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# A photon with an energy of 2.09 GeV creates a proton –antiproton pair in which the proton has a kinetic energy of 95.0 MeV. What is the kinetic energy of the antiproton?

## 118$M e V$

Nuclear Physics

Particle Physics

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### Video Transcript

in this question. We're looking at the production off the proton and anti proton. Now we're given that the energy of the photo on itself is two points your nine tv. All right? And we want to find what is to kinetic energy off t anti proton, right? We also given Daddy kinetic energy off the proton. Yes, 95 MTV. So we had a frank unity energy off anti proton. Now we need to used the idea of conservation of energy. Now the energy from the photons Iseki converter into the mess, right, The rest energies safty proton and antiproton s well s the kinetic energy offi proton and problems. Right? So both the rest energies Andy kinetic energy. So essentially e comma is close to rest energy off the proton just m p c square purse rest energy off the anti proton plus kinetic energy, often proton and not see plus kinetic energy off the anti proton. So we know that a mess off the proton antiproton the scene So basically, this is just two times off the rest energy off a proton. This energy of a proton is 98 point tree m e v. So two times off that and you know, when the energy of the proto on East 95 every v print And so we have everything that we need to point your 90 vsp ski was your night on techno tree Everybody right? And so, by doing some calculations, right, moving around the expression a bit should get the kinetic energy off our anti proton to be 118 Emily.