Delocalized SYZ mirrors and confronting top–down SU(3)-structure holographic meson masses at finite g and $$N_c$$ N c with P(article) D(ata) G(roup) values

Abstract

Meson spectroscopy at finite gauge couplingwhereat any perturbative QCD computation would break down -and finite number of colors, from a top-down holographic string model, has thus far been entirely missing in the literature. This paper fills this gap. Using the delocalized type IIA SYZ mirror (with SU ( (Chin Phys C 38:090001, 2014). Through explicit computations, we verify that the vector and scalar meson spectra obtained by the gravity dual with a black hole for all temperatures (small and large) are nearly isospectral with the spectra obtained by a thermal gravity dual valid for only low temperatures; the isospectrality is much closer for vector mesons than scalar mesons. The black-hole gravity dual (with a horizon a e-mail: viitr.dph2015@iitr.ac.in b e-mail: aalokfph@iitr.ac.in c e-mail: krusldph@iitr.ac.in radius smaller than the deconfinement scale) also provides the expected large-N suppressed decrease in vector meson mass with increase of temperature.

ChemInform Abstract: Phase‐Transfer Activation of Transition Metal Catalysts

“…Phase-transfer catalysis hasm ade an immense impact upon chemistry since its initial development approximately 45 years ago. [11,12] It is potentially applicable to any process in which two reactants are localized in orthogonal phases. Students are usually introduced to the subjectv ia aqueous/organic liquid/ liquid biphasic systemso ft he type depictedi nF igure 1.…”

“…Catalysts that enable the anion to cross the phase boundary into the organic solvent, where, for example, as ubstitution reaction might occur,i ncludea lkyl-substituted ammonium and phosphonium salts, as well as crown ethers. [11,12] Similar protocols have been devised to effect reactions in the aqueous phase ("inverse phase-transfer catalysis"). [13,14] The conceptc an also be extended to orthogonal liquid and solid phases.T he solid might take the form of ap ure reactant( e.g., NaCl), an insoluble polymer that incorporates ar eactant( e.g., ion-exchanger esin), or as olid solution of ar eactanti na ni nert matrix.…”

“…As shown in Scheme 9, ring-closing metatheses were conducted with three substrates (14,12,16)u nder three sets of Figure 4a re representative). In all cases, both 7e and 7g gave significantly faster reactions under H 2 O/CH 2 Cl 2 biphasic conditions than under CH 2 Cl 2 monophasic conditions.…”

Highly Selective Room Temperature Monoreduction of Dinitro‐arenes by Hydrogen Sulfide under Liquid–Liquid Biphasic Catalysis

“…The reaction rate gets accelerated when PTC helps in transferring aqueous phase inorganic anions to the organic phase crossing the interface, and that promotes the reaction between organic reactants with the inorganic anions [44]. Biphasic reaction systems are of two types: liquid-solid and liquid-liquid (L-L) types [44][45][46][47][48][49][50][51][52][53]. The L-L PTC system (which is the case in the present study) is the most simple and widely accepted system, because of its several advantages such as operation simplicity, less requirement of solvent and raw materials compared to other processes, mild operating conditions, the higher selectivity of the product, and enhanced reaction rate.…”

“…Different types of PTCs have been used in multiphase reactions, like phosphonium salts, ammonium salts, crown ethers, cryptands, polyethylene glycols (PEG), etc. [47]. Quaternary phosphonium and ammonium salts are widely used among other PTCs for their higher reactivity, stability at a higher temperature, and less price.…”