Study of spectral moments in semileptonic decays of the b hadron with the DELPHI detector at LEP

The measurement of the moments of hadronic mass spectrum and of lepton energy spectrum based on a sample of semileptonic decays of the b hadron selected from $Z^0 \to b \bar b$ events recorded with the DELPHI detector at LEP, are presented. These results are interpreted in terms of constraints on the quark masses and on the b-quark kinetic energy value.Comment: Presented at the XXXI Conference on High Energy Physics Amsterdam, July 200

Heavy Quarkonia - A Review of the Experimental Status

A review of the present status of the spectroscopy of heavy quarkonia (b-bbar, c-cbar) is presented.Comment: 6 pages, 4 figures, Presented at the 11th International Conference In Quantum ChromoDynamics (QCD 04), Montpellier, France, 5-9 July 200

SU(3) Predictions of B→PPB\to PP Decays in the Standard Model

With SU(3) symmetry one only needs 13 hadronic parameters to describe $B\to PP$ decays in the Standard Model. When annihilation contributions are neglected, only 7 hadronic parameters are needed. These parameters can be determined from existing experimental data and some unmeasured branching ratios and CP asymmetries of the type $B\to PP$ can be predicted. In this talk we present SU(3) predictions of branching ratios and CP asymmetries for $B\to PP$ decays in the Standard Model.Comment: 4 pages, no figure. Talk present at the 5th International Conference on Hyperons, Charm and Beauty Hadrons, Vancouver, June 200

The puzzle of excessive non-DDˉD\bar D component of the inclusive ψ(3770)\psi(3770) decay and the long-distant contribution

In this letter we suggest that the obvious discrepancy between theoretical prediction on the $\mathrm{non}-D\bar D$ decays of $\psi(3770)$ and data is to be alleviated by taking final state interaction (FSI) into account. By assuming that $\psi(3770)$ overwhelmingly dissociates into $D\bar D$, then the final state interaction induces a secondary process, we calculate the branching ratios of $\psi(3770)\to D\bar D\to J/\psi\eta, \rho\pi, \omega\eta, K^*K$. Our results show that the branching ratio of $\psi(3770)\to \mathrm{non}-D\bar{D}$ can reach up to $\mathcal{B}_{\mathrm{non}-D\bar{D}}^{FSI}=(0.2\sim1.1)$ while typical parameters $I=0.4$ GeV$^{-2}$ and $\alpha=0.8\sim 1.3$ are adopted. This indicates that the FSI is obviously non-negligible.Comment: 6 pages, 4 figures, 1 tables. More references and discussions added, typos corrected. Accepted by Phys. Lett.

Flavor Physics and the CKM Matrix: An Overview

I review the current status of our knowledge of CP violation and flavor physics. I discuss where one should look for future improvements, and outline the experimental and theoretical priorities of the field.Comment: 11 pages. Presentation at the Fifth KEK Topical Conference, "Frontiers in Flavor Physics", November 20-22, 2001. References adde

CLEO Dalitz plot results

Present and future contributions of the CLEO experiment to the study of $D$ Dalitz plots are presented. Such Dalitz plots can be of help in determining weak phases from $B \to D K$ decays.Comment: 4 pages, 6 figures, presented at Beauty 2005, Assisi, Italy, June 20-24, 2005, on behalf of CLEO Collaboration, one reference adde

Improving Bounds on Penguin Pollution in B -> pi pi

In the presence of penguin contributions, the indirect CP asymmetry in B0(t) -> pi+ pi- measures sin(2\alpha + 2\theta), where 2\theta parametrizes the size of the penguin ``pollution.'' We derive a new upper bound on |2\theta|, requiring the measurement of of BR(B+ -> pi+ pi0) and an upper bound on B00 \equiv {1\over 2} [BR(B0 -> pi0 pi0) + BR(B0bar -> pi0 pi0)]. The new bound is stronger than those previously discussed in the literature. We also present a lower bound on B00. Current data may suggest that it is not very small, in which case \theta can be determined using a complete isospin analysis.Comment: 10 pages, LaTeX, 3 figures. Abstract modified slightly. Submitted to Physics Letter