Focus on Spectroscopy

Focus on multidimensional optical spectroscopy and imaging

Optical spectroscopy using ultrafast light pulses has undergone a revolution in the last decade due to the introduction and development of multidimensional coherent techniques. These methods build on established coherent spectroscopic techniques, such as photon echoes, but go beyond them by correlating the coherent dynamics during two time periods. The resulting multidimensional spectra have a ...

Results on Charmed Meson Spectroscopy from Focus on Behalf of the Focus(e831) Collaboration

We report the preliminary measurement by the FOCUS Collaboration (E831 at Fermilab) of masses and widths of the L=1 charm mesons: a D 2 state of mass (width) 2463.5 ± 1.5 ± 1.5(30.5 ± 1.9 ± 3.8)MeV/c decaying to Dπ, and a D 2 state of mass (width) 2468.2 ± 1.5 ± 1.4(28.6 ± 1.3 ± 3.8)MeV/c decaying to Dπ. The fit of the invariant mass distribution requires an additional term to account for a bro...

Charmed Hadron Spectroscopy from Focus

With very accurate measurements of the parameters of the ground state charmed mesons, interest has shifted to the array of excited charm meson states, especially with the interesting discoveries of the last year in the Ds sector. In the limit of infinite quark masses, D mesons may be treated as a “hydrogen atom” type object where the heavy quark does not contribute to the orbital degrees of fre...

Country Focus Uk Cell Biology Microbiology Spectroscopy

the effects of multiple intelligences (focus on musical, visual, and linguistic) and direct instruction on learning grammar: a case on iranian efl students at elementary level

1.0 overview it seems that grammar plays a crucial role in the area of second and foreign language learning and widely has been acknowledged in grammar research. in other words, teaching grammar is an issue which has attracted much attention to itself, and a lot of teachers argue about the existence of grammar in language teaching and learning. this issue will remind us a famous sentence f...