Possible supersymmetric effects on angular distributions inB→K*(→Kπ)

Abstract

We investigate the angular distributions of the rare B decay, B → K * (→ Kπ)ℓ + ℓ − , in general supersymmetric extensions of the standard model. We consider the new physics contributions from the operators O 7,8,9,10 in small invariant mass region of lepton pair. We show that the azimuthal angle distribution of the decay can tell us the new physics effects clearly from the behavior of the distribution, even if new physics does not change the decay rate substantially from the standard model prediction.

Uncertainty estimates for theoretical atomic and molecular data

“…Clearly, the availability of a reliable oscillator strength for this transition can be used to rescale the predictions [105] and hence reduce the likely uncertainty of the predictions.…”

“…Finally, we mention the existence of semi-empirical methods, such as the "Binary Encounter f-scaling" (BEf) [105] and "Binary Encounter Bethe" (BEB) [106] approaches to electron impact excitation and ionization. While these methods are highly useful in practice, they are somewhat limited in scope.…”

LXCat: an Open‐Access, Web‐Based Platform for Data Needed for Modeling Low Temperature Plasmas

“…Oscillator strength is a quantity that expresses the probability of absorption or emission of electromagnetic radiation in transitions between energy levels of an atom or molecule. These data, combined with a suitable model such as BEf scaling (binary-encounter; oscillator strength, f) [19] can be used to infer the energy dependence and magnitude of electron-neutral scattering cross sections for specific processes for energies greater than several times the threshold energy. These data are included on LXCat because they provide a trove of information about electron-neutral scattering, and in some cases for gases where other scattering data are not available.…”

Electron excitation of the Schumann–Runge continuum, longest band, and second band electronic states in O2

“…This point is also considered further here. Note that the SR continuum transition refers to the X 3 − g (ν = 0) → B 3 − u electronic-state excitation, the LB transition refers to the X 3 − g (ν = 0) → E 3 − u (ν = 0) electronic-state excitation and the SB transition refers to the that application of the energy and oscillator strength scaled Born cross section (BEf-scaling 19 ) approach, for calculating ICSs for dipole-allowed electronic-state transitions, can lead to a very accurate description of the various scattering processes 20 from threshold to 5000 eV. Exceptions to this general statement have only been found in those cases where resonance effects due to the temporary capture of the incident electron by the target and contamination from an accidentally degenerate or near-degenerate triplet state have arisen.…”