118266807
Physics at super $B$ factory
This report presents the results of studies that investigate the physics reach at a Super B factory, an asymmetric-energy e^+e^- collider with a design luminosity of 5 x 10^35 cm^-2s^-1, which is around 40 times as large as the peak luminosity achieved by the KEKB collider. The studies focus on flavor physics and CP violation measurements that could be carried out in the LHC era. The physics motivation, key observables, measurement methods and expected precisions are presented. The sensitivity studies are a part of the activities associated with the preparation of a Letter of Intent for SuperKEKB, which has been submitted recently. Comment: 191 pages, results of studies by the SuperKEKB Physics Working Group
118266807
Physics at super $B$ factory
This report presents the results of studies that investigate the physics reach at a Super B factory, an asymmetric-energy e^+e^- collider with a design luminosity of 5 x 10^35 cm^-2s^-1, which is around 40 times as large as the peak luminosity achieved by the KEKB collider. The studies focus on flavor physics and CP violation measurements that could be carried out in the LHC era. The physics motivation, key observables, measurement methods and expected precisions are presented. The sensitivity studies are a part of the activities associated with the preparation of a Letter of Intent for SuperKEKB, which has been submitted recently. Comment: 191 pages, results of studies by the SuperKEKB Physics Working Group
123155745
Upgrade of the KEDR tagging system
An upgrade of a special system to tag scattered electrons from two-photon processes, based on triple-GEM detectors, is described. The system is intended for the experiments at the VEPP-4M storage ring. Tests of the detector prototype with two gas mixtures confirm the feasibility of the chosen upgrade layout.
117854224
Observation of CP violation in B-meson decays
With this review, Physics–Uspekhi continues to discuss one of the most mysterious phenomenon in particle physics, that of CP violation. Recent research in this area has focused especially on the properties of B mesons. Successful B-factory experiments have allowed both the detection and detailed study of CP violation in B-meson decays. Presented here is a state of the art review of the field.
14193669
Measurements of gamma/phi_3 at B factories
This report summarizes the most recent progress in measuring the angle gamma (or phi_3) of the Unitarity Triangle.
118186681
On model-independent measurement of the angle phi_3 using Dalitz plot analysis
This report shows the latest results on the study of the method to determine the angle phi_3 of the unitarity triangle using Dalitz plot analysis of D^0 decay from B->DK process in a model-independent way. We concentrate on the case with a limited charm data sample, which will be available from the CLEO-c collaboration in the nearest future, with the main goal to find the optimal strategy for phi_3 extraction.
116827234
Ultimate sensitivity on gamma/phi3 from B->DK
Measurement of the CKM phase gamma in B->DK decays can be potentially performed with high precision due to low theoretical uncertainties. However, the precision measurement requires very large experimental samples of B decays. This report covers prospects for gamma measurement at the future e+e- facilities and upgraded LHCb detector.
118639521
Kernel density estimation of a multidimensional efficiency profile
Kernel density estimation is a convenient way to estimate the probability density of a distribution given the sample of data points. However, it has certain drawbacks: proper description of the density using narrow kernels needs large data samples, whereas if the kernel width is large, boundaries and narrow structures tend to be smeared. Here, an approach to correct for such effects, is proposed that uses an approximate density to describe narrow structures and boundaries. The approach is shown to be well suited for the description of the efficiency shape over a multidimensional phase space in a typical particle physics analysis. An example is given for the five-dimensional phase space of the Λ0b → D0pπ− decay.