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First observation of the decays B(0) --> D(*-)p_p pi+ and B(0) --> D(*-)p_n |
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| Authors: | Anderson S Frolov V V Kubota Y Lee S J Mahapatra R O'Neill J J Poling R Riehle T Smith A Stepaniak C J Urheim J Ahmed S Alam M S Athar S B Jian L Ling L Saleem M Timm S Wappler F Anastassov A Duboscq J E Eckhart E Gan K K Gwon C Hart T Honscheid K Hufnagel D Kagan H Kass R Pedlar T K Schwarthoff H Thayer J B von Toerne E Zoeller M M Richichi S J Severini H Skubic P Undrus A Chen S Fast J Hinson J W Lee J Miller D H Shibata E I Shipsey I P Pavlunin V Cronin-Hennessy D Lyon A L Thorndike E H Jessop C P Marsiske H Perl M L Savinov V Zhou X Coan T E Fadeyev V Maravin Y Narsky I Stroynowski R Ye J |
| Affiliation: | University of Minnesota, Minneapolis, MN 55455, USA. |
| Abstract: | We report the first observation of exclusive decays of the type B-->D(*)N_NX, where N is a nucleon. Using a sample of 9.7x10(6)B_B pairs collected with the CLEO detector operating at the Cornell Electron Storage Ring, we measure the branching fractions B(B0-->D(*-)p_p pi(+)) = (6.5(+1.3)(-1.2)+/-1.0)x10(-4) and B(B0-->D(*-)p_n) = (14.5(+3.4)(-3.0)+/-2.7)x10(-4). Antineutrons are identified by their annihilation in the CsI electromagnetic calorimeter. |
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