$pp \to pp\pi^0$ near threshold in pionless effective theory
Shung-ichi Ando (Sungkyunkwan U.)
TL;DR
This paper calculates the total cross section for the proton-proton to proton-proton neutral pion reaction near threshold using pionless effective field theory, incorporating initial and final state interactions and comparing with experimental data.
Contribution
It introduces a pionless effective field theory approach with di-baryon and external pions to analyze near-threshold pion production in proton-proton collisions.
Findings
Calculated total cross section matches experimental data
Identified low-energy constant in contact vertex
Included initial and final state interactions
Abstract
The total cross section of the 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.
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