نتایج جستجو برای: muonic molecule
تعداد نتایج: 134365 فیلتر نتایج به سال:
The Lamb shift (2P1/2 − 2S1/2) in the muonic helium ion (μ 2He) is calculated with the account of contributions of orders α3, α4, α5 and α6. Special attention is given to corrections of the electron vacuum polarization, the nuclear structure and recoil effects. The obtained numerical value of the Lamb shift 1381.716 meV can be considered as a reliable estimate for the comparison with experiment...
The wave functions and the ground state energies for bound states of four different muonic electronic molecules, governed by Chern–Simons potential in two spatial dimensions, are numerically obtained with Numerov method. new results compared former planar configuration studies that consider attractive as being proportional to ln(?), well three-dimensional analogs assuming a Coulomb potential.
A search for neutral heavy leptons (NHLs) has been performed using an instrumented decay channel at the NuTeV (E-815) experiment at Fermilab. The data were examined for NHLs decaying into muonic nal states (, ee, , and); no evidence has been found for NHLs in the 0.25-2.0 GeV mass range. This analysis places limits on the mixing of NHLs with standard light neutrinos at a level up to an order of...
We report the first direct observation of excited state muon transfer in hydrogen/deuterium mixtures by direct measurement of q1s, the probability that a μp atom, which is initially formed in an excited state, reaches the 1s ground state. The dependence of q1s on deuterium concentration cd was measured for two different densities at cryogenic temperatures using charge coupled devices (CCDs) to ...
The largest contributions to the n = 2 Lamb-shift, fine structure interval and 2s hyperfine structure of muonic hydrogen are calculated by exact numerical evaluations of the Dirac equation, rather than by a perturbation expansion in powers of 1/c, in the framework of non-relativistic quantum electrodynamics. Previous calculations and the validity of the perturbation expansion for light elements...
In this paper I review a number of recent results in the field of exotic atoms. Recent experiments or ongoing experiments with muonic, pionic and antiprotonic hydrogen, as well as recent measurement of the pion mass are described. These experiments provide information about nucleon-pion or nucleonantinucleon interaction as well as information on the proton structure (charge or magnetic moment d...
We present a branching ratio measurement for the beta decay of neutral Cascade hyperon, 0 ! + e e , using the KTeV detector at Fermilab. We used the principal decay mode of 0 ! 0 where ! p , as the ux normalization mode. The status of the measurement of the ratio of the axial-vector to vector coupling (g1/f1) for the Cascade beta decay will also be discussed. Furthermore, we present the prelimi...
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