We present improved measurements of the branching fraction B, the longitudinal polarization fraction f(L), and the direct CP asymmetry A(CP) in the B meson decay channel B+->rho(+)rho(0). The data sample was collected with the BABAR detector at SLAC. The results are B(B+->rho(+)rho(0))=(23.7 +/- 1.4 +/- 1.4)x10(-6), f(L)=0.950 +/- 0.015 +/- 0.006, and A(CP)=-0.054 +/- 0.055 +/- 0.010, where the uncertainties are statistical and systematic, respectively. Based on these results, we perform an isospin analysis and determine the Cabibbo-Kobayashi-Maskawa phase angle alpha=arg(-VtdVtb*/VudVub*) to be (92.4(-6.5)(+6.0))degrees.

Improved Measurement of B+->rho(+)rho(0) and Determination of the Quark-Mixing Phase Angle alpha / Aubert, B., Karyotakis, Y., Lees, J.P., Poireau, V., Prencipe, E., Prudent, X., Tisserand, V., Tico, J.G., Grauges, E., Lopez, L., Palano, A., Pappagallo, M., Eigen, G., Stugu, B., Sun, L., Battaglia, M., Brown, D.N., Kerth, L.T., Kolomensky, Y.G., Lynch, G., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 102:(2009), pp. 141802-141802. [10.1103/physrevlett.102.141802]

Improved Measurement of B+->rho(+)rho(0) and Determination of the Quark-Mixing Phase Angle alpha

CAVOTO, Gianluca;FACCINI, Riccardo;FERRONI, Fernando;GASPERO, Mario;C. Voena;
2009

Abstract

We present improved measurements of the branching fraction B, the longitudinal polarization fraction f(L), and the direct CP asymmetry A(CP) in the B meson decay channel B+->rho(+)rho(0). The data sample was collected with the BABAR detector at SLAC. The results are B(B+->rho(+)rho(0))=(23.7 +/- 1.4 +/- 1.4)x10(-6), f(L)=0.950 +/- 0.015 +/- 0.006, and A(CP)=-0.054 +/- 0.055 +/- 0.010, where the uncertainties are statistical and systematic, respectively. Based on these results, we perform an isospin analysis and determine the Cabibbo-Kobayashi-Maskawa phase angle alpha=arg(-VtdVtb*/VudVub*) to be (92.4(-6.5)(+6.0))degrees.
2009
01 Pubblicazione su rivista::01a Articolo in rivista
Improved Measurement of B+->rho(+)rho(0) and Determination of the Quark-Mixing Phase Angle alpha / Aubert, B., Karyotakis, Y., Lees, J.P., Poireau, V., Prencipe, E., Prudent, X., Tisserand, V., Tico, J.G., Grauges, E., Lopez, L., Palano, A., Pappagallo, M., Eigen, G., Stugu, B., Sun, L., Battaglia, M., Brown, D.N., Kerth, L.T., Kolomensky, Y.G., Lynch, G., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 102:(2009), pp. 141802-141802. [10.1103/physrevlett.102.141802]
File allegati a questo prodotto
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/227514
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 62
  • ???jsp.display-item.citation.isi??? 36
social impact