Charmless 3-body decays of B mesons are studied using a simple model based on the framework of the factorization approach. We have identified a large source of the nonresonant signal in the matrix elements of scalar densities, e.g. 〈KK|s̄s|0〉. This explains the dominance of the nonresonant background in B → KKK decays, the sizable nonresonant fraction of order (35 ∼ 40)% in Kππ and K 0 ππ modes ...

We study an electric quadrupole contribution to sum frequency generation (SFG) at air∕liquid interfaces in an electronically and vibrationally nonresonant condition. Heterodyne-detected electronic sum frequency generation spectroscopy of air∕liquid interfaces reveals that nonresonant χ((2)) (second-order nonlinear susceptibility) has a negative sign and nearly the same value for all eight liqui...

The exact solution for nonresonant A1g and B1g Raman scattering is presented for the simplest model that has a correlated metal-insulator transition, the Falicov-Kimball model, by employing dynamical mean-field theory. In the general case, the A1g response includes nonresonant, resonant, and mixed contributions, and the B1g response includes nonresonant and resonant contributions ~we prove the ...

Resonant and nonresonant intermolecular vibrational energy transfers in KSCN/KSC(13)N/KS(13)C(15)N aqueous and DMF solutions and crystals are studied. Both energy-gap and temperature dependent measurements reveal some surprising results, e.g. inverted energy-gap dependent energy transfer rates and opposite temperature dependences of resonant and nonresonant energy transfer rates. Two competing ...

Hybrid femtosecond/picosecond coherent anti-Stokes Raman scattering (fs/ps CARS) offers accurate thermometry at kHz rates for combustion diagnostics. In high-temperature flames, selection of probe-pulse characteristics is key to simultaneously optimizing signal-to-nonresonant-background ratio, signal strength, and spectral resolution. We demonstrate a simple method for enhancing signal-to-nonre...

Nonresonant detection on terahertz radiation of field effect transistors by the influence of magnetic field is studied in this paper. The influence of the magnetic field upon the electron mobility in the transistor channel is discussed and the corresponding influence on the nonresonant detection photoresponse is analyzed in detail. Based on the work before, the numerical tool has been modified ...

We applied nonlinear interferometry of coherent anti-Stokes Raman spectroscopy (CARS) to measure the nonresonant third-order susceptibilities of various gases. Using argon as an internal calibration standard, we determined the effective nonresonant susceptibilities of acetylene, carbon dioxide, methane, nitrogen, oxygen, propane, carbon monoxide, Freon, and hydrogen from the amplitudes of the i...

A model for field-error penetration is developed that includes nonresonant as well as the usual resonant field-error effects. The nonresonant components cause a neoclassical toroidal viscous torque that keeps the plasma rotating at a rate comparable to the ion diamagnetic frequency. The new theory is used to examine resonant error-field penetration threshold scaling in Ohmic tokamak plasmas. Co...

We investigate the contributions coming from the penguin operators in the nonresonant B → MM̄π (M = π, K, K) decays. The effective Wilson coefficients of the the strong penguin operators O4,6 are found to be relatively larger. We calculate the contributions arising from the O4 and O6 operators in the nonresonant decays B → MM̄π (M = π, K, K̄) using a model combining heavy quark symmetry and the ch...

Nuclear reactions govern major aspects of the chemical evolution of galaxies and stars. Analytic study of the reaction rates and reaction probability integrals is attempted here. Exact expressions for the reaction rates and reaction probability integrals for nuclear reactions in the cases of nonresonant, modified nonres-onant, screened nonresonant and resonant cases are given. These are express...