Extracting excited states from lattice QCD: the Roper resonance
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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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Quarkonium-nucleus systems are composed of two interacting hadronic states without common valence quarks, which int...
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Using a new quark-field construction algorithm and a large variational basis of operators, we extract a highly excited isovector meson spectrum on dynamical anisotropic lattices. We show how carefully constructed operators can be used to reliably identify the continuum spin of extracted states, overcoming the reduced cubic symmetry of the lattice. Using this method we extract, with confidence, ...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2004
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2004.10.041