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000828263 005__ 20240610120943.0
000828263 0247_ $$2arXiv$$aarXiv:1702.05319
000828263 0247_ $$2Handle$$a2128/15008
000828263 037__ $$aFZJ-2017-02231
000828263 041__ $$aEnglish
000828263 1001_ $$0P:(DE-HGF)0$$aAlarcón, Jose Manuel$$b0$$eCorresponding author
000828263 245__ $$aNeutron-proton scattering at next-to-next-to-leading order in Nuclear Lattice Effective Field Theory
000828263 260__ $$c2017
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000828263 3367_ $$2BibTeX$$aARTICLE
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000828263 500__ $$a22 pages, 8 figures
000828263 520__ $$aWe present a systematic study of neutron-proton scattering in Nuclear Lattice Effective Field Theory (NLEFT), in terms of the computationally efficient radial Hamiltonian method. Our leading-order (LO) interaction consists of smeared, local contact terms and static one-pion exchange. We show results for a fully non-perturbative analysis up to next-to-next-to-leading order (NNLO), followed by a perturbative treatment of contributions beyond LO. The latter analysis anticipates practical Monte Carlo simulations of heavier nuclei. We explore how our results depend on the lattice spacing a, and estimate sources of uncertainty in the determination of the low-energy constants of the next-to-leading-order (NLO) two-nucleon force. We give results for lattice spacings ranging from a = 1.97 fm down to a = 0.98 fm, and discuss the effects of lattice artifacts on the scattering observables. At a = 0.98 fm, lattice artifacts appear small, and our NNLO results agree well with the Nijmegen partial-wave analysis for S-wave and P-wave channels. We expect the peripheral partial waves to be equally well described once the lattice momenta in the pion-nucleon coupling are taken to coincide with the continuum dispersion relation, and higher-order (N3LO) contributions are included. We stress that for center-of-mass momenta below 100 MeV, the physics of the two-nucleon system is independent of the lattice spacing.
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000828263 536__ $$0G:(GEPRIS)196253076$$aDFG project 196253076 - TRR 110: Symmetrien und Strukturbildung in der Quantenchromodynamik (196253076)$$c196253076$$x1
000828263 588__ $$aDataset connected to arXivarXiv
000828263 7001_ $$0P:(DE-Juel1)161155$$aDu, Dechuan$$b1$$ufzj
000828263 7001_ $$0P:(DE-HGF)0$$aKlein, Nico$$b2$$eCorresponding author
000828263 7001_ $$0P:(DE-Juel1)145995$$aLähde, Timo$$b3$$ufzj
000828263 7001_ $$0P:(DE-Juel1)156278$$aLee, Dean$$b4$$ufzj
000828263 7001_ $$0P:(DE-Juel1)159474$$aLi, Ning$$b5$$eCorresponding author$$ufzj
000828263 7001_ $$0P:(DE-Juel1)159199$$aLu, Bingnan$$b6$$ufzj
000828263 7001_ $$0P:(DE-Juel1)159481$$aLuu, Tom$$b7$$ufzj
000828263 7001_ $$0P:(DE-Juel1)131252$$aMeissner, Ulf-G.$$b8$$ufzj
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000828263 9101_ $$0I:(DE-HGF)0$$6P:(DE-HGF)0$$aUniversität Bonn$$b0
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000828263 9101_ $$0I:(DE-HGF)0$$6P:(DE-HGF)0$$aUniversität Bonn$$b2
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000828263 9201_ $$0I:(DE-Juel1)IAS-4-20090406$$kIAS-4$$lTheorie der Starken Wechselwirkung$$x0
000828263 9201_ $$0I:(DE-Juel1)IKP-3-20111104$$kIKP-3$$lTheorie der starken Wechselwirkung$$x1
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