Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2002-04-28
Phys.Lett. B551 (2003) 284-290
Physics
Nuclear Physics
Nuclear Theory
14 pages,1 Fig, tex file
Scientific paper
10.1016/S0370-2693(02)03052-6
We consider a generalized convolution, linking Structure Functions (SF) $F^N_2$ for nucleons, $F^A_2$ for a physical nucleus and $f^{PN,A}$ for a nucleus, composed of point-nucleons. In order to extract $F_2^n$ we employ data on $F_2^{p,A}$ and the computed $f^{PN,A}$. Only for $Q^2\approx 3.5 {\rm GeV}^2$ do data permit the extraction of $F_2^A(x,3.5)$ over a sufficiently wide $x$-range. Applying Mellin transforms, the above relation between SF turns into an algebraic one, which one solves for the Mellin transform of the unknown $F_2^n$. We present inversion methods leading to the desired $F_2^n$, all using a parametrization for $C(x,Q^2)=F_2^n(x,Q^2)/F_2^p(x,Q^2)$. Imposing motivated constraints, the simplest parametrization leaves one free parameter $C(x=1,Q^2)$. For $Q^2= 3.5 {\rm GeV}^2$ its average over several targets and different methods is $
Rinat A. S.
Taragin M. F.
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