The Spacetime Metric

In one minute

Della Valle, Milotti, Ejlli, Messineo, Piemontese and Zavattini report first results from the new PVLAS apparatus in Ferrara, which hunts for vacuum magnetic birefringence predicted by quantum electrodynamics. They measure a noise floor for the unitary-field vacuum birefringence of (4 ± 20) × 10^-23 T^-2 at one standard deviation. The value is compatible with zero, setting a new limit on vacuum birefringence from nonlinear electrodynamics. It narrows to a factor of 50 the gap to the first measurement of the QED value, 4 × 10^-24 T^-2. The data also tighten model-independent bounds on axion-like particles coupling to two photons above 1 meV and improve the fractional charge limit on millicharged particles by a factor of two.

First results from the new PVLAS apparatus: a new limit on vacuum magnetic birefringence

  1. F. Della Valle(Author)
  2. E. Milotti(Author)
  3. A. Ejlli(Author)
  4. G. Messineo(Author)
  5. L. Piemontese(Author)
  6. G. Zavattini(Author)
  7. U. Gastaldi(Author)
  8. R. Pengo(Author)
  9. G. Ruoso(Author)

Publication and identifiers

Work type
Paper
Year
2014
Identifiers
Original source links

Rights and access

This page presents metadata and links. It does not grant permission to reproduce, download or redistribute the source.

Recorded rights status
Linking only
Rights holder
American Physical Society (APS)

Citation fields

These are the recorded citation fields; no citation style or missing edition has been inferred.

Original title
First results from the new PVLAS apparatus: a new limit on vacuum magnetic birefringence
Attribution
  1. F. Della Valle(Author)
  2. E. Milotti(Author)
  3. A. Ejlli(Author)
  4. G. Messineo(Author)
  5. L. Piemontese(Author)
  6. G. Zavattini(Author)
  7. U. Gastaldi(Author)
  8. R. Pengo(Author)
  9. G. Ruoso(Author)
Year
2014
Identifiers
Original source links