Dipion light-cone distribution amplitudes and B → ππ form factors

We suggest to update the expansion coefficients of 2 pi DAs with the distribution amplitudes of light mesons evaluated from lattice QCD, with which we revisit (B) over bar (0) -> pi(+)pi(0) transition form factors from the light-cone sum rules approach and extend the predictions from the threshold of dipion invariant mass to high energies including the resonance region. We also derive B- -> pi(0)pi(0) transition form factors for the isoscalar dipion final state, supplementing to the isovector ones to complete the set of light-cone sum rules prediction of B -> pi pi form factors. Our numerics shows that the lowest resonance gives the dominant contribution to P-wave form factors, while the resonance contribution in the S wave is not so salient.