Study of $B \to X\gamma$ Decays and Determination of $|V_{td}/V_{ts}

Study of $B \to X\gamma$ Decays and Determination of $|V_{td}/V_{ts}

Using a sample of 471 million BBbar events collected with the BaBar detector, we study the sum of seven exclusive final states B->X_s(d) gamma, where X_s(d) is a strange (non-strange) hadronic system with a mass of up to 2.0GeV/c^2. After correcting for unobserved decay modes, we obtain a branchi...

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Veröffentlicht in:Physical review. D 2010, Vol.82
Hauptverfasser: del Amo Sanchez, P., Lees, J.P., Poireau, V., Prencipe, E., Tisserand, V., Garra Tico, J., Grauges, E., Martinelli, M., Palano, A., Pappagallo, M., Eigen, G., Stugu, B., Sun, L., Battaglia, M., Brown, D.N., Hooberman, B., Kerth, L.T., Kolomensky, Yu. G., Lynch, G., Osipenkov, I.L., Tanabe, T., Hawkes, C.M., Watson, A.T., Koch, H., Schroeder, T., Asgeirsson, D.J., Hearty, C., Mattison, T.S., Mckenna, J.A., Khan, A., Randle-Conde, A., Blinov, V.E., Buzykaev, A.R., Druzhinin, V.P., Golubev, V.B., Onuchin, A.P., Serednyakov, S.I., Skovpen, Yu. I., Solodov, E.P., Todyshev, K. Yu, Yushkov, A.N., Bondioli, M., Curry, S., Kirkby, D., Lankford, A.J., Mandelkern, M., Martin, E.C., Stoker, D.P., Atmacan, H., Gary, J.W., Liu, F., Long, O., Vitug, G.M., Campagnari, C., Hong, T.M., Kovalskyi, D., Richman, J.D., Eisner, A.M., Heusch, C.A., Kroseberg, J., Lockman, W.S., Martinez, A.J., Schalk, T., Schumm, B.A., Seiden, A., Winstrom, L.O., Cheng, C.H., Doll, D.A., Echenard, B., Hitlin, D.G., Ongmongkolkul, P., Porter, F.C., Rakitin, A.Y., Andreassen, R., Dubrovin, M.S., Mancinelli, G., Meadows, B.T., Sokoloff, M.D., Bloom, P.C., Ford, W.T., Gaz, A., Hirschauer, J.F., Nagel, M., Nauenberg, U., Smith, J.G., Wagner, S.R., Ayad, R., Toki, W.H., Karbach, T.M., Merkel, J., Petzold, A., Spaan, B., Wacker, K., Kobel, M.J., Schubert, K.R., Schwierz, R., Bernard, D., Verderi, M., Clark, P.J., Playfer, S.
Format: Artikel
Sprache:eng
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High Energy Physics - Experiment
Physics
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Zusammenfassung:Using a sample of 471 million BBbar events collected with the BaBar detector, we study the sum of seven exclusive final states B->X_s(d) gamma, where X_s(d) is a strange (non-strange) hadronic system with a mass of up to 2.0GeV/c^2. After correcting for unobserved decay modes, we obtain a branching fraction for b->d gamma of (9.2 +/- 2.0(stat.) +/- 2.3(syst.))x10^-6 in this mass range, and a branching fraction for b->s gamma of (23.0 +/- 0.8(stat.) +/- 3.0(syst.))x10^-5 in the same mass range. We find BF(b->dgamma) / BF(b->sgamma) = 0.040 +/- 0.009(stat.) +/- 0.010(syst.), from which we determine |V_td/V_ts|=0.199 +/- 0.022(stat.) +/- 0.024(syst.) +/- 0.002(th.).
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.82.051101