Electron-Proton Scattering at High-Momentum Transfer

Measurement of theN*−−N*++Mass Difference

“…In the baryon octet, for example, the prediction 7 of E~~-S°=S~-2++p-n has been experimentally confirmed. 8 9 where Q is the charge and a and b are constants.…”

“…At this energy reactions (1) and (2) are known to proceed almost entirely via N*~ and N^+ + production, respectively. 2 ' 8 We determined Scoo and 5TQ by a comparison of the distributions in the invariant mass W23 for both reactions.…”

Precise Form Factors

“…This is shown in Fig. 1, which contains not only the Stanford Linear Acclerator Center data 6 but the Stanford, 7 Cambridge Electron Accelerator, 8 Cornell, 9 and DESY data. 10 The horizontal line R = 1 thus represents the usual dipole approximation.…”

“…To illustrate this, let us consider the se-quence of the photon, the oo meson, the cp meson, and presumably, some heavier neutral vector mesons, which have the same tensorial type and same isospin. A coupling of photon with nucleon may be made with the mediation of these bosons, 14 so that their effects are expressed by (9). To regularize the field of the lightest member of the sequence (here the photon), one sets A^ = A2 = A o>> A 3 =A 4 =A <p> and A 5 = A 6 = A^ arriving at a form factor identical with Eq.…”

Gluboko-neuprugoe rasseyanie: Rannie gody

“…24) и новый тип монитора [19]. Корнелльские результаты открыли путь к использованию электрического и магнитного формфактора [20] (G E и G M ), тогда как раньше изучали один формфактор для (дираковского) протона спина 1/2, а в качестве второго использовался формфактор "аномального" магнитного момента про тона.…”