Observation of [ital B][sup 0] decay to two charmless mesons

We report results from a search for the decays [ital B][sup 0][r arrow][pi][sup +][pi][sup [minus]], [ital B][sup 0][r arrow][ital K][sup +][pi][sup [minus]], and [ital B][sup 0][r arrow][ital K][sup +][ital K[minus]]. We find 90% confidence level upper limits on the branching fractions, [ital B][su...

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Veröffentlicht in:	Physical review letters 1993-12, Vol.71:24
Hauptverfasser:	Battle, M., Ernst, J., Kroha, H., Kwon, Y., Roberts, S., Sparks, K., Thorndike, E.H., Wang, C.H., Dominick, J., Sanghera, S., Shelkov, V., Skwarnicki, T., Stroynowski, R., Volobouev, I., Zadorozhny, P., Artuso, M., He, D., Goldberg, M., Horwitz, N., Kennett, R., Moneti, G.C., Muheim, F., Mukhin, Y., Playfer, S., Rozen, Y., Stone, S., Thulasidas, M., Vasseur, G., Zhu, G., Bartelt, J., Csorna, S.E., Egyed, Z., Jain, V., Sheldon, P., Akerib, D.S., Barish, B., Chadha, M., Chan, S., Cowen, D.F., Eigen, G., Miller, J.S., O'Grady, C., Urheim, J., Weinstein, A.J., Acosta, D., Athanas, M., Masek, G., Paar, H., Bean, A., Gronberg, J., Kutschke, R., Menary, S., Morrison, R.J., Nakanishi, S., Nelson, H.N., Nelson, T.K., Richman, J.D., Ryd, A., Tajima, H., Schmidt, D., Sperka, D., Witherell, M.S., Procario, M., Yang, S., Balest, R., Cho, K., Daoudi, M., Ford, W.T., Johnson, D.R., Lingel, K., Lohner, M., Rankin, P., Smith, J.G., Alexander, J.P., Bebek, C., Berkelman, K., Besson, D., Browder, T.E., C
Format:	Artikel
Sprache:	eng
Schlagworte:	662420 > Properties of Mesons & Meson Resonances-- (1992-) B MESONS B NEUTRAL MESONS BEAUTY PARTICLES BOSONS BRANCHING RATIO CP INVARIANCE DECAY ELEMENTARY PARTICLES HADRONS INVARIANCE PRINCIPLES KAONS KAONS MINUS KAONS PLUS MESONS PARTICLE DECAY PHYSICS OF ELEMENTARY PARTICLES AND FIELDS PIONS PIONS MINUS PIONS PLUS PSEUDOSCALAR MESONS STRANGE MESONS STRANGE PARTICLES VIOLATIONS WEAK HADRONIC DECAY WEAK PARTICLE DECAY 662350 > Decays of Mesons-- (1992-)
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Zusammenfassung:	We report results from a search for the decays [ital B][sup 0][r arrow][pi][sup +][pi][sup [minus]], [ital B][sup 0][r arrow][ital K][sup +][pi][sup [minus]], and [ital B][sup 0][r arrow][ital K][sup +][ital K[minus]]. We find 90% confidence level upper limits on the branching fractions, [ital B][sub [pi][pi]][lt]2.9[times]10[sup [minus]5], [ital B][sub [ital K][pi]][lt]2.6[times]10[sup [minus]5], and [ital B][sub [ital K][ital K]][lt]0.7[times]10[sup [minus]5]. While there is no statistically significant signal in the individual modes, the sum of [ital B][sub [pi][pi]] and [ital B][sub [ital K][pi]] exceeds zero with a significance of more than 4 standard deviations, indicating that we have observed charmless hadronic [ital B] decays.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.71.3922