Samuel, Total hadronic cross-section in e+e- annihilation at the four loop level of perturbative QCD, Phys. Rev. Lett. 66 (1991) 560; T. van Rit... G K.,Chetyrkin,and,... - 《Physics Letters B》 被引量: 252发表: 1979年 The four-loop beta-function in Quantum Chromodynamics We...
, form a large class of decays that allow one to test in principle the underlying tree and penguin topologies at the parton level, as predicted by the standard model (sm). further, the subclass of qcd- and qed-penguin-dominated decays are sensitive to new physics (np) beyond the sm, ...
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1. Aphenomenological NN annihilation optential is studied within this framework. 在Glauber多重散射理论近似下,采用泡里关联的核波函数,使用一种唯象的湮灭势,对180MeV的在12C上的弹性散射微分截面,极化角分布和自旋旋转参数进行了计算。2. We investigate physics s properties of positronium and the way of...
A gaseous hydrogen target at normal pressure and temperature was used and events associated with transitions of the antiprotonic atom to the 2p level were selected by detecting the Balmer X-ray series. The branching ratios for p p annihilation into π + π and K +K from the 2p state are ...
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An electron trap having a very similar ionization energy, 0.06 eV, was found by DLTS measurements on gamma-irradiated GaN, together with other electron traps having ionization energies 0.10, 0.20, and 0.27 eV (Goodman et al., 2001). It seems likely therefore that the donor level close to [...
A numerical study of the optical bistable response of an open linear Frenkel chain of three-level molecules is carried out, making use of the one-molecule ... VA Malyshev,H Glaeske,Feller, K.-H - 《Physical Review A》 被引量: 43发表: 1998年 Low-temperature kinetics of exciton-exciton...
2 are the result of the summation of many frames in order to significantly reduce influence from the level of statistical noise associated with the limited electron counts in the short movie frames. Assumptions for relative energy barrier calculations A precise value of the temperature-dependent ...
Such behaviour of the skyrmion–antiskyrmion pair is consistent with the prediction of the 2D model, suggesting that on a qualitative level, a 2D model of a chiral magnet is able to capture the main features of a more advanced 3D model. For instance, similar to the 2D case3, the 3D ...