Theory Of Cherenkov Radiation Research Articles

DISTINGUISHABILITY OF NEUTRINO FLAVORS THROUGH THEIR DIFFERENT SHOWER CHARACTERISTICS

We propose a new flavor identification method to distinguish mu and tau type ultra high energy cosmic neutrinos (UHECN). Energy loss of leptons in matter is an important information for the detection of neutrinos originated from high energy astrophysical sources. 50 years ago, Askaryan proposed to detect Cherenkov radiowave signals emitted from the negative charge excess of neutrino-induced particle shower. The theory of Cherenkov radiation under Fraunhofer approximation has been widely studied in the past two decades. However, at high energies or for high density materials, electromagnetic shower should be elongated due to the Landau-Pomeranchuck-Migdal (LPM) effect. As such the standard Fraunhofer approximation ceases to be valid when the distance between the shower and the detector becomes comparable with the shower length. Monte Carlo simulations have been performed recently to investigate this regime. Here we adopt the deduced relationship between the radio signal and the cascade development profile to investigate its implication to lepton signatures. Our method provides a straightforward technique to identify the neutrino flavor through the detected Cherenkov signals.

Study of the particle radiation near the Vavilov–Cherenkov radiation threshold

Abstract The Cherenkov radiation phenomenon is widely used in physics applications, mainly in particle identification or particle energy determination. The classical theory of Cherenkov radiation introduced by Tamm and Frank is sufficient for practical needs. However, it is not well known that another theory derived by Tamm exits. It predicts the interference character of the radiation and the classical Cherenkov ring as the main interference maximum is considered. Unlike the first theory, there is no threshold, the radiation under classical threshold is caused by a boundary effect in the medium crossed by the particle, known as transition radiation. The interference begins to be observable near the threshold where the difference between both theories is well noticeable.

On the microscopic theory of cherenkov radiation

The phenomenological theory of Cherenkov radiation was investigated. Both the motion of the particle responsible for the Cherenkov emission and the refractive properties of the medium through which this particle travels are given. The Maxwell equations are solved, and the energy lost by the particle is computed. (C.E.S.)

Теория эффекта Вавилова-Черенкова (III)

Теория эффекта Вавилова-Черенкова (III)