Quasi-two-body decays $$B_{(s)}\rightarrow K^*(892)h\rightarrow K\pi h$$ B ( s ) → K ∗ ( 892 ) h → K π h in perturbative QCD approach

Abstract

We extend our recent works on the P-wave twopion resonant contributions to the kaon-pion cases in the hadronic charmless B meson decays by employing the perturbative QCD approach. The concerned decay modes are analysed in the quasi-two-body framework by parameterizing the kaon-pion distribution amplitude P K π , which contains the final state interactions between the kaon and pion in the resonant region. The relativistic Breit-Wigner formula for the Pwave resonant state K * (892) is adopted to parameterize the time-like form factor F K π. We calculate the C P-averaged branching ratios and direct C P-violating asymmetries of the quasi-two-body decays B (s) → K * (892)h → K π h, with h = (π, K), in this work. It is shown that the agreement of theoretical results with the experimental data can be achieved, through which Gegenbauer moments of the Pwave kaon-pion distribution amplitudes are determined. The predictions in this work will be tested by the precise data from the LHCb and the future Belle II experiments.

Polarization and space charge performance in PVDF with MPB composition BCZT doped composite films

“…The value of composites is 1.170 lC/cm 2 , when the concentration of BCZT particles reaches 20 vol %. 34,35 The conclusion is in agreement with TSDC measurement. On the other hand, it may be related to the polarization of SC at interfaces between BCZT and PVDF.…”

Luminescence of Eu3+ ions in hybrid polymer‐inorganic composites based on poly(methyl methacrylate) and zirconia nanoparticles

“…The SEM of PMMA blocks with modified ZrO 2 -EuO 1.5 nanoparticles is shown in Figure 6 The excitation spectra presented in Figure 8(b) are found in concordance with previous papers [67,68] . They demonstrate two kinds of bands: first, broad bands in the far and middle UV region of 220 to 270 nm with the maxima at 232, 249, and 263 nm.…”

“…On the contrary, when PL is excited at 606 nm, long time, τ f2 , does. If taking into account the peak at 613 nm is characteristic for a monoclinic ZrO 2 polymorph, and the one at 606 nm is for the mixture of the tetragonal and cubic polymorphs according to previous work [67,68,73] , it is reasonable to assume that τ f1 generally compares with monoclinic phase, and τ f2 does with the mixtures of tetragonal and cubic ones. In such a situation, it would be possible to expect that increasing the Eu 3+ content in zirconia nanoparticles from 2 to 10 mol% will lead to the prevalence of long lifetime due to stabilization of tetragonal and cubic phases.…”

Enhanced dielectric properties of poly(vinylidene fluoride)–surface functionalized BiFeO3 composites using sodium dodecyl sulfate as a modulating agent for device applications

“…Meanwhile, the addition of SDS to the surface of hydroxylated BiFeO 3 improves the polarization intensity per unit interface area and ultimately increases the dielectric constant of the composites. As the volume fraction of SDS content increases, maximum air voids are introduced into the composites and the increased amount of air voids are responsible for the enhancement of dielectric loss of the composites . Mainly air voids are created due to the mismatch between the polymer and ceramics.…”