semileptonic form factors from two-flavor lattice QCD
Open Access
- 30 December 2009
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 80 (11) , 111502
- https://doi.org/10.1103/physrevd.80.111502
Abstract
We present new lattice results of the semileptonic form factors obtained from simulations with two flavors of dynamical twisted-mass fermions, using pion masses as light as 260 MeV. Our main result is , which, combined with the latest experimental data for decays, leads to . Using the PDG(2008) determinations of and our result implies for the unitarity relation . For the term of the chiral expansion of we get .
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