Revisiting $$\Xi _{Q}-\Xi _{Q}^{\prime }$$ mixing in QCD sum rules

Abstract

In this work, we perform a QCD sum rules analysis on $$\Xi _{Q}-\Xi _{Q}^{\prime }$$ Ξ Q - Ξ Q ′ mixing. Contributions from up to dimension-6 four-quark operators are considered. However, it turns out that only dimension-4 and dimension-5 operators contribute, which reveals the non-perturbative nature of mixing. In particular, we observe that only the diagrams with the two light quarks participating in gluon exchange contribute to the mixing. Our results indicate that the mixing angle $$\theta _{c}=(1.2\sim 2.8)^{\circ }$$ θ c = ( 1.2 ∼ 2.8 ) ∘ for the $$Q=c$$ Q = c case and $$\theta _{b}=(0.28\sim 0.34)^{\circ }$$ θ b = ( 0.28 ∼ 0.34 ) ∘ for the $$Q=b$$ Q = b case. Our prediction of $$\theta _{c}$$ θ c is consistent with the most recent Lattice QCD result within error. Such a small mixing angle seems unlikely to resolve the tension between the recent experimental measurement from Belle and Lattice QCD calculation for the semileptonic decay $$\Xi _{c}^{0}\rightarrow \Xi ^{-} e^{+}\nu _{e}$$ Ξ c 0 → Ξ - e + ν e .

Tensile Stress‐Activated and Exosome‐Transferred YAP/TAZ‐Notch Circuit Specifies Type H Endothelial Cell for Segmental Bone Regeneration

“…Certainly, the process of cell mechanotransduction is intricate, encompassing complexities such as nuclear mechanosensing‐dependent chromatin remodeling, which may occur simultaneously with the activation of YAP/TAZ, influencing transcriptional activity. [ 38 ] Consequently, the comprehensive biological mechanisms underlying the effects of TS are still in need of further refinement. Moreover, the prevailing activation profile of cell‐matrix signals in regenerated tissue of DO process demonstrates a primary upregulation of genes encoding adhesion molecules such as Fndc1 , Tnn , Cdh3 , and others—findings heretofore unreported in previous studies focusing on THECs during bone development.…”

Chemistry Aspects and Designing Strategies of Flexible Materials for High‐Performance Flexible Lithium‐Ion Batteries

“…Therefore, several research approaches have been dedicated to ceramics in polymer electrolytes, especially in improving mechanical stability, flexibility, and electrochemical performance. A gigantic investigation has been done to make SCEs with attractive properties by mixing various types of polymer electrolytes with garnet‐based solid electrolytes; the major examples of these polymers are PVDF, [152–155] PVdF‐HFP, [156–160] PEC, [161] PPC, [128,162–164] PAN, [165] PMMA, [166,167] PEG, [168] PEGDA, [169] and the combination of polymers [170–172] was used to design the flexible, innovative garnet‐based ceramics in polymer electrolytes.…”

Using focused ultrasound to modulate microglial structure and function

“…In both female and male mice overexpressing the human amyloid precursor protein (TgCRND8), an increase in endogenous IgG (150 kDa) and IgM (900 kDa) extravasation into the brain parenchyma has been observed between 4 h and 4 days after the cerebral cortex was targeted with 0.5 MHz FUS + microbubbles at 0.3 MPa (Jordão et al, 2013). Functionally, both albumin and immunoglobulins could act as chaperones to increase microglial phagocytosis (Bard et al, 2000;Brazil et al, 2000;Jordão et al, 2013;Leinenga and Götz, 2015;Sun et al, 2021), although further in vivo evidence would strengthen this statement. Overall, it is evident that blood-borne substances extravasating into the brain following FUS + microbubble treatments can promote specific microglial responses.…”