You can use the Cauchy distribution to see how well hypothesis tests that assume normality behave when data are from a different distribution. You can also use the Cauchy distribution to test how well robust techniques work under a variety of distributional assumptions. The Cauchy distribution is widely used in physics.
The Cauchy distribution is a continuous distribution that is defined by its location and scale parameters.
The Cauchy distribution is also known as the Lorentz distribution.