Proton Scattering * - l - Richard

In this talk I will try to review some of the early experimrnts in the field of electron-proton scattering, concent.rnt,ing mostly on t,he inelastic scattering rxperimentn at SLAC. Ordinarily, t,hose experiments would be covered in the first. five or ten minutes of the talks by Professors Sruilli and Drrll, but (.his is a special yrar, and I will fwl free t.o rrminisce about the early days in a somewhat personal way. I was about three years old when Prof. Ncville Mot,t calculat,ed the scat.tcring of electrons described by the Dirnc equation from a massive point cha.rgr. Unlike many Nobel prize winners, I had not decided on a career in physics at that early age, and I didn’t encount.er c.his calculation until much later in my life. after I became a graduate student. at Stanford. The Mott cross sectionr’l for the scatt,ering of a relativistic electron can be written as da a2 co2 o/2 ds1= EZsin4 0 2 i (1)