Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Menadue, Benjamin J."'
Autor:
Hall, Jonathan M. M., Kamleh, Waseem, Leinweber, Derek B., Menadue, Benjamin J., Owen, Benjamin J., Thomas, Anthony W.
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 evidence for this interpretation of the Lambda(1405) is presented, by calcula
Externí odkaz:
http://arxiv.org/abs/1703.09895
Autor:
Hall, Jonathan M. M., Kamleh, Waseem, Leinweber, Derek B., Menadue, Benjamin J., Owen, Benjamin J., Thomas, Anthony W.
Publikováno v:
Phys. Rev. D 95, 054510 (2017)
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 composition for this low-lying state. We confirm this result by calcu
Externí odkaz:
http://arxiv.org/abs/1612.07477
Autor:
Owen, Benjamin J., Kamleh, Waseem, Leinweber, Derek B., Mahbub, M. Selim, Menadue, Benjamin J.
Publikováno v:
Phys. Rev. D 92, 034513 (2015)
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 processes provide us with an important connection between theory and e
Externí odkaz:
http://arxiv.org/abs/1505.02876
Autor:
Hall, Jonathan M. M., Kamleh, Waseem, Leinweber, Derek B., Menadue, Benjamin J., Owen, Benjamin J., Thomas, Anthony W., Young, Ross D.
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, together with a comprehensive Hamiltonian analysis of the lattice QCD en
Externí odkaz:
http://arxiv.org/abs/1411.3781
Autor:
Hall, Jonathan M. M., Kamleh, Waseem, Leinweber, Derek B., Menadue, Benjamin J., Owen, Benjamin J., Thomas, Anthony W., Young, Ross D.
Publikováno v:
Phys. Rev. Lett. 114, 132002 (2015)
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 other excited spin-1/2 baryon. Dalitz and co-workers speculated that it m
Externí odkaz:
http://arxiv.org/abs/1411.3402
Autor:
Owen, Benjamin J., Kamleh, Waseem, Leinweber, Derek B., Mahbub, M. Selim, Menadue, Benjamin J.
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 preliminary results for charge radii and magnetic moments of the proton,
Externí odkaz:
http://arxiv.org/abs/1312.0291
Autor:
Menadue, Benjamin J., Kamleh, Waseem, Leinweber, Derek B., Mahbub, M. Selim, Owen, Benjamin J.
Building on our successful technique to isolate the otherwise-elusive $\Lambda$(1405) using correlation matrix techniques and multiple source and sink smearings, we present calculations of the quark sector contributions to the electric form factors o
Externí odkaz:
http://arxiv.org/abs/1311.5026
Autor:
Stokes, Finn M., Kamleh, Waseem, Leinweber, Derek B., Mahbub, M. Selim, Menadue, Benjamin J., Owen, Benjamin J.
Publikováno v:
Phys. Rev. D 92, 114506 (2015)
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. However, due to parity-mixing, more care must be taken for investigation
Externí odkaz:
http://arxiv.org/abs/1302.4152
Autor:
Owen, Benjamin J., Dragos, Jack, Kamleh, Waseem, Leinweber, Derek B., Mahbub, M. Selim, Menadue, Benjamin J., Zanotti, James M.
Publikováno v:
Phys.Lett.B 723 (2013) 217-223
We present a lattice QCD calculation of the nucleon axial charge, gA, using a variational approach. After a brief outline of how the variational method is applied to the calculation of form factors, we present results for gA using this method. We fin
Externí odkaz:
http://arxiv.org/abs/1212.4668
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 which strong overlap can be obtained with individual high-momentum state
Externí odkaz:
http://arxiv.org/abs/1206.5891