200 citations · 342 across the 11 of their papers we have counts for
12 papers · 1 filter
The Light-Quark Magnetic Moment of the Lambda(1405) Antikaon-Nucleon Molecule
Jonathan M. M. Hall, Waseem Kamleh, Derek B. Leinweber +3
The light-quark sector of the Lambda(1405) baryon is examined in the context of the recent discovery of a dominant antikaon-nucleon composition at low quark masses. Further evidenc…
Light-quark contributions to the magnetic form factor of the Lambda(1405)
Jonathan M. M. Hall, Waseem Kamleh, Derek B. Leinweber +3
In a recent study of the Lambda(1405), the suppression of the strange-quark contribution to the magnetic form factor was interpreted as the discovery of a dominant antikaon-nucleon…
Transition of in Lattice QCD
Benjamin J. Owen, Waseem Kamleh, Derek B. Leinweber +2
With the ongoing experimental interest in exploring the excited hadron spectrum, evaluations of the matrix elements describing the formation and decay of such states via radiative…
Light Meson Form Factors at near Physical Masses
Benjamin Owen, Waseem Kamleh, Derek Leinweber +2
The ability for most hadrons to decay via strong interactions prevents the direct measurement of their electromagnetic properties. However, a detailed understanding of how these re…
Electromagnetic matrix elements for negative parity nucleons
Benjamin Owen, Waseem Kamleh, Derek Leinweber +2
Here we present preliminary results for the evaluation of the electromagnetic form factors for the lowest-lying negative-parity, spin- nucleons, namely the $S_{11}(153…
On the Structure of the Lambda 1405
Jonathan M. M. Hall, Waseem Kamleh, Derek B. Leinweber +4
For almost 50 years the structure of the Lambda 1405 resonance has been a mystery. Recently, a new lattice QCD simulation showing that its strange magnetic form factor vanishes, to…
Lattice QCD Evidence that the Lambda(1405) Resonance is an Antikaon-Nucleon Molecule
Jonathan M. M. Hall, Waseem Kamleh, Derek B. Leinweber +4
For almost 50 years the structure of the Lambda(1405) resonance has been a mystery. Even though it contains a heavy strange quark and has odd parity, its mass is lower than any oth…
Probing the proton and its excitations in full QCD
Benjamin J. Owen, Waseem Kamleh, Derek B. Leinweber +2
We present a first look at the application of variational techniques for the extraction of the electromagnetic properties of an excited nucleon system. In particular, we include pr…
Electromagnetic Form Factors for the (1405)
Benjamin J. Menadue, Waseem Kamleh, Derek B. Leinweber +2
Building on our successful technique to isolate the otherwise-elusive (1405) using correlation matrix techniques and multiple source and sink smearings, we present calculations…
Parity-expanded variational analysis for non-zero momentum
Finn M. Stokes, Waseem Kamleh, Derek B. Leinweber +3
In recent years, the use of variational analysis techniques in lattice QCD has been demonstrated to be successful in the investigation of the rest-mass spectrum of many hadrons. Ho…
Accessing High Momentum States In Lattice QCD
Dale S. Roberts, Waseem Kamleh, Derek B. Leinweber +2
Two measures are defined to evaluate the coupling strength of smeared interpolating operators to hadronic states at a variety of momenta. Of particular interest is the extent to wh…
Extracting Low-Lying Lambda Resonances Using Correlation Matrix Techniques
Benjamin J. Menadue, Waseem Kamleh, Derek B. Leinweber +1
The lowest-lying negative-parity state of the Lambda is investigated in (2+1)-flavour full-QCD on the PACS-CS configurations made available through the ILDG. We show that a variati…