Quasi-two-body decays $$B \rightarrow D K^*(892) \rightarrow D K \pi $$ in the perturbative QCD approach

Abstract

We study the quasi-two-body decays B → DK * (892) → DK π by employing the perturbative QCD approach. The two-meson distribution amplitudes P-wave K π are adopted to describe the final state interactions of the kaon-pion pair in the resonance region. The resonance line shape for the P-wave K π component K * (892) in the timelike form factor F K π (s) is parameterized by the relativistic Breit-Wigner function. For most considered decay modes, the theoretical predictions for their branching ratios are consistent with currently available experimental measurements within errors. We also disscuss some ratios of the branching fractions of the concerned decay processes. More precise data from LHCb and Belle-II are expected to test our predictions.

Therapeutic potential of chemically modified siRNA: Recent trends

“…To strengthen the interaction between the 3′-end of the siRNA, Xu et al [53] designed and synthesized a series of chemically modified nucleotide monomers containing an aromatic hydrophobic structure by applying bioisosterism strategy. Pyrimidine ring was substituted with benzene to enhance the binding between modified motif and hydrophobic residues Phe292, Leu337 and Phe310 in the PAZ domain.…”

Exploring the RNA‐bound and RNA‐free human Argonaute‐2 by molecular dynamics simulation method

“…[3][4][5][6][7] The matching for "seed region" (nt 2-7 or 2-8 from 5′ end) of miRNA is pivotal for target recognition, while the perfect complementary for the left base pairs is not necessary. [8][9][10][11][12][13][14] In mammalian protein-coding genes, about 50% contain the evolutionary conserved miRNA target site and over 1,000 miRNA are encoded in human genome. [15] The first full-length structure of Argonaute protein from Pyrococcus furiosus was determined in 2004.…”

Highly Porous Si Nanoframeworks Stabilized in TiO2 Shells and Enlaced by Graphene Nanoribbons for Superior Lithium‐Ion Storage

“…Moreover, the similar feature with Si@TiO 2 @GNRs that the integral areas of CV curves enlarged along with the cycles increasing corresponds to the fact that the alloying process of Si is sluggish because of the progressive amorphization of the crystalline lattice happening in an extremely small interface, [49] and the fact that deep lithiation of silicon will be activated with the cycling. [50] To further illustrate the electrochemical performance of Si@TiO 2 @GNRs, galvanostatic charge-discharge were tested at different current densities and different cycles, as displayed in Figure 7a, b. Notably, the charge voltage plateaus of Si between 0.3 V to 0.6 V get shorter and the plateau of TiO 2 located at 2.03 V even disappears with the current densities and cycling number increasing, indicating unavoidable capacity decay.…”