We review how lattice QCD can contribute to the prediction and the comprehension of
tetraquarks, pentaquarks and related exotic hadrons such as hybrids, with at least one …

The pentaquark is proposed to be made from four quarks and one antiquark, which is an
allowed combination by the theory of quantum chromodynamics. However, there was no …

We discuss a robust projection method for the extraction of excited-state masses of the
nucleon from a matrix of correlation functions. To illustrate the algorithm in practice, we …

The Clebsch-Gordan decomposition is calculated for direct products of the irreducible
representations of the cubic space group. These results are used to identify multiparticle …

We present results for the negative parity low-lying state of the nucleon, N12−(1535 MeV)
S11, from a variational analysis method. The analysis is performed in quenched QCD with …

We present results for the first positive parity excited state of the nucleon, namely, the Roper
resonance ([Formula: see text]) from a variational analysis technique. The analysis is …

Positive-parity spin-1 2 excitations of the nucleon are explored in lattice QCD. The
variational method is used in this investigation and several correlation matrices are …

We study the spectrum of the even-parity excitations of the nucleon in quenched lattice QCD.
We extend our earlier analysis by including an expanded basis of nucleon interpolating …

The QCD sum rule method is formulated for the strangeness+ 1 pentaquark baryon with
isospin I= 0 and spin-parity J π= 3 2<? format?>±. The spin-3 2 states are considered to be …

This work revisits the pentaquark episode, particularly in reference to lattice QCD, to collect
in one place the lessons that have been or should be learnt. This also examines whether …