Observation and Polarization Measurements of B ± → ϕ K 1 ± and B ± → ϕ K 2

With the full BABAR data sample of 465 × 10 6 B ¯¯¯ B pairs, we observe the decays B ± → φ K 1 ( 1270 ) ± and B ± → φ K ∗ 2 ( 1430 ) ± . We measure the branching fractions ( 6.1 ± 1.6 ± 1.1 ) × 10 − 6 and ( 8.4 ± 1.8 ± 1.0 ) × 10 − 6 and the fractions of longitudinal polarization 0.46 + 0.12 + 0.06...

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Veröffentlicht in:	Physical review letters 2008-10, Vol.101 (16), Article 161801
Hauptverfasser:	Aubert, B., Bona, M., Karyotakis, Y., Lees, J. P., Poireau, V., Prencipe, E., Prudent, X., Tisserand, V., Garra Tico, J., Grauges, E., Lopez, L., Palano, A., Pappagallo, M., Eigen, G., Stugu, B., Sun, L., Abrams, G. S., Battaglia, M., Brown, D. N., Cahn, R. N., Jacobsen, R. G., Kerth, L. T., Kolomensky, Yu. G., Kukartsev, G., Lynch, G., Osipenkov, I. L., Ronan, M. T., Tackmann, K., Tanabe, T., Hawkes, C. M., Soni, N., Watson, A. T., Koch, H., Schroeder, T., Walker, D., Asgeirsson, D. J., Fulsom, B. G., Hearty, C., Mattison, T. S., McKenna, J. A., Barrett, M., Khan, A., Teodorescu, L., Blinov, V. E., Bukin, A. D., Buzykaev, A. R., Druzhinin, V. P., Golubev, V. B., Onuchin, A. P., Serednyakov, S. I., Skovpen, Yu. I., Solodov, E. P., Todyshev, K. Yu, Bondioli, M., Curry, S., Eschrich, I., Kirkby, D., Lankford, A. J., Lund, P., Mandelkern, M., Martin, E. C., Stoker, D. P., Abachi, S., Buchanan, C., Gary, J. W., Liu, F., Long, O., Shen, B. C., Vitug, G. M., Yasin, Z., Zhang, L., Sharma, V., Campagnari, C., Hong, T. M., Kovalskyi, D., Mazur, M. A., Richman, J. D., Beck, T. W., Eisner, A. M., Flacco, C. J., Heusch, C. A., Kroseberg, J., Lockman, W. S., Schalk, T., Schumm, B. A., Seiden, A., Wang, L., Wilson, M. G., Winstrom, L. O., Cheng, C. H., Doll, D. A., Echenard, B., Fang, F., Hitlin, D. G., Narsky, I., Piatenko, T., Porter, F. C., Andreassen, R., Mancinelli, G., Meadows, B. T.
Format:	Artikel
Sprache:	eng
Schlagworte:	Experiments Física de partícules High Energy Physics - Experiment Particle physics Physics
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Zusammenfassung:	With the full BABAR data sample of 465 × 10 6 B ¯¯¯ B pairs, we observe the decays B ± → φ K 1 ( 1270 ) ± and B ± → φ K ∗ 2 ( 1430 ) ± . We measure the branching fractions ( 6.1 ± 1.6 ± 1.1 ) × 10 − 6 and ( 8.4 ± 1.8 ± 1.0 ) × 10 − 6 and the fractions of longitudinal polarization 0.46 + 0.12 + 0.06 − 0.13 − 0.07 and 0.80 + 0.09 − 0.10 ± 0.03 , respectively. We also report on the B ± → φ K ∗ 0 ( 1430 ) ± decay branching fraction of ( 7.0 ± 1.3 ± 0.9 ) × 10 − 6 and several parameters sensitive to C P violation and interference in the above three decays. Upper limits are placed on the B ± decay rates to final states with φ and K 1 ( 1400 ) ± , K ∗ ( 1410 ) ± , K 2 ( 1770 ) ± , or K 2 ( 1820 ) ± . Understanding the observed polarization pattern requires amplitude contributions from an uncertain source.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.101.161801