title: Unitarity triangle without semileptonic decays.
abstract: The use of semileptonic decays has become standard in constraining the unitarity triangle. Since precise calculations of these are very challenging, we propose an entirely new approach. The ε{K} constraint, which depends extremely sensitively on |V{cb}|, is replaced by the interplay between ε{K}, BR(B→τν), and ΔM{B{s}}. Improvements on the B→τν branching ratio and on the lattice determinations of f{B{s}}B{s}{1/2} and f{B} can increase the effectiveness of this method significantly.
authors.affiliation: Physics Department, Indiana University, Bloomington, Indiana 47405, USA.
authors.forename: E
authors.initials: E
authors.lastname: Lunghi
authors.forename: Amarjit
authors.initials: A
authors.lastname: Soni