Chiral study of the a(0)(980) resonance and pi eta scattering phase shifts in light of a recent lattice simulation

Guo Zhi-Hui; Liu Liuming; Meissner Ulf-G.Oller J. A.Rusetsky A.

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Chiral study of the a(0)(980) resonance and pi eta scattering phase shifts in light of a recent lattice simulation

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We investigate the a(0)(980) resonance within chiral effective field theory through a three-coupledchannel analysis, namely, pi eta, KK- , and pi eta('). A global fit to recent lattice finite-volume energy levels from pi eta scattering and relevant experimental data on a pi eta event distribution and the gamma gamma -> pi eta cross section is performed. Both the leading and next-to-leading-order analyses lead to similar and successful descriptions of the finite-volume energy levels and the experimental data. However, these two different analyses yield different pi eta scattering phase shifts for the physical masses for the pi, K,eta, and eta(') mesons. The inelasticities, the pole positions in the complex energy plane, and their residues are calculated both for unphysical and physical meson masses.

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《Physical review, D》 |2017年第5期|共22页
作者
Guo Zhi-Hui; Liu Liuming; Meissner Ulf-G.Oller J. A.Rusetsky A.;
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作者单位

Hebei Normal Univ, Dept Phys, Shijiazhuang 050024, Peoples R China;

Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany;

Univ Murcia, Dept Fis, E-30071 Murcia, Spain;

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正文语种英语
中图分类粒子物理学;场论;
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机译：The effect of phonon scattering upon resonance Raman scattering: The use of monochromatically excited resonant light scattering as a probe of ultrafast dephasing and relaxation in the condensed phase
2. Chiral loops and a(0)(980) exchange in phi - pi(0)eta gamma [J] . Bramon A., Lucio JL., Napsuciale M.Pancheri G.Escribano R. Physics Letters, B. Nuclear Physics and High Energy Physics . 2000,第4期

机译：Chiral loops and a(0)(980) exchange in phi - pi(0)eta gamma
3. Properties of the pi(0), eta, eta ', sigma, f(0) (980) and a(0) (980) mesons and their relevance for the polarizabilities of the nucleon [J] . Schumacher M The European Physical Journal, A. Hadrons and Nuclei . 2007,第3期

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5. Dibaryon Resonance 2.9 GeV in Elastic Backward pi /sup -/d Scattering [R] . Chuvilo, I. V. , Kondratyuk, L. A. , Radkevich, I. A. , 1986

机译：Dibaryon Resonance 2.9 GeV in Elastic Backward pi / sup - / d scattering

Chiral study of the a(0)(980) resonance and pi eta scattering phase shifts in light of a recent lattice simulation

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