3,735 research outputs found
GMOR-like relation in IR-conformal gauge theories
A generalization of the GMOR relation to the case of infrared-conformal gauge
theories is discussed. The starting point is the chiral Ward identity
connecting the isovector pseudoscalar susceptibility to the chiral condensate,
in a mass-deformed theory. A renormalization-group analysis shows that the
pseudoscalar susceptibility is not saturated by the lightest state, but a
contribution from the continuum part of the spectrum survives in the chiral
limit. The computation also shows how infrared-conformal gauge theories behave
differently, depending on whether the anomalous dimension of the chiral
condensate be smaller or larger than 1.Comment: 28 pages, 1 PDF figur
Axion search with a quantum-limited ferromagnetic haloscope
A ferromagnetic axion haloscope searches for Dark Matter in the form of
axions by exploiting their interaction with electronic spins. It is composed of
an axion-to-electromagnetic field transducer coupled to a sensitive rf
detector. The former is a photon-magnon hybrid system, and the latter is based
on a quantum-limited Josephson parametric amplifier. The hybrid system consists
of ten 2.1 mm diameter YIG spheres coupled to a single microwave cavity mode by
means of a static magnetic field. Our setup is the most sensitive rf
spin-magnetometer ever realized. The minimum detectable field is
T with 9 h integration time, corresponding to a limit on
the axion-electron coupling constant at 95% CL.
The scientific run of our haloscope resulted in the best limit on DM-axions to
electron coupling constant in a frequency span of about 120 MHz, corresponding
to the axion mass range -eV. This is also the first apparatus
to perform an axion mass scanning by changing the static magnetic field.Comment: 4 pages, 4 figure
Clinical associations of serum antiendothelial cell antibodies in patients with sudden sensorineural hearing loss
Objectives/Hypothesis: The role of antiendothelial cell antibodies in systemic vasculitis has been reported. The. aim of the study was to define the clinical associations of serum antiendothelial cell antibodies in patients with sudden sensorineural hearing loss. Study Design: A prospective study in patients with sudden sensorineural hearing loss. Methods: Serum samples were taken from 59 consecutive patients with sudden sensorineural hearing loss at time of presentation and from 28 normal control subjects. Indirect immunofluorescence assay was used to detect antiendothelial cell antibodies. Results: The prevalence of antiendothelial cell antibody detection was 54% (32 of 59 patients), with a statistically significant difference between patients and control subjects (P = .0064). Antiendothelial cell antibody positivity was significantly associated with absent recovery of hearing loss (P = .0020). Conclusions: The cytotoxicity to endothelial cells of the inner ear by antiendothelial cell antibody-positive sera might play a role in causing the stria vascularis damage in immune-mediated sudden sensorineural deafness. The appearance of antiendothelial cell antibody is related to the poor outcome of hearing loss, and its detection could be helpful in the selection of particular patients with sensorineural hearing loss for specific immunosuppressive treatments
Robot-Assisted Laparoscopic Vesiculectomy for Large Seminal Vesicle Cystadenoma: A Case Report and Review of the Literature
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