1,437 research outputs found
Quasi-two-body decays in the perturbative QCD approach
We study the quasi-two-body decays by employing
the perturbative QCD approach. The two-meson distribution amplitudes
\Phi_{K\pi}^{\text{P-wave}} are adopted to describe the final state
interactions of the kaon-pion pair in the resonance region. The resonance line
shape for the -wave component in the time-like form factor
is parameterized by the relativistic Breit-Wigner function. For
most considered decay modes, the theoretical predictions for their branching
ratios are consistent with currently available experimental measurements within
errors. We also disscuss some ratios of the branching fractions of the
concerned decay processes. More precise data from LHCb and Belle-II are
expected to test our predictions.Comment: 10 pages, 3 figures and 2 tables.To be published in EPJ
The Web Security Password Authentication based the Single-block Hash Function
AbstractI The paper puts forward the Web security password authentication scheme based on the single-block hash function. The scheme can solve the problem effectively that exists in the traditional password authentication or digital signature in the Web authentication of user's identity to realize the defect. It can resist replay attacks, eavesdropping, modification of messages and common attacks, and low cost, high efficiency, satisfying security and efficient needs of structural features for identifiable authentication in the network service. Generally, MD5 or SHA1 is used. But these algorithms are too cumbersome for the Web authentication of user's identity, and the amount of computation is also too huge. The experimental results show that the scheme guarantees safety at the time, and increases the efficiency of the security authentication
- β¦