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SUMMARY:Precision tests of QED and nonstandard models by searching\nphoton
  - photon scattering in vacuum with high power lasers
DTSTART;VALUE=DATE-TIME:20091022T103000Z
DTEND;VALUE=DATE-TIME:20091022T113000Z
DTSTAMP;VALUE=DATE-TIME:20261107T060517Z
UID:indico-event-1718@indico.ific.uv.es
DESCRIPTION:We study how to search for photon-photon scattering in vacuum 
 at present petawatt laser facilities such as HERCULES\, and test Quantum E
 lectrodynamics and non-standard models like Born-Infeld theory or scenario
 s involving minicharged particles or axion-like bosons. First\, we compute
  the phase shift that is produced when an ultra-intense laser beam crosses
  a low power beam\, in the case of arbitrary polarisations. This result is
  then used in order to design a complete test of all the parameters appear
 ing in the low energy effective photonic Lagrangian. In fact\, we propose 
 a set of experiments that can be performed at HERCULES\, eventually allowi
 ng either to detect photon-photon scattering as due to new physics\, or to
  set new limits on the relevant parameters\, improving by several orders o
 f magnitude the current constraints obtained recently by PVLAS collaborati
 on. We also describe a multi-cross optical mechanism that can further enha
 nce the sensitivity\, enabling HERCULES to detect photon-photon scattering
  even at a rate as small as that predicted by QED. Finally\, we discuss ho
 w these results can be improved at future exawatt facilities such as ELI\,
  thus providing a new class of precision tests of the Standard Model and b
 eyond.\n\nhttps://indico.ific.uv.es/event/1718/
LOCATION:Dpto. de Física Teórica (UVEG) Sala Seminarios
URL:https://indico.ific.uv.es/event/1718/
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