| Issue |
EPJ Web of Conferences
Volume 112, 2016
6th International Conference on Physics Opportunities at an Electron-Ion Collider
|
|
|---|---|---|
| Article Number | 02012 | |
| Number of page(s) | 5 | |
| Section | Small-x and Saturation | |
| DOI | https://doi.org/10.1051/epjconf/201611202012 | |
| Published online | 21 March 2016 | |
https://doi.org/10.1051/epjconf/201611202012
Di-photon versus di-hadron correlations in p+A collisions
1 Dept. of Physics, University of Connecticut, High, Storrs, CT 06269, USA
2 Departamento de Física, Universidad Técnica Federico Santa María, Avda. España 1680, Casilla 110-V, Valparaiso, Chile
3 Centro Científico Tecnológico de Valparaíso (CCTVal), Universidad Técnica Federico Santa María, Casilla 110-V, Valparaíso, Chile
a e-mail: Amir.Rezaeian@usm.cl
Published online: 21 March 2016
We study the di-photon correlations in quark-nucleus and proton-nucleus collisions at RHIC and the LHC.We show that the single fragmentation di-photon produces the away side correlations peak, and the double fragmentation component of prompt diphoton is responsible for the near-side peak, and the long-range in rapidity near-side azimuthal collimation, the so-called “ridge” structure. We show that while di-photon ridge exists at the LHC in quark-nucleus collisions, the effect disappears in proton-nucleus collisions at the LHC. We show that the di-photon correlation measurments in p+A collisions can help to discriminate among models and understand the true origin of the observed dihedron ridge in p+A collisions.
© Owned by the authors, published by EDP Sciences, 2016
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