Speaker
Krzysztof Golec-Biernat
(Institute of Nuclear Physics, Cracow, Poland)
Description
We show that the momentum sum rule is a necessary condition for factorization of double parton distributions into a product of two single parton distributions for small values of the parton momentum fractions $x$ and large enough values of the evolution scale $Q^2$. This is a somewhat surprising result since the momentum sum rule involves integration over all values of the momentum fraction. In essence, the momentum sum rule provides a proper relation between the double and single parton distributions, which is necessary for the small $x$ factorization at large $Q^2$.
Author
Krzysztof Golec-Biernat
(Institute of Nuclear Physics, Cracow, Poland)
Co-author
Prof.
Anna Staśto
(Penn State University)
