We argue that the process γ+A→J/ψ+"gap"+X at large momentum transfer q2 provides a quick and effective way to test the onset of a novel perturbative QCD regime of strong absorption for the interaction of small dipoles at the collider energies. We find that already the first heavy-ion run at the LHC will allow one to study this reaction with sufficient statistics via ultraperipheral collisions, hence probing the interaction of qq̄ dipoles of sizes ∼0.2fm with nuclear media down to x∼10-5.
|Original language||English (US)|
|Journal||Physical review letters|
|State||Published - Jun 9 2009|
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)