Abstract We study excited light mesons by quenched lattice quantum chromodynamics (QCD) simulations with a truncated overlap fermion formalism based on domain wall fermions. Truncated fermions satisfy chiral symmetry instead of in continuum field theory, as for fermions, but offer lower simulation costs. Our results show good agreement the experimental values state 1 , ρ, and π mesons, demonstr...

The mass spectra of isovector $\Upsilon$, $\psi$, $\phi$, and $\omega$ meson resonances are investigated, in the AdS/QCD information entropy setups. differential configurational is employed to obtain radial $S$-wave resonances, with higher excitation levels, each one these families, whose respective first undisclosed states discussed matched up candidates Particle Data Group.

Direct spectroscopy of a fast molecular ion beam offers many advantages over competing techniques, including the generality of the approach to any molecular ion, the complete elimination of spectral confusion due to neutral molecules, and the mass identification of individual spectral lines. The major challenge is the intrinsic weakness of absorption or dispersion signals resulting from the rel...

The isolation, analysis, synthesis, and characterization of 6-(2-aminopropyl)benzofuran (currently and commonly referred to as 6-APB) are briefly discussed. Analytical data (infrared spectroscopy, mass spectrometry, and nuclear magnetic resonance spectroscopy) are presented to differentiate it from the 4-, 5, and 7positional analogues.

This work outlines the unequivocal identification of the "ecstasy" analog, 2-chloro-4,5-methylenedioxymethylamphetamine, using combined gas chromatography/mass spectroscopy (GC/MS) and proton magnetic resonance spectroscopy (1H-NMR). This compound was identified along with 3,4-methylenedioxymethylamphetamine (MDMA) in an illicit tablet seizure, which included 26 off-white tablets.

Databases for use with analytical chemistry instrumental techniques are surveyed, with attention to existing databases and collection efforts now underway, as well as needs for new data-bases. Collections of spectra for use in NMR, infrared spectroscopy, and mass spectroscopy are described. Using mass spectral databases as an example, a critique is presented of automated quality control procedu...

We have studied UV photolysis of solid ammonia and ammonia-dihydrate samples at 40 K, using infrared spectroscopy, mass spectrometry, and microgravimetry. We have shown that in the pure NH(3) sample, the main species ejected are NH(3), H(2), and N(2), where the hydrogen and nitrogen increase with laser fluence. This increase in N(2) ejection with laser fluence explains the increase in mass loss...

We present optical spectroscopy of 71 photometric candidate low-mass members of the cluster associated with σ Orionis. Thirty-five of these are found to pass the lithium test and hence are confirmed as true cluster members, covering a mass range of ≤ 0.055-0.3M⊙, assuming a mean cluster age of ≤ 5Myr. We find evidence for an age spread on the (I, I−J) colour magnitude diagram, members appearing...