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On the use of a running coupling in the calculation of forward hadron production at next-to-leading order
B. DuclouéAlfred H. MuellerGregory SoyezD.n. TriantafyllopoulosEdmond IancuTuomas LappiY. Zhusubject
Nuclear and High Energy Physicslead: targetHadronFOS: Physical sciencesPosition and momentum spacehiukkasfysiikka114 Physical sciences01 natural sciencesColor-glass condensatesymbols.namesakecoupling constant: energy dependenceHigh Energy Physics - Phenomenology (hep-ph)0103 physical sciencesStatistical physicshadron: productionCoordinate space010306 general physicsCouplingPhysicsenergy: highta114010308 nuclear & particles physicssaturationhigher-order: 1Order (ring theory)High Energy Physics - Phenomenology* Automatic Keywords *Fourier transform[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]Color Glass Condensatesymbolsp nucleusOrder of magnitudedescription
We study a puzzle raised recently regarding the running coupling prescription used in the calculation of forward particle production in proton-nucleus collisions at next-to-leading order: using a coordinate space prescription which is consistent with the one used in the high energy evolution of the target leads to results which can be two orders of magnitude larger than the ones obtained with a momentum space prescription. We show that this is an artefact of the Fourier transform involved when passing between coordinate and momentum space and propose a new coordinate space prescription which avoids this problem.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-05-14 | Nuclear Physics A |