Host Cell Transcriptome Profile during Wild-Type and Attenuated Dengue Virus Infection

10.1371/journal.pntd.0002107PLoS Neglected Tropical Diseases73

NUCLEAR ANAPOLE MOMENT IN RELATIVISTIC MODEL AND ITS EFFECT IN ATOMIC PARITY VIOLATION MEASUREMENTS

An expression for nuclear anapole moment is derived within a valence nucleon relativistic mean-field nuclear model. The anapole moment parameter values are calculated for Cs-133, Rb-85, and Bi-209 nuclei. The result reproduces the observed difference between hyperfine E1 transition amplitudes in Cs-133, within the experimental accuracy. The change in the optical polarization rotation angle, induced by the parity violating electron-anapole interaction, in Bi is also calculated

Pseudo-spin as a relativistic symmetry

The existence of broken pseudo-spin symmetry in the Pb nucleus has been studied in the relativistic mean field approach using realistic Lagrangian parameters. Its relationship to spin orbit splitting and the vanishingly small surface delta character of the mean spin orbit potential are investigated. In the Pb-208 nucleus the broken pseudo-spin doublets are found to exist above the neutron (proton) Fermi surfaces

Relativistic mean field calculation of parity-violating observables in francium

A formalism developed previously to study the smaller nuclear spin-dependent parity-violating effects using the relativistic mean field theory has been generalized to the case of odd-odd nuclear systems such as Fr-210. Because of the recent success in trapping Fr atoms, parity-violation experiments for Fr seem feasible. The nuclear spin-dependent parameters eta and eta' are calculated using the anapole moment parameters kappa(p) and kappa(n). They are used to calculate the hyperfine transition amplitudes for the 6S-->7S transition in Cs-134 and 7S -->8S in Fr-210. The calculated hyperfine transition amplitudes in Fr are one order of magnitude larger than those in Cs

Nuclear parity-violating effects - anapole moment

We present here the relativistic formulation for the calculation of the nuclear anapole moment in the relativistic mean field (RMF) approach. The RMF results are presented for relevant nuclei. We also report the result of our preliminary calculations for the nuclear anapole moment for Cs-133 Obtained with different sets of weak meson-nucleon coupling constants

RELATIVISTIC MEAN-FIELD APPROACH TO ANAPOLE MOMENT - ATOMIC PARITY-VIOLATING HYPERFINE TRANSITIONS

A generalized formula of nuclear anapole moment-is derived using the current relativistic nuclear approach. The Dirac spin magnetization and the anomalous spin magnetization contributions to anapole moment are shown to be proportional to the second moment of respective magnetizations. The valence nucleon effective g(l)(g(a)) factors in a nucleus are obtained from the different phenomenological generalizations of relativistic nuclear magnetic moment. The unitary transformation approach is used to derive the parity nonconserving (PNC) perturbed wave functions. In the case of gl parametrization, the anomalous spin magnetization and pion contributions to anapole moment are nearly two and three times the Dirac magnetization contribution respectively; while for g(a) parametrization, all the three contributions are of the same order of magnitude. Using these calculated values of anapole moment and available atomic structure data from published literature, the Cs-133 pNC hyperfine amplitudes are calculated. The results are closer to the experimental data, particularly when the measured value of ImEP1(p.v.)/beta is used. The optical rotation angles induced by nuclear spin dependent PNC interaction are also calculated