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Abstract
We present a calculation of the SU(3)breaking corrections to the hyperon transition vector form factors to O(p(4)) in heavybaryon chiral perturbation theory with finiterange regularization. Both octet and decuplet degrees of freedom are included. We formulate a chiral expansion at the kinematic point Q(2) = (MB1MB2)(2), which can be conveniently accessed in lattice QCD. The two unknown lowenergy 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 latticeinformed values of f(1) at the physical point. This work constitutes progress toward the precise determination of vertical bar Vus vertical bar from hyperon semileptonic decays.
Original language  English 

Article number  074029 
Number of pages  11 
Journal  Physical Review D  Particles, Fields, Gravitation and Cosmology 
Volume  92 
Issue number  7 
DOIs  
Publication status  Published  21 Oct 2015 
Keywords
 BETADECAY
 LATTICE QCD
 QUARKMODEL
 MASS
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 1 Finished

Particle Theory at the Higgs Centre
Ball, R., Berera, A., Boyle, P., CallisonBurch, 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
Project: Research