Spectroscopy with local multi-hadron interpolators in lattice QCD
Date
2017
Authors
Kiratidis, A.
Kamleh, W.
Leinweber, D.
Liu, Z.
Stokes, F.
Thomas, A.
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Advisors
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Conference paper
Citation
Proceedings of Science, 2017, vol.2016-September, iss.269, pp.1-8
Statement of Responsibility
Conference Name
International Nuclear Physics Conference (11 Sep 2016 - 16 Sep 2016 : Adelaide, South Australia)
Abstract
The positive-parity nucleon spectrum is studied in 2 + 1 flavour lattice QCD in an attempt to discover novel low-lying energy eigenstates in the region of the Roper resonance. In this work, we employ standard three-quark interpolating fields and introduce new local five-quark mesonbaryon operators that hold the possibility of revealing new states that have been missed in previous studies. Motivated by phenomenological arguments, five-quark interpolators based on the σN, πN and a0N channels are constructed. Despite the introduction of qualitatively different operators, no novel energy levels are extracted near the regime of the Roper resonance.
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Copyright 2016 the author(s). Available under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. (http://creativecommons.org/licenses/by-nc-nd/4.0/)