Naslov
Cold Case: Nucleon Form Factor, factor of 2

Autori
Duplančić, Goran

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, neobjavljeni rad, znanstveni

Skup
Light-Cone Distribution Amplitudes of Hadrons in QCD and their Applications

Mjesto i datum
Mainz, Njemačka, 13.01.2020. - 24.01.2020

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
nucleon ; form factor ; distribution amplitudes

Sažetak
Calculation of electromagnetic nucleon form factor in perturbative QCD is an old and seamingly over-discussed story, but there is still a shadow hanging over that straightforward calculation. Namely, there is factor of 2 discrepancy among results obtained by different groups. The usual suspects were normalizations of the nucleon wave function. Different explanations were offered but without conclusive answer and the final statement was that there are simply two different normalizations which both are equally reasonable. Consequently, the problem appeared: two different physical results. The unpleasant situation was circumvented by taking ratio between various amplitudes and everyone was happy. But no one should be. Years passed, we stumbled upon the problem, decided to reopen the case and definitely solve the mystery. The outcome was surprising and, of course, the answer was where no one expected it.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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