$Q^2$ Independence of $QF_2/F_1$, Poincare Invariance and the Non-Conservation of Helicity

Details $Q^2$ Independence of $QF_2/F_1$, Poincare Invariance and the Non-Conservation of Helicity $Q^2$ Independence of $QF_2/F_1$, Poincare Invariance and the Non-Conservation of Helicity

2002-01-09

arxiv.org/abs/nucl-th/0201021v4

Phys.Rev. C65 (2002) 065205

Physics

Nuclear Physics

Nuclear Theory

13 pages, 7 figures, to be submitted to Phys. Rev. C typos corrected, references added, 1 new figure to show very high Q^2 beh

Scientific paper

10.1103/PhysRevC.65.065205

A relativistic constituent quark model is found to reproduce the recent data
regarding the ratio of proton form factors, $F_2(Q^2)/F_1(Q^2)$. We show that
imposing Poincare invariance leads to substantial violation of the helicity
conservation rule, as well as an analytic result that the ratio
$F_2(Q^2)/F_1(Q^2)\sim 1/Q$ for intermediate values of $Q^2$.

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