionNuclear TheoryHigh Energy Physics - Phenomenology$pp \to ppπ^0$ near threshold in pionless effective theorytext