ZZ diboson

ZZ dibosons are rare pairs of Z bosons that are extremely difficult to detect. They were first observed by the scientists of DZero collaboration at the US Department of Energy’s Fermilab. They are force-carrying particles produced in proton-antiproton collisions at the Tevatron, the world’s second highest-energy particle accelerator (after the CERN LHC). The observation of the ZZ dibosons was announced at a Fermilab seminar on July 25, 2008 [http://www.fnal.gov/pub/presspass/press_releases/Dzero_zzdiboson.html] .The rarest diboson processes after ZZ dibosons are those involving the Higgs boson, so seeing ZZ diboson is an essential step in demonstrating the ability to see the Higgs boson.ZZ diboson is the latest in a series of observations of pairs of the so-called gauge bosons, or force-carrying particles, by DZero and its sister Tevatron experiment at CDF.

Final analysis of the data for this discovery was done by a team of international researchers including scientists of American, Belgian, British, Georgian, Italian and Russian nationalities. The observations began with the study of the already rare production of W bosons plus photons; then Z bosons plus photons; then observation of W pairs; then WZ. The ZZ is the most massive combination and has the lowest predicted likelihood of production in the Standard Model.

References

ee also

Higgs boson

Hadrons

Particle physics

Elementary particle

List of particles

Subatomic particle

Quantum mechanics

Quanta

Antimatter

Particle accelerator

External Link

* [http://www.fnal.gov/pub/presspass/press_releases/Dzero_zzdiboson.html] Fermilab Press Release
* [http://www.fnal.gov/pub/presspass/images/DZero-zz-pairs.html] Photos and graphics
* [http://www.iop.org/EJ/article/1742-6596/110/4/042026/jpconf8_110_042026.pdf?request-id=4d62d747-c371-437b-911a-dcf443de878d] Diboson Physics at CDF by Anna Sfyrla