caa a22 4500 445873353 CHVBK 20180317145519.0 cr unu---uuuuu 170323e20111101xx s 000 0 eng 10.1140/epja/i2011-11142-0 doi (NATIONALLICENCE)springer-10.1140/epja/i2011-11142-0 Coupled-channel effective field theory and proton- 7Li scattering [Elektronische Daten] [V. Lensky, M. Birse] We apply the renormalisation group (RG) to analyse scattering by short-range forces in systems with coupled channels. For two S -wave channels, we find three fixed points, corresponding to systems with zero, one or two bound or virtual states at threshold. We use the RG to determine the power countings for the resulting effective field theories. In the case of a single low-energy state, the resulting theory takes the form of an effective-range expansion in the strongly interacting channel. We also extend the analysis to include the effects of the Coulomb interaction between charged particles. The approach is then applied to the coupled p + ^7Li and$n + $7Be channels which couple to a J P = 2- state of 8Be very close to the n + ^7Be threshold.Atnext - to - leadingorder, weareabletogetagooddescriptionofthe$p + $7Li phase shift and the 7Be$(n, p)$7Li cross-section using four parameters. Fits at one order higher are similarly good but the available data are not sufficient to determine all five parameters uniquely. SIF, Springer-Verlag Berlin Heidelberg, 2011 Lensky V. Theoretical Physics Group, School of Physics and Astronomy, University of Manchester, M13 9PL, Manchester, UK aut Birse M. Theoretical Physics Group, School of Physics and Astronomy, University of Manchester, M13 9PL, Manchester, UK aut The European Physical Journal A Springer Berlin Heidelberg 47/11(2011-11-01), 1-10 1434-6001 47:11<1 2011 47 10050 https://doi.org/10.1140/epja/i2011-11142-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1140/epja/i2011-11142-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lensky V. Theoretical Physics Group, School of Physics and Astronomy, University of Manchester, M13 9PL, Manchester, UK aut NATIONALLICENCE 700 1- Birse M. Theoretical Physics Group, School of Physics and Astronomy, University of Manchester, M13 9PL, Manchester, UK aut NATIONALLICENCE 773 0- The European Physical Journal A Springer Berlin Heidelberg 47/11(2011-11-01), 1-10 1434-6001 47:11<1 2011 47 10050 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer