Volume 256 - 34th annual International Symposium on Lattice Field Theory (LATTICE2016) - Hadron Structure
Double Parton Distributions of the Pion
C. Zimmermann
Full text: pdf
Pre-published on: 2016 December 27
Published on: 2017 March 24
Abstract
The effects of double hard interactions are no longer negligible at energy scales reached at the LHC. Double parton scattering (DPS) processes are often described by taking the product of two single parton scattering processes assuming that interference effects are very small. We calculate four point functions (4pt-functions), which appear in the the DPS cross section, employing lattice techniques. We consider a pion at rest and test the validity of the afore-mentioned factorization assumption by convoluting two pion form factors and comparing the result to the 4pt data. For our calculations we use a $$N_f = 2$$ gauge ensemble on a $$40^3 \times 64$$ lattice, with lattice spacing $$a = 0.071 \mathrm{fm}$$ and pion mass $$m_{\pi} = 288.8 \mathrm{MeV}$$.
DOI: https://doi.org/10.22323/1.256.0152
Open Access