DPS mechanism for associated $c\bar{c} l^+l^-$ production in $AA$ UPCs as a probe for photon density inside the nucleus
| Autor: | Huayra, Edgar, de Oliveira, Emmanuel G., Pasechnik, Roman, Stahlhöfer, Bruna O. |
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| Rok vydání: | 2021 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | We discuss the associated $c\bar{c}$ and $l^+l^-$ pairs production in ultraperipheral heavy-ion collisions at high energies. Such a channel provides a novel probe for double-parton scattering (DPS) at small $x$ enabling one to probe the photon density inside the nucleus. We have derived an analog of the standard central $pp$ pocket formula and studied the kinematical dependence of the effective cross section. Taking into account both elastic and non-elastic contributions, we have shown predictions for the DPS $c\bar c l^+l^-$ production cross section differential in charm quark rapidity and dilepton invariant mass and rapidity for LHC and a future collider. Comment: 15 pages, 11 figures |
| Databáze: | arXiv |
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