Probing impact-parameter dependent nuclear parton densities from double-parton scatterings in heavy-ion collisions
| Autor: | Shao, Hua-Sheng |
|---|---|
| Přispěvatelé: | Laboratoire de Physique Théorique et Hautes Energies (LPTHE), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
energy: high
heavy ion: scattering [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th] Nuclear Theory Glauber parton: distribution function nucleus nucleus: scattering [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] parton: multiple scattering [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] effect: geometrical [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] Nuclear Experiment parton: density impact parameter: dependence p nucleus: scattering |
| Popis: | We propose a new method to determine the spatially or impact-parameter dependent nuclear parton distribution functions (nPDFs) using the double-parton scattering (DPS) processes in high-energy heavy-ion (proton-nucleus and nucleus-nucleus) collisions. We derive a simple generic DPS formula in nuclear collisions by accommodating both the nuclear collision geometry and the spatially-dependent nuclear modification effect, under the assumption that the impact-parameter dependence of nPDFs is only related to the nuclear thickness function. While the geometric effect is widely adopted, the impact of the spatially-dependent nuclear modification on DPS cross sections is overlooked so far, which can however be significant when the initial nuclear modification is large. In turn, the DPS cross sections in heavy-ion collisions can provide useful information on the spatial dependence of nPDFs. They can be in general obtained in minimum-bias nuclear collisions, featuring the virtue of independence of the Glauber modeling. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|