1,530 research outputs found
The Pion Cloud of the Nucleon: Facts and popular Fantasies
I discuss the concept of the pion cloud surrounding the nucleon and other
hadrons - and its limitations.Comment: 9 pp, 3 figs, invited talk, to appear in the proceedings of the
workshop ``Shape of Hadrons'' (Athens, Greece, 2006
Some recent developments in chiral perturbation theory
In this talk, I address some recent developments in chiral perturbation
theory at unphysical and physical quark masses.Comment: Plenary talk delivered at the 5th International Workshop on Chiral
Dynamics, Theory and Experiment (CD 2006), September 18 - 22, 2006,
Durham/Chapel Hill, NC, US
Nuclear lattice simulations: Status and perspectives
I review the present status of nuclear lattice simulations.
This talk is dedicated to the memory of Gerald E. Brown.Comment: Plenary talk sponsored by The European Physical Journal A -- Hadrons
and Nuclei, INPC 2013, Florence, Italy, 8 pages, 3 figures, uses webofc.cl
Quark mass dependence of baryon properties
I discuss the quark mass dependence of various baryon properties derived from
chiral perturbation theory. Such representations can eventually be used as
chiral extrapolation functions when lattice data at sufficiently small quark
masses become available. The quark mass dependence is encoded in loop and
contact term contributions, the latter given in terms of low-energy constants.
I stress the importance of utilizing phenomenological input to constrain a
certain class of low-energy constants and discuss the ensuing theoretical
uncertainty for various baryon observables, like the nucleon and the baryon
octet masses, the nucleon isovector anomalous magnetic moment and the
axial-vector coupling of the nucleon. I stress the role of resonance decoupling
and present first results for the delta mass based on an effective field theory
in which the nucleon-delta mass splitting is counted as a small parameter. I
also discuss briefly the pion mass dependence of the nuclear force as derived
from chiral nuclear effective field theory.Comment: 21 pp, PoS style, plenary talk at Lattice 2005, Trinity College,
Dublin, Irland, 25th-30th July 200
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