Projects per year
We present a calculation of the SU(3)-breaking corrections to the hyperon transition vector form factors to O(p(4)) in heavy-baryon chiral perturbation theory with finite-range regularization. Both octet and decuplet degrees of freedom are included. We formulate a chiral expansion at the kinematic point Q(2) = -(M-B1-M-B2)(2), which can be conveniently accessed in lattice QCD. The two unknown low-energy lconstants at this point are constrained by lattice QCD simulation results for the Sigma(-) -> n and Xi(0) -> Sigma(+) transition form factors. Hence, we determine lattice-informed values of f(1) at the physical point. This work constitutes progress toward the precise determination of vertical bar V-us vertical bar from hyperon semileptonic decays.
|Number of pages||11|
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|Publication status||Published - 21 Oct 2015|
- LATTICE QCD
Ball, R., Berera, A., Boyle, P., Callison-Burch, C., Del Debbio, L., Gardi, E., Kennedy, A., O'Connell, D., Zwicky, R., Berera, A., Boyle, P., Buckley, A., Del Debbio, L., Gardi, E., Horsley, R., Kennedy, A., Kenway, R., O'Connell, D., Smillie, J. & Zwicky, R.
1/10/14 → 30/09/18