Abstract
We study B+ -> pi(+)pi(0)pi(0) using 711 fb(-1) of data collected at the gamma(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We measure an inclusive branching fraction of (19.0 +/- 1.5 +/- 1.4) x 10(-6) and an inclusive CP asymmetry of (9.2 +/- 6.8 +/- 0.7)%, where the first uncertainties are statistical and the second are systematic, and a B+ -> rho(770)(+)pi(0) branching fraction of (11.2 +/- 1.1 +/- 0.9(-1.6)(+0.8)) x 10(-6), where the third uncertainty is due to possible interference with B+ ->rho(1450)(+)pi(0).
We present the first observation of a structure around 1 GeV/c(2) in the pi(0)pi(0) mass spectrum, with a significance of 6.4 sigma, and measure a branching fraction to be (6.9 +/- 0.9 +/- 0.6) x 10(-6). We also report a measurement of local CP asymmetry in this structure.