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 number of collisi<strong>on</strong>s at impact parameter b is<br />
n AB<br />
coll<br />
σhN<br />
(b) =<br />
in<br />
P AB<br />
in<br />
T AB(b)<br />
• σin<br />
hN T AB(b) is affected neither by SRC nor by IS.<br />
• how to calculate Pin AB (b) The usual formula<br />
P AB<br />
in<br />
(b)<br />
(b) = 1 − exp[−σNNT<br />
AB h (b)]<br />
misses many terms of the Glauber theory. However, for<br />
large values of A A and A B the probability of no interacti<strong>on</strong><br />
exp[−σin<br />
NNT<br />
AB h (b)] is expected to be very small with or without<br />
the missed terms, the Gribov IS correcti<strong>on</strong>s and the effects of<br />
NN correlati<strong>on</strong>s. Except the very peripheral collisi<strong>on</strong>s Pin AB(b)<br />
≃ 1<br />
and it seems therefore that n AB<br />
coll<br />
is practically not affected by NN<br />
correlati<strong>on</strong>s and IS .<br />
in<br />
C. Ciofi <str<strong>on</strong>g>degli</str<strong>on</strong>g> Atti<br />
21 <strong>QNP2012</strong>, Palaiseau, April 16-20, 2012
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