193 research outputs found
Poincare invariance in temporal gauge canonical quantization and -vacua
The Poincare invariance in the temporal gauge canonical quantization of QCD
is shown manifestly by verifying the energy-momentum-vector and
angular-momentum-tensor satisfy the Poincare algebra in the physical Hilbert
space. Two different values of for the -term in QCD
lagrangian lead to different representations of the Poincare group, which are,
however, connected by an unitary transformation. Thus the parameter
becomes physically irrelevant unless we can further restrict the physical
Hilbert space.Comment: 18 pages, UCRHEP-T10
Flavor-Changing Magnetic Dipole Moment and Oscillation of a Neutrino in a Degenerate Electron Plasma
The standard model prediction for a magnetic dipole moment of a neutrino is
proportional to the neutrino mass and extremely small. It also generates a
flavor-changing process, but the GIM mechanism reduces the corresponding
amplitude. These properties of a neutrino magnetic moment change drastically in
a degenerate electron plasma. We have shown that an electron-hole excitation
gives a contribution proportional to the electrons' Fermi momentum. Since this
effect is absent in and sector, the GIM cancellation does not
work. The magnetic moment induces a neutrino oscillation if a strong enough
magnetic field exists in the plasma. The required magnitude of the field
strength that affects the \nue\ burst from a supernova is estimated to be the
order of Gauss.Comment: 10 pages, Latex, Misleading terminology and typographical errors are
correcte
Enhancement of the Transition Magnetic Moments of a Neutrino by Degenerate Electrons
The one-loop induced magnetic dipole moments of a neutrino are examined in a
background of degenerate electrons in the standard model. For the
nonrelativistic neutrino, they are enhanced by a factor (8\pF/3\mnu) ,
where \pF\ is the electron Fermi momentum and \mnu\ the neutrino mass. For the
relativistic neutrino, they enhance the flavor-changing but helicity-conserving
process because of the absence of the GIM cancellation.Comment: 17 pages, LaTex, 3 figures available upon reques
UDFS in shoulder surgeries
The purpose of this study was to clarify the difference in onset timing and incidence of undiagnosed finger symptom (UDFS) between various shoulder surgical procedures. In this study, UDFS symptoms included the following four symptoms in the fingers ; edema, limited range-of-motion, skin color changes, and abnormal sensations. UDFS cases were defined as those presenting with at least one UDFS. In result, the incidence rate of UDFS cases was 7.1% overall (58 / 816 shoulders), 7.4% (32 / 432) in arthroscopic rotator cuff repair (ARCR), 9.0% (11 / 122) in open rotator cuff repair (ORCR), 1.4% (2 / 145) in arthroscopic subacromial decompression (ASD), 13.2% (5 / 38) in open reduction and internal fixation (ORIF), 11.1% (3 / 27) in humeral head replacement, 4.8% (1 / 21) in anatomical total shoulder arthroplasty, and 12.9% (4 / 31) in reverse total shoulder arthroplasty cases. The Rate was significantly higher with ARCR compared to ASD (p < .01). About onset timing in weeks postoperatively, the ORIF group had a statistically earlier symptom onset than the Rotator cuff repair (ARCR + ORCR) group (2.4 weeks vs. 6.0 weeks, p < .01). When classifying the onset timing into before and after the removal of the abduction pillow, the ORIF group showed a statistically higher rate of onset before brace removal than the Rotator cuff repair groups (p < .01). Differences in UDFS among shoulder surgeries were demonstrated in this study
Evolution of the current system during solar wind pressure pulses based on aurora and magnetometer observations
Additional file 2: Figure S2. Same as Additional file 1 but for the July 14, 2012, event
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