Claudio CIOFI degli ATTI DIFFRACTION on NUCLEI ... - QNP2012
Claudio CIOFI degli ATTI DIFFRACTION on NUCLEI ... - QNP2012
Claudio CIOFI degli ATTI DIFFRACTION on NUCLEI ... - QNP2012
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The total neutr<strong>on</strong> − Nucleus<br />
cross secti<strong>on</strong> at high energies:<br />
(M. Alvioli, C.d.A, et al Phys. Rev. C78(R),031601(2008) )<br />
nA<br />
tot [mb]<br />
140<br />
135<br />
130<br />
125<br />
120<br />
360<br />
340<br />
320<br />
460<br />
440<br />
420<br />
3200<br />
3100<br />
3000<br />
2900<br />
4 He<br />
12 C<br />
16 O<br />
208 Pb<br />
G<br />
+ G<br />
10 100<br />
IS<br />
p lab<br />
[Gev/c]<br />
G<br />
G SRC<br />
G SRC IS<br />
• No free parameters!!<br />
• Full SRC.<br />
10 100<br />
• Gribov inelastic shadowing at<br />
lowest order.<br />
• Main result: SRC increase the<br />
opacity, Gribov IS decreases<br />
it and depends up<strong>on</strong> energy,<br />
the two effects being of about<br />
the same order in this energy<br />
range.<br />
• What about higher order Gribov<br />
correcti<strong>on</strong>s<br />
C. Ciofi <str<strong>on</strong>g>degli</str<strong>on</strong>g> Atti<br />
14 <strong>QNP2012</strong>, Palaiseau, April 16-20, 2012
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