14th Conference on Theoretical Nuclear Physics in Italy | |
The proton-proton weak capture reaction within chiral effective field theory | |
Marcucci, Laura E.^1 | |
Department of Physics E. Fermi, University of Pisa, INFN-Pisa, 56127 Pisa, Italy^1 | |
关键词: Astrophysical S factors; Capture reaction; Chiral effective-field theory; Electromagnetic interactions; Matrix elements; Next to next to leading orders; Proton channels; Relative energies; | |
Others : https://iopscience.iop.org/article/10.1088/1742-6596/527/1/012023/pdf DOI : 10.1088/1742-6596/527/1/012023 |
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来源: IOP | |
【 摘 要 】
We review the results of the most recent calculation for the astrophysical S-factor of the weak proton-proton capture reaction, over a range for the center-of-mass relative energy of 0-100 keV. The so-called chiral effective field theory approach is used, where the chiral two- nucleon potential is derived up to next-to-next-to-next-to leading order and is augmented by the full electromagnetic interaction. The low-energy constants (LEC's) entering the weak current operators are fixed so as to reproduce the A 3 binding energies and magnetic moments, and the Gamow-Teller matrix element in tritium β-decay. Contributions from S and P partial waves in the incoming two-proton channel are retained. The S-factor at zero energy is found to be ∼1% larger than the value reported in the literature, mostly due to the P-waves contributions.
【 预 览 】
Files | Size | Format | View |
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The proton-proton weak capture reaction within chiral effective field theory | 638KB | download |