Proton Neutron

FALSE PROOF OF VALENCE QUARKS

valquarks

 

In almost all books of Introduction to Particle Physics one finds this picture of the proton structure function F2 in terms of x for  q squared around 1 GeV squared. The authors state that this picture proves that there are 3 valence quarks in the proton, but this is completely false because the mass which is inserted into q squared is the proton mass divided by 3 and this means that one is proving that the proton has 3 constituent quarks and not 3 valence quarks because valence quarks are supposed to be very light. Have in mind that the sum of the masses of the 3 constituent quarks yields the proton mass of about 1 GeV.

As an example, I indicate Donald Perkins book Introduction to High Energy Physics, on p. 271. In my presentation at MORIOND 2014 on Quark Compositeness I show the internal structure of the proton which was experimentally found by the Nobel Prize winner R. Hofstadter at SLAC in the 1950s. Please click here for the presentation. Please, take a look at the post BIASED NUCLEON STRUCTURE.

FALSE PROOF OF VALENCE QUARKS

  In almost all books of Introduction to Particle Physics one finds this picture of the proton structure function F2 in terms of x for  q squared around 1 GeV squared. The authors state that this picture proves that there are 3 valence quarks in the proton, but this is completely false because the mass […]

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