Structure of the Roper resonance from lattice QCD constraints
نویسندگان
چکیده
منابع مشابه
Structure of the Roper Resonance from Lattice QCD Constraints
Jia-jun Wu,1 Derek B. Leinweber,1 Zhan-wei Liu,1, 2 and Anthony W. Thomas1, 3 Special Research Centre for the Subatomic Structure of Matter (CSSM), Department of Physics, University of Adelaide, Adelaide, South Australia 5005, Australia School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China ARC Centre of Excellence for Particle Physics at the Terascale (CoEPP), Dep...
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In the excited baryon spectrum, of particular interest is the level order of the positive-parity excited nucleon, so-called the Roper resonance N (1440) and the negative-parity nucleon N(1535). It is worth mentioning that this pattern of the level order between positive and negative-parity excited states can be found universally in the ∆, Σ and flavor-octet Λ channels. It is also interesting to...
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متن کاملWhat is the structure of the Roper resonance ?
We investigate the structure of the nucleon resonance N∗(1440) (Roper) within a coupled-channel meson exchange model for pion-nucleon scattering. The coupling to ππN states is realized effectively by the coupling to the σN , π∆ and ρN channels. The interaction within and between these channels is derived from an effective Lagrangian based on a chirally symmetric Lagrangian, which is supplemente...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2018
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.97.094509