QCD factorization in charmless $B\rightarrow{PV}$ decays - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Conference Papers Year : 2003

QCD factorization in charmless $B\rightarrow{PV}$ decays

R. Aleksan
  • Function : Author
P.F. Giraud
  • Function : Author
O. Pene
  • Function : Author
S. Safir
  • Function : Author

Abstract

Performing a global fit of the experimental branching ratios and CP asymmetries of the charmless B ! PV decays according to QCD factorization, we find it impossible to reach a satisfactory agreement, the confidence level (CL) of the best fit being smaller than 0.1%. The main reason for this failure is the difficulty to accomodate several large experimental branching ratios of the strange channels. Furthermore, experiment was not able to exclude a large direct CP asymmetry in $\overline {B°}\rightarrow gamma+pi−, which is predicted very small by QCD factorisation. Then, trying a fit with QCD factorisation complemented by a charming-penguin inspired model, we reach a best fit which is not excluded by experiment (CL of about 8%) but is not fully convincing. These negative results must be tempered by the remark that some of the experimental data used are recent and might still evolve significantly.
Fichier principal
Vignette du fichier
democrite-00013783.pdf (50.73 Ko) Télécharger le fichier

Dates and versions

in2p3-00013783 , version 1 (02-07-2003)

Identifiers

  • HAL Id : in2p3-00013783 , version 1

Cite

R. Aleksan, P.F. Giraud, Vincent Morenas, O. Pene, S. Safir. QCD factorization in charmless $B\rightarrow{PV}$ decays. Workshop On The CKM Unitarity Triangle 2, Apr 2003, Durham, United Kingdom. pp.1-4. ⟨in2p3-00013783⟩
16 View
59 Download

Share

Gmail Mastodon Facebook X LinkedIn More