Different groups publish their results in different formats, have you checked out their respective websites?Elham1990 said:I don't have other groups data
Parton Distribution Functions (PDFs) describe the probability distribution of quarks and gluons (collectively known as partons) inside a proton or neutron as a function of the parton's momentum fraction and the energy scale of the interaction. They are essential for making predictions in high-energy physics, particularly in processes involving the strong force, such as those studied at particle colliders like the Large Hadron Collider (LHC).
Comparing PDFs without data from other groups is challenging because PDFs are typically derived from global fits to experimental data from various high-energy physics experiments. These fits involve complex statistical analyses and theoretical models. Without access to the experimental data and the methodologies used by other groups, it becomes difficult to independently validate or compare the results.
To compare PDFs without external data, one can use theoretical consistency checks, such as verifying the sum rules (e.g., momentum and baryon number conservation) and comparing the PDFs against known theoretical predictions or constraints. Additionally, one can perform cross-checks using different parameterizations or fitting techniques within their own data set to ensure robustness and consistency.
Theoretical predictions, such as those from Quantum Chromodynamics (QCD) and perturbative calculations, can provide benchmarks for comparing PDFs. By ensuring that the PDFs satisfy theoretical constraints and match predictions from well-established models, one can gain confidence in their accuracy. This approach helps in identifying discrepancies that might arise from different fitting procedures or assumptions.
Sum rules are integral constraints that PDFs must satisfy based on fundamental properties of the proton or neutron. For example, the momentum sum rule requires that the total momentum carried by all partons equals the momentum of the proton. Verifying that PDFs satisfy these sum rules is crucial for ensuring their physical validity and provides a way to compare different sets of PDFs consistently.