Adhesion of methyl methacrylate copolymers with acrylic acid, methacrylic acid, and methacrylamide to silicate glass was studied. The copolymers of methyl methacrylate with acrylic and methacrylic ...acids, compared to poly(methyl methacrylate), are characterized by higher adhesion strength of polymer fi lm-silicate glass joints.
Radiating systems of decameter waves are placed directly on the underlying surface. For this reason, soil conditions have a significant effect on the antenna pattern. Numerical simulation allows you ...to determine the antenna pattern for different states of the underlying surface with acceptable accuracy for a short period of time. However, the results obtained from the simulation will depend on the size of the region in which the electromagnetic simulation problem is solved. The paper presents the results of the analysis of the influence of the size of the region with absorbing boundaries that bound the radiating system on the form obtained in the process of numerical simulation of the radiation pattern.
The future Belle II experiment will employ a computer-farm based data reduction system for the readout of its innermost detector, a DEPFET-technology based silicon detector with pixel readout. A ...large fraction of the background hits can be rejected by defining a set of Regions Of Interest (ROI) on the pixel detector sensors and then recording just the data from the pixels inside the ROI. The ROIs are defined on an event by event basis by extrapolating back onto the PXD the charged tracks detected in the outer trackers (a 4 layer double-sided silicon strip detector surrounded by a wire chamber). The tracks are reconstructed in real time on the High Level Trigger (HLT). The pixel detector is then read out based on the ROI information. A demonstrator of this architecture was under beam test earlier this year in DESY (Hamburg, Germany). The demonstrator was operated in an electron beam whose momentum was in the 2-6 GeV/c range with a typical trigger rate of a few kHz in a magnetic field of strength up to 1 T. The demonstrator consists of one pixel sensor and 4 silicon strip sensors arranged in a 5 layers configuration mimicking the Belle II vertex detector. The detector readout was a scaled down version of the full Belle II DAQ + HLT chain. The demonstrator was used to detect the particles, reconstruct in real time the trajectories, identify the ROIs on the PXD plane and record the PXD data within. We describe the requirements and the architecture of the final system together with the results obtained with the demonstrator.
We report a search for \(B\) decays to selected final states with the \(\eta_c\) meson: \(B^{\pm}\to K^{\pm}\eta_c\pi^+\pi^-\), \(B^{\pm}\to K^{\pm}\eta_c\omega\), \(B^{\pm}\to K^{\pm}\eta_c\eta\) ...and \(B^{\pm}\to K^{\pm}\eta_c\pi^0\). The analysis is based on \(772\times 10^6\) \(B\bar{B}\) pairs collected at the \(\Upsilon(4S)\) resonance with the Belle detector at the KEKB asymmetric-energy \(e^+e^-\) collider. We set 90\% confidence level upper limits on the branching fractions of the studied \(B\) decay modes, independent of intermediate resonances, in the range \((0.6-5.3)\times 10^{-4}\). We also search for molecular-state candidates in the \(D^0\bar{D}^{*0}-\bar{D}^0D^{*0}\), \(D^0\bar{D}^0+\bar{D}^0D^0\) and \(D^{*0}\bar{D}^{*0}+\bar{D}^{*0}D^{*0}\) combinations, neutral partners of the \(Z(3900)^{\pm}\) and \(Z(4020)^{\pm}\), and a poorly understood state \(X(3915)\) as possible intermediate states in the decay chain, and set 90\% confidence level upper limits on the product of branching fractions to the mentioned intermediate states and decay branching fractions of these states in the range \((0.6-6.9)\times 10^{-5}\).
We present a measurement of angular observables and a test of lepton flavor
universality in the $B\to K^\ast \ell^+\ell^-$ decay, where $\ell$ is either
$e$ or $\mu$. The analysis is performed on a ...data sample corresponding to an
integrated luminosity of $711~\mathrm{fb}^{-1}$ containing $772\times 10^{6}$
$B\bar B$ pairs, collected at the $\Upsilon(4S)$ resonance with the Belle
detector at the asymmetric-energy $e^+e^-$ collider KEKB. The result is
consistent with Standard Model (SM) expectations, where the largest discrepancy
from a SM prediction is observed in the muon modes with a local significance of
$2.6\sigma$.
Phys. Rev. D 94, 052004 (2016) We report a measurement of the CP violation parameter $\varphi_1$ obtained in
a time-dependent analysis of $B^0\to\bar{D}{}^{(*)0}h^0$ decays followed by
...$\bar{D}{}^0\to K_S^0\pi^+\pi^-$ decay. A model-independent measurement is
performed using the binned Dalitz plot technique. The measured value is
$\varphi_1 = 11.7^{\circ}\pm7.8^{\circ}({\rm stat.})\pm 2.1^{\circ}({\rm
syst.})$. Treating $\sin{2\varphi_1}$ and $\cos{2\varphi_1}$ as independent
parameters, we obtain $\sin{2\varphi_1} = 0.43\pm 0.27({\rm stat.})\pm
0.08({\rm syst.})$ and $\cos{2\varphi_1} = 1.06\pm 0.33({\rm
stat.})^{+0.21}_{-0.15}({\rm syst.})$. The results are obtained with a full
data sample of $772 \times 10^6 B\bar{B}$ pairs collected near the
$\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy
$e^+e^-$ collider.
Study of the K − → e − νπ 0 decay Ajinenko, I. V.; Akimenko, S. A.; Akopdzhanov, G. A. ...
Physics of atomic nuclei,
11/2002, Letnik:
65, Številka:
11
Journal Article
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