USQCD Collaboration Project (Since July 2006)
| Goal |
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We intend to compute the axial couplings, electric and magnetic
moments, semileptonic decay form factors relevant to the extraction of
the Vus CKM matrix element. In addition we intend to
study techniques that will allow us to compute form factors without the
use of the traditional sequential source method. This will allow us to
explore the electromagnetic structure of all the octet and decuplet
baryons. |
| People |
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| Background |
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Hyperons, unlike nucleons, are unstable particles
under weak interactions. As a result, the experimental study of their
properties is not as easy as it is for the nucleons. For that reason the
Hyperon electromagnetic and axial form factors are not as well
determined experimentally. Recent success of lattice QCD calculations in
computing nucleon axial and vector form factors provides assurance that
Lattice QCD can indeed reliably predict the electromagnetic properties
of hyperons. Knowledge of these properties can be very valuable in
understanding both hypernuclear physics, the physics of neutron stars,
as well and shedding light in the structure of nucleons. In addition, it
has been shown that the hyperon semileptonic decays may provide an
additional way of extracting Vus from experimental
data.
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| Progress |
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- Strange Baryon Spectrum
- Hyperon axial coupling and form factors
- Semileptonic decays
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| Talks |
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Strange Baryon Physics in Full Lattice QCD
invited theoretical seminar given at the University of Kentucky,
November 5, 2007
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Nucleon and Hyperon Form Factors from Lattice QCD
11th Baryons Conference, Seoul, Korea, June 12, 2007
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Semileptonic Hyperon Decays in Full QCD
Domain Wall Fermion at Ten Years Workshop, Brookhave National
Laboratory, March, 15-17, 2007
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Last updated: 2008 Jan. 24 |
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