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Laser-assisted muon decay.

Ai-Hua Liu1, Shu-Min Li, Jamal Berakdar

  • 1Department of Modern Physics, University of Science and Technology of China, P.O. Box 4, Hefei, Anhui 230026, People's Republic of China.

Physical Review Letters
|August 7, 2007
PubMed
Summary
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Strong laser fields can dramatically shorten muon lifetimes. Theoretical calculations show a CO(2) laser significantly alters muon decay rates, offering new insights into particle physics.

Area of Science:

  • Theoretical physics
  • Particle physics
  • Quantum electrodynamics

Background:

  • Muons are fundamental particles that undergo beta decay.
  • Understanding particle decay processes is crucial in high-energy physics.
  • External fields can potentially influence particle decay rates.

Purpose of the Study:

  • To theoretically investigate the effect of strong laser fields on muon lifetime.
  • To evaluate the impact of multiphoton processes on muon decay.
  • To analyze the dependence of muon decay rate on laser parameters.

Main Methods:

  • Theoretical evaluation of S-matrix elements.
  • Inclusion of all relevant electronic multiphoton processes.
  • Modeling the muon within a strong linearly polarized laser field.

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Main Results:

  • A CO(2) laser field with an amplitude of 10^6 V/cm can reduce the muon lifetime by an order of magnitude.
  • The muon decay rate is shown to be dependent on laser frequency and intensity.
  • Electronic multiphoton processes play a significant role in modifying the decay rate.

Conclusions:

  • Strong laser fields offer a novel method to dramatically alter muon lifetimes.
  • Theoretical predictions suggest significant modifications to fundamental particle decay.
  • Further experimental investigation is warranted to confirm these theoretical findings.