The Plot Of The Week - Trileptons From Internal Conversions
Friday, October 28, 2011 - 06:30
in Physics & Chemistry
A process which caught some of the LHC Higgs analysts by surprise in the recent run of analyses for summer 2011 conferences is the production of multiple-lepton events by a process called "internal photon conversion in Z events". What is it, and how can we size it up ? The conversion of a real, energetic photon into a fermion-antifermion pair readily occurs when the particle traverses a medium: the process is also known as "pair production", and is the leading form of energy loss of energetic photons in matter. It is thanks to it (and to the related process called "bremsstrahlung" of energetic electrons) that our electromagnetic calorimeters can measure electrons and photons! read more
