Observation Of The Decay B-+/- -> Pi(+/-)Pi(0), Study Of B-+/- -> K-+/-Pi(0), And Search For B-0 -> Pi(0)Pi(0) B Aubert , R Barate , D Boutigny , J M Gaillard , A Hicheur , Y Karyotakis , J P Lees , P Robbe , V Tisserand , A Zghiche , A Palano , A Pompili , J C Chen , N D Qi , G Rong , Peiyu Wang , Y S Zhu , G Eigen , I Ofte , B Stugu , G S Abrams , A W Borgland , A B Breon , D N Brown , J Buttonshafer , R N Cahn , E Charles , M S Gill , A V Gritsan , Y Groysman , R G Jacobsen , R W Kadel , J Kadyk , L T Kerth , Yu G Kolomensky , J F Kral , C Leclerc , M E Levi , G Lynch , Ll M Mir , P J Oddone , T J Orimoto , M Pripstein , N A Roe , A Romosan , M T Ronan , V G Shelkov , A V Telnov , W A Wenzel , T J Harrison , C M Hawkes , D J Knowles , S W Oneale , R C Penny , A T Watson , N K Watson , T Deppermann , K Goetzen , H Koch , B Lewandowski , K Peters , H Schmuecker , M Steinke , N R Barlow , W Bhimji , J T Boyd , N Chevalier , P J Clark , W N Cottingham , C Mackay , F F Wilson , K Abe , C 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Wimmerspergtoeller , Jingmei Wu , Sau Lan Wu , Zhangsheng Yu , H A Neal PHYSICAL REVIEW LETTERS（2003）
摘要
We present results for the branching fractions and charge asymmetries in B+/--->h(+/-)pi(0) (where h(+/-)=pi(+/-),K+/-) and a search for the decay B-0-->pi(0)pi(0) using a sample of approximately 88x10(6) B (B) over bar pairs collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We measure B(B+/--->pi(+/-)pi(0))=(5.5(-0.9)(+1.0)+/-0.6)x10(-6), where the first error is statistical and the second is systematic. The B+/--->pi(+/-)pi(0) signal has a significance of 7.7sigma including systematic uncertainties. We simultaneously measure the K(+/-)pi(0) branching fraction to be B(B+/--->K(+/-)pi(0))=(12.8(-1.1)(+1.2)+/-1.0)x10(-6). The charge asymmetries are A(pi +/- pi 0)=-0.03(-0.17)(+0.18)+/-0.02 and A(K +/- pi 0)=-0.09+/-0.09+/-0.01. We place a 90% confidence-level upper limit on the branching fraction B(B-0-->pi(0)pi(0)) of 3.6x10(-6) .
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