502 research outputs found
Lamb Shift in Light Muonic Atoms - Revisited
In connection with recent and proposed experiments, and new theoretical
results, my previous calculations of the Lamb shift in muonic hydrogen will be
reviewed and compared with other work. In addition, numerical results for
muonic deuterium and helium will be presented. Some previously neglected (but
very small) effects are included.Comment: 41 pages. This paper has appeared in Annals of Physics, vol. 327, pp
733-763 (2012). The present version has corrected several misprints, and
updated some references to take into account new result
Lamb Shift in Muonic Hydrogen
The Lamb shift in muonic hydrogen continues to be a subject of experimental
and theoretical investigation. Here my older work on the subject is updated to
provide a complementary calculation of the energies of the 2p-2s transitions in
muonic hydrogen.Comment: 15 pages, no figures. 2 small misprints corrected. Published in Phys.
Rev.
Hyperfine Structure of S-States in Muonic Helium Ion
Corrections of orders alpha^5 and alpha^6 are calculated in the hyperfine
splittings of 1S and 2S - energy levels in the ion of muonic helium. The
electron vacuum polarization effects, the nuclear structure corrections and
recoil corrections are taken into account. The obtained numerical values of the
hyperfine splittings -1334.56 meV (1S state), -166.62 meV (2S state) can be
considered as a reliable estimate for the comparison with the future
experimental data. The hyperfine splitting interval Delta_{12}=(8 Delta
E^{hfs}(2S)- Delta E^{hfs}(1S)) = 1.64 meV can be used for the check of quantum
electrodynamics.Comment: 14 pages, 5 figure
Using a Train-the-Trainer Model and Active Learning to Reach Biology Freshmen
Using the train-the-trainer model as our foundation, we created a new information literacy program in an introductory lab course. We will describe the program’s development, implementation, and evolution since first implemented in Spring Semester 2013.We also will share the advantages of using the train-the-trainer model in an information literacy program, particularly regarding its potential to reduce librarians’ time commitment and help librarians build lasting relationships with teaching faculty and graduate students
Vacuum polarization in muonic and antiprotonic atoms: the fine structure at medium Z
Effects of vacuum polarization modify the energy levels in atoms with an
orbiting particle heavier than an electron. The dominant effect is due to the
Uehling potential. In this paper we consider the relativistic corrections to
the energy levels caused by the Uehling potential and in particular the fine
structure in muonic and antiprotonic atoms. We derive general expressions and
consider in detail specific regions of parameters which allow simple asymptotic
expansion. We take into account the recoil effects and anomalous magnetic
moment in the case of an antiproton as the orbiting particle
Dimuon production by laser-wakefield accelerated electrons
We analyze pair production generated by high-energy electrons
emerging from a laser-wakefield accelerator. The pairs are created
in a solid thick high- target, following the electron accelerating plasma
region. Numerical estimates are presented for electron beams obtained presently
in the LBL TW laser experiment \cite{C2} and possible future developments.
Reactions induced by the secondary bremsstrahlung photons dominate the dimuon
production. According to our estimates, a 20 pC electron bunch with energy of 1
(10) GeV may create about 200 (6000) muon pairs. The produced can be
used in studying various aspects of muon-related physics in table top
installations. This may be considered as an important step towards the
investigation of more complicated elementary processes induced by laser driven
electrons.Comment: 14 pages, 5 figure
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