particle physics Particle physics or high-energy physics is the study of Elementary particle, fundamental particles and fundamental interaction, forces that constitute matter and radiation. The field also studies combinations of elementary particles up to the s ...

, the Glashow resonance is the resonant formation of the

W boson In particle physics, the W and Z bosons are vector bosons that are together known as the weak bosons or more generally as the intermediate vector bosons. These elementary particles mediate the weak interaction; the respective symbols are , , an ...

antineutrino A neutrino ( ; denoted by the Greek letter ) is an elementary particle that interacts via the weak interaction and gravity. The neutrino is so named because it is electrically neutral and because its rest mass is so small ('' -ino'') that it ...

-electron collisions: + → .

History

The resonance was proposed by

Sheldon Glashow Sheldon Lee Glashow (, ; born December 5, 1932) is a Nobel Prize-winning American theoretical physicist. He is the Metcalf Professor of Mathematics and Physics at Boston University, and a Eugene Higgins Professor of Physics, emeritus, at Harv ...

in 1959.

Theory

The threshold antineutrino energy for this process (for the electron at rest in the laboratory frame) is given by the formula :

E_\nu = \frac \approx \frac

(here is, for completeness, included also the antineutrino mass, which vanishes in the

Standard Model The Standard Model of particle physics is the Scientific theory, theory describing three of the four known fundamental forces (electromagnetism, electromagnetic, weak interaction, weak and strong interactions – excluding gravity) in the unive ...

), which gives 6.3

PeV PEV or PeV may refer to: * Ecologist Party "The Greens" (), a Portuguese eco-socialist political party * Green Ecologist Party (Chile), a Chilean eco-leftist political party * Evangelical People's Party of Switzerland (), a Protestant Christian- ...

, a huge energy for a fundamental particle. This process is considered for the detection and studies of high-energy cosmic neutrinos at the IceCube experiment, at the ANTARES neutrino telescope, and at the KM3NeT neutrino telescope.

Detection

A report observing the resonance at 2.3 σ level has been made by the IceCube experiment in March 2021.

References

Electroweak theory Neutrino astronomy Hypotheses in physics {{Particle-stub