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in p+pbar collisions at sqrt{s}

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γ+γ, γ+p, γ+A “Applic<strong>at</strong>ions”<br />

•Higgs as well as many SUSY ptcls should be produced <strong>at</strong> the LHC <strong>in</strong> γ+γ and γ+p (γ+A)<br />

•High energy photon <strong>in</strong>teractions <strong>at</strong> the LHC, de Jeneret et al, arXiv:0908.2020<br />

•FP220, FP420<br />

•Observ<strong>at</strong>ion of exclusive charmonium production and gamma+gamma to mu+mu- <strong>in</strong> <strong>p+pbar</strong><br />

<strong>collisions</strong> <strong>at</strong> <strong>sqrt</strong>{s} = 1.96 TeV, CDF, PRL102:242001,2009<br />

Nucleus-Nucleus Interactions<br />

−2<br />

10<br />

2 2<br />

x = mJ<br />

/ Ψ / WγA<br />

= 1.<br />

5x<br />

•Direct measurement of G(x) <strong>at</strong> from photoproduction (σ~g 2 (x))<br />

PHENIX UPC J/Psi<br />

10 -3 10 -2 10 -1 10 -3 10 -2 10 -1 10 -3 10 -2 10 -1<br />

EPS09: A New Gener<strong>at</strong>ion of NLO and LO Nuclear PDF’s, Eskola,Paukannen,Salgado JHEP 0904:065 2009<br />

•Possibly study dynamics of J/Ψ propag<strong>at</strong>ion through nuclear m<strong>at</strong>ter<br />

•Fe<strong>at</strong>ure or Bug?<br />

•Test of QED <strong>in</strong> strong-coupl<strong>in</strong>g regime?: α=Zα EM ~0.6<br />

ISSP-Erice Mickey Chiu 16 / 16<br />

x

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