English

Comment on "The New F_L Measurement from HERA and the Dipole Model"

High Energy Physics - Phenomenology 2015-06-04 v1

Abstract

The upper bound on the ratio of the proton structure functions FL/F2F_L/F_2 tested in the recent paper "The New FLF_L Measurement from HERA and the Dipole Model", contrary to what is said therein, does not provide a model-independent "rigorous" experimental test of the color-dipole picture. The validity of the theoretical upper bound depends on an ad hoc assumption on the dipole cross section. -- The analysis in the paper "The New FLF_L Measurement from HERA and the Dipole Model" can be reinterpreted as an additional confirmation of the absolute model-independent prediction from the color-dipole picture of FL=0.27F2F_L = 0.27 F_2.

Keywords

Cite

@article{arxiv.1204.5647,
  title  = {Comment on "The New F_L Measurement from HERA and the Dipole Model"},
  author = {Dieter Schildknecht},
  journal= {arXiv preprint arXiv:1204.5647},
  year   = {2015}
}