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NSR database version of May 3, 2024.

Search: Author = D.Siemens

Found 3 matches.

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2017SI25      Phys.Rev. C 96, 055205 (2017)

D.Siemens, V.Bernard, E.Epelbaum, A.M.Gasparyan, H.Krebs, Ulf-G.Meissner

Elastic and inelastic pion-nucleon scattering to fourth order in chiral perturbation theory

NUCLEAR REACTIONS ¹H(π^-, π⁰π⁰), (π^-, π⁺π^-), (π^-, π⁰π^-), (π⁺, π⁺π⁺), (π^-, π⁺π⁰), T_π<0.4 GeV; calculated pion-nucleon total cross sections, σ(θ, E), low-energy constants (LECs); deduced contributions of the Δ(1232) resonance. Chiral perturbation theory using heavy-baryon approach and covariant formulation, with extended on-mass-shell (EOMS) scheme. Comparison with experimental data.

doi: 10.1103/PhysRevC.96.055205
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2016SI17      Phys.Rev. C 94, 014620 (2016)

D.Siemens, V.Bernard, E.Epelbaum, A.Gasparyan, H.Krebs, Ulf-G.Meissner

Elastic pion-nucleon scattering in chiral perturbation theory: A fresh look

NUCLEAR REACTIONS ¹H(π⁺, π⁺), E=50-150 MeV; analyzed σ(θ) data from GWU-SAID database using chiral perturbation theory up to fourth order within the heavy-baryon (HB) expansion and a covariant approach based on an extended on-mass-shell (EOMS) renormalization scheme; deduced phase shifts and compared with predictions from Roy-Steiner-equation analysis.

doi: 10.1103/PhysRevC.94.014620
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2014SI13      Phys.Rev. C 89, 065211 (2014)

D.Siemens, V.Bernard, E.Epelbaum, H.Krebs, Ulf-G.Meissner

The reaction πN → ππN in chiral effective field theory with explicit Δ(1232) degrees of freedom

doi: 10.1103/PhysRevC.89.065211
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