Exam 30: Particle Physics

In addition to charge and baryon number, another conserved quantity in particle interactions is lepton number. The six leptons have lepton number +1 , and their antiparticles have lepton number -1 . The lepton numbers for each generation (electron, muon, tau) are separately conserved. For example, an electron has electron-lepton number +1 , while the electron antineutrino has electron-lepton number -1 . What is the missing particle $\mathrm{X}$ in the following reaction? $\rightarrow \overline{\mathrm{n}}+\mathrm{X}$

In addition to charge and baryon number, another conserved quantity in particle interactions is lepton number. The six leptons have lepton number +1 , and their antiparticles have lepton number -1 . The lepton numbers for each generation (electron, muon, tau) are separately conserved. For example, an electron has electron-lepton number +1 , while the electron antineutrino has electron-lepton number -1 . What is the missing particle $\mathrm{X}$ in the following decay? $\quad \pi^{+} \rightarrow X+v_{\mu}$

Baryons are composed of

The LHC is located at CERN in

Mesons are composed of

Accelerated electron beams are often used to study features of atoms on the surfaces of materials. If you wanted to alter the design of an electron accelerator to produce an electron beam appropriate for the studying the nuclei of atoms instead, what would be the appropriate alteration?

In addition to charge and baryon number, another conserved quantity in particle interactions is lepton number. The six leptons have lepton number +1 , and their antiparticles have lepton number -1 . The lepton numbers for each generation (electron, muon, tau) are separately conserved. For example, an electron has electron-lepton number +1 , while the electron antineutrino has electron-lepton number -1 . What is the missing particle $X$ in the following reaction? $\mu^{-+} p \rightarrow n+X$