The 2009 Europhysics Conference on High Energy Physics

Improved measurement of inclusive radiative $B$-meson decays We report a fully inclusive measurement of the flavor changing neutral current decay $B\to X_s\gamma$ in the energy range $1.7\,{\rm GeV}\le E^\mathrm{c.m.s.}_\gamma\le2.8\,{\rm GeV}$, covering 97\% of the total spectrum, where c.m.s. is the center of mass system. Using 605 fb$^{-1}$ of data we obtain measurements of the partial...

Measurement of the Differential Branching Fraction and Forward-Backward Asymmetry for $B \to K^{(*)} \ell^+ \ell^-$ We study $B \to K^{(*)} \ell^+ \ell^-$ decays based on a data sample of 657 million $B\bar{B}$ pairs collected with the Belle detector at the KEKB $e^+ e^-$ collider. We report the differential branching fraction, isospin asymmetry, $K^{*}$ polarization, and the...

We design new observables available from the angular distributions of the decay $B \to K^0 ell^- ell^+$ with high sensitivity to specific new phsyics operators. We present a NLO analysis of all observables based on the QCD factorization approach in the low-dilepton mass region and make the uncertaintities due to the $\Lambda/m_b$ corrections manifest and finally analyse the...

We update our 2006-2007 results for FCNC processes in the Littlest Higgs model with T-parity. The removal of the logarithmic UV cutoff dependence in our previous results through a new contribution to Z0 penguin diagram identified by Goto et al. and Aquila et al., while making the deviations from the SM expectations in the quark sector less spectacular, still allows for sizable new physics...

We present results of precise measurements in the psi family energy range based on the data collected with the KEDR detector at the VEPP-4M e+e- collider in Novosibirsk. They include: final results on the high-precision measurements of the J/psi and psi(2S) masses, leptonic widths of the J/psi meson, D+ and D0 meson masses.

Dalitz plot analysis of the decay $D^0 \to \pi^+\pi^-\pi^0$ We report preliminary results of the Dalitz plot analysis of the decay $D^0 \to \pi^+\pi^-\pi^0$ using a 532 fb$^{-1}$ data sample collected with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider. The fit model includes the intermediate vector resonances $\rho(770)$, $\omega$, $\rho(1450)$, and $\rho(1700)$, the...

please see abstracts 634 and 637.

The 818 fb-1 dataset collected at the psi(3770) resonance in the CLEO-c detector offers unique possibilities for measuring strong phase differences in neutral D decays. The measurements require that both D mesons in the event are fully reconstructed, usually with one decaying to the signal mode of interest, and the other to a CP eigenstate. The strong phase differences extracted from these...

The NA48 experiment at the SPS was designed in the early nineties to solve the issue of the existence of direct CP violation, and to measure it with high precision. The developement of an intense beam, an ensemble of detectors providing state-of-the art resolution, and a performant data acquisition system, allowed to perform several other CP violation measurements to be performed. After...

We report the latest results on rare kaon decays from NA48/2 experiment. Samples of 7200 reconstructed K+- -> pi+- e+ e-, and more than 3000 K+- -> pi+- mu+ mu- events, with very small background contamination, have been collected. The latter is exceeding the total existing statistics by a factor of five. A precise measurement of the branching fractions and the form factors of the rare...

I briefly introduce the theoretical basics of a warped extra dimension with custodial protection, paying particular attention to the flavour structure of this type of models. Then I discuss the implications for particle-antiparticle mixing that is affected by tree level exchanges of KK gauge boson in an important manner. I show that although generically the experimental constraint from...

We are presently finalizing a new determination of the KL lifetime using the whole KLOE data set, consisting of more than 10^9 phi -> KSKL decays (the previous KLOE measurement is reported in PLB 626, 2005). The KL lifetime will be extracted from the proper time distribution of KL -> 3pi0 decays, tagged by KS -> pi+pi- decays on the opposite hemisphere of the apparatus. The measurement...

A phi-factory offers the possibility to select pure kaon beams: neutral kaons from phi → KSKL are in fact produced in a well defined state (JPC=1--) and the detection of a kaon at large (small) times tags a KS (KL). This allow to perform precise measurement of kaon properties, as for example lifetime, and to study time evolution of neutral kaon system. In particular, studying the...

KLOE has measured most decay branching ratios of K_S, K_L amd K^+- mesons. It has also measured the K_L and the K^+- lifetime and determined the shape of the form factors involved in kaon semileptonic decays. We present a description of the above measurements and a well organized compendium of all of our data, with particular attention to correlations. These data provide the basis for...

Measurement of the decay $B^0 \to D^{*-} l^+ \nu$ We present measurements of the branching fraction and of the HQET form factors $\rho^2$, $R_1$ and $R_2$ for the decay $B^0 \to D^{*-} l^+ \nu$ using untagged $\Upsilon(4S) \to B \bar B$ events. The Cabibbo-Kobayashi-Maskawa matrix element $|V_{cb}|$ is extracted and a test of the form factor parametrization is presented. The results are...

presenter will be chousen

We present new results for the low-energy moments of heavy-quark current correlators. These new results can be used to improve the determination of the charm- and bottom-quark masses from experimental data of R(s) or in case of the charm quark from comparison with lattice calculations. For the bottom quark we discuss the impact of new data from the Babar experiment.