N* Spectroscopy from Lattice QCD: The Roper Explained

被引：1

作者：

Leinweber, Derek ^{[1
]}

Kamleh, Waseem ^{[1
]}

Kiratidis, Adrian ^{[1
]}

Liu, Zhan-Wei ^{[1
]}

Mahbub, Selim ^{[1
,2
]}

Roberts, Dale ^{[1
,3
]}

Stokes, Finn ^{[1
]}

Thomas, Anthony W. ^{[1
,4
]}

Wu, Jiajun ^{[1
]}

机构：

[1] Univ Adelaide, Dept Phys, Special Res Ctr Subat Struct Matter CSSM, Adelaide, SA 5005, Australia

[2] CSIRO, Data61, 15 Coll Rd, Sandy Bay, Tas 7005, Australia

[3] Australian Natl Univ, NCI, Canberra, ACT 0200, Australia

[4] Univ Adelaide, Dept Phys, ARC Ctr Excellence Particle Phys Terascale CoEPP, Adelaide, SA 5005, Australia

来源：

PROCEEDINGS OF THE 10TH INTERNATIONAL WORKSHOP ON THE PHYSICS OF EXCITED NUCLEONS (NSTAR2015) | 2016年

基金：

澳大利亚研究理事会;

关键词：

lattice quantum chromodynamics; baryon spectrum; excited states; wave functions; form factors; finite volume; QUANTUM-FIELD THEORIES; VOLUME DEPENDENCE; ENERGY-SPECTRUM;

D O I：

10.7566/JPSCP.10.010011

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

This brief review focuses on the low-lying eVeil- and odd-parity excitations of the nucleon obtained in recent lattice QCD calculations. Commencing with a survey of the 2014-15 literature we'll see that results for the first even-parity excitation energy can differ by as much as 1 GeV, a rather unsatisfactory sit uation.lollowing a brief review of the methods used to isolate excitations of the nucleon in lattice Q( 'I), and drawing on recent advances, we'll see how a consensus on the low-lying spectrum has emerged among many different lattice groups. To provide insight into the nature of these states we'll review the wave functions and electromagnetic form factors that are available for a few of these states. Consistent with the Luscher formalism for extracting phase shifts from finite volume spectra, the Hamiltonian approach to effective field theory in finite volume can provide guidance on the manner in which physical quantities manifest themselves in the finite volume of the lattice. With this insight, we will address the question; Have we seen the Roper in lattice QCD?

引用

页数：8

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