Journal Article

FZJ-2016-00906

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Ab initio alpha–alpha scattering

Elhatisari, S. ; Lee, D. (Corresponding author)FZJ* ; Rupak, G. ; Epelbaum, E.Extern* ; Krebs, H. ; Lähde, T.FZJ* ; Luu, T.FZJ* ; Meissner, U.-G.FZJ*

2015
Nature Publ. Group78092 London [u.a.]

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Please use a persistent id in citations: http://hdl.handle.net/2128/9791  doi:10.1038/nature16067

Abstract: Processes involving alpha particles and alpha-like nuclei comprise a major part of stellar nucleosynthesis and hypothesized mechanisms for thermonuclear supernovae. In an effort towards understanding alpha processes from first principles, we describe in this letter the first ab initio calculation of alpha-alpha scattering. We use lattice effective field theory to describe the low-energy interactions of nucleons and apply a technique called the adiabatic projection method to reduce the eight-body system to an effective two-cluster system. We find good agreement between lattice results and experimental phase shifts for S-wave and D-wave scattering. The computational scaling with particle number suggests that alpha processes involving heavier nuclei are also within reach in the near future.

Keyword(s): Nuclear Physics (2nd)

Note: 6 pages, 6 figures

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Contributing Institute(s):

1. Theorie der Starken Wechselwirkung (IAS-4)
2. Theorie der starken Wechselwirkung (IKP-3)
3. John von Neumann - Institut für Computing (NIC)

Research Program(s):

1. 511 - Computational Science and Mathematical Methods (POF3-511) (POF3-511)
2. NUCLEAREFT - Nuclear Physics from Quantum Chromodynamics (259218) (259218)
3. DFG project 196253076 - TRR 110: Symmetrien und Strukturbildung in der Quantenchromodynamik (196253076) (196253076)
4. HADRONPHYSICS3 - Study of Strongly Interacting Matter (283286) (283286)
5. Nuclear Lattice Simulations (hfz02_20150501) (hfz02_20150501)

Appears in the scientific report 2015

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