in p+pbar collisions at sqrt{s}
in p+pbar collisions at sqrt{s}
in p+pbar collisions at sqrt{s}
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J/ψ cross section vs theoretical calcul<strong>at</strong>ions<br />
⇒ dσ/dy | y=0 = 76 ± 31 (st<strong>at</strong>) ±15 (syst) µb<br />
<strong>in</strong>coherent<br />
coherent<br />
[ 1) P.R.L.89 012301 (2002)…]<br />
[ 2) P.L.B626 (2005) 72 ]<br />
[ 3) arXiv0706.2810 [hep-ph] ]<br />
[ 4) arXiv:0706.1532 [hep-ph] ]<br />
[ 1) ]<br />
[ 2) ]<br />
[ 3) ]<br />
[ 4) ]<br />
• Comp<strong>at</strong>ible with coherent<br />
predictions,<br />
• Sensitive to the shadow<strong>in</strong>g<br />
parameteriz<strong>at</strong>ions,<br />
• but... measured pt spectra<br />
suggests both coherent (γΑ) and<br />
<strong>in</strong>coherent (γN) J/ψ production<br />
coherent<br />
[Filho et al, PRC78 044904 (2008)]<br />
ISSP-Erice Mickey Chiu 13 / 16
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