NNLO Parton Distributions for the LHC
| Autor: | Johannes Bluemlein, Sergey Alekhin, Sven-Olaf Moch |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Drell-Yan process
Quark data analysis method Particle physics correction [quantum chromodynamics] Parton Momentum colliding beams [hadron] deep inelastic scattering ddc:530 violation [scaling] mass [heavy quark] Scaling Quantum chromodynamics Physics flavor Large Hadron Collider High Energy Physics::Phenomenology parametrization Drell–Yan process Deep inelastic scattering 2 [higher-order] CERN LHC Coll High Energy Physics::Experiment distribution function [parton] |
| Zdroj: | Proceedings of Science (LL2018), 049 (2018). doi:10.22323/1.303.0049 Loops and Legs in Quantum Field Theory, LL2018, St. Goar, Germany, 2018-04-29-2018-05-04 |
| DOI: | 10.22323/1.303.0049 |
| Popis: | Loops and Legs in Quantum Field Theory, LL2018, ; Proceedings of Science (LL2018), 049 (2018). doi:10.3204/PUBDB-2018-03372 We consider some trends, achievements and a series of remaining problems in the precision determination of parton distribution functions. For the description of the scaling violations of the deep-inelastic scattering data, forming the key ingredients to all PDF fits, a solid theoretical framework is of importance. It is provided by the fixed flavor number scheme in describing the heavy-quark contributions which is found in good agreement with the present experimental data in a very wide range of momentum transfers. In this framework also a consistent determination of the heavy-quark masses is possible at high precision. The emerging Drell-Yan data measured at hadron colliders start to play a crucial role in disentangling the quark species, particularly at small and large values of $x$. These new inputs demonstrate a good overall consistency with the earlier constraints on the PDFs coming from fixed-target experiments. No dramatic change is observed in the PDFs in case of a consistent account of the higher-order QCD corrections and when leaving enough flexibility in the PDF shape parameterization. Published by SISSA, Trieste |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|