Absorptive effects and power corrections in low x DGLAP evolution
Abstract We address a long standing problem concerning the scale behaviour of parton densities in the low x, low $$Q^2$$ Q2 domain. We emphasize the important role of absorptive corrections at low x and use knowledge of diffractive deep inelastic scattering to exclude the absorptive effect from conv...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2019-01-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | http://link.springer.com/article/10.1140/epjc/s10052-018-6515-4 |
| Summary: | Abstract We address a long standing problem concerning the scale behaviour of parton densities in the low x, low $$Q^2$$ Q2 domain. We emphasize the important role of absorptive corrections at low x and use knowledge of diffractive deep inelastic scattering to exclude the absorptive effect from conventional deep inelastic data. In this way we obtain a significantly different low x behaviour of the gluon density, which is now much better described by linear DGLAP evolution. Accounting also for a second power correction, which arises from the freezing of $$\alpha _s$$ αs at low $$Q^2$$ Q2 , leads to an essentially flat behaviour of the low x gluon density. |
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| ISSN: | 1434-6044 1434-6052 |