# On the collision of two projectiles on two targets in the BFKL approach

Regular Article - Theoretical Physics

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## Abstract

High-energy collisions of two nucleons on two nucleons are studied in the BFKL approach in the leading approximation in *α* _{ s } *N* _{ c }. Diagrams with redistribution of color are considered. It is found that intermediate BKP states consisting of four reggeized gluons give a contribution which may be leading in deuteron–deuteron scattering and thus experimentally observable.

## Keywords

Pomeron Exchange Projectile Nucleus Reggeized Gluon BFKL Approach Eikonal Function
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## Notes

### Acknowledgements

This work has been supported by grant RFFI 12-02-00356-a. The author is thankful to J.B. Bartels and G.P. Vacca for their interest in this study and helpful discussions. He also thanks the INFN and Universities of Bologna and Hamburg for hospitality.

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