2017/10/17 by Constantia Alexandrou, Simone Bacchio, Krzysztof Cichy +6 · 19 citations
Physics and Astronomy · #Computation #Fermion #Helicity #High-Energy Particle Collisions Research #Momentum (technical analysis) #Particle physics theoretical and experimental studies #Parton #Pion #Proton #Quantum Chromodynamics and Particle Interactions #Renormalization #hep-lat
paper · pdf · doi:10.1051/epjconf/201817514008
published in EPJ Web of Conferences 175, 14008 (EDP Sciences) · 8 pages, 6 figures; Proceedings of the 35th International Symposium on Lattice Field Theory, Granada, Spain
arxiv created 2017/10/17 · openalex created_date 2017/11/10 · openalex publication_date 2018/01/01 · arxiv updated 2018/04/18 · openalex updated_date 2026/08/06
We show the first results for parton distribution functions within the proton at the physical pion mass, employing the method of quasi-distributions. In particular, we present the matrix elements for the iso-vector combination of the unpolarized, helicity and transversity quasi-distributions, obtained with N f = 2 twisted mass cloverimproved fermions and a proton boosted with momentum [see formula in PDF] = 0.83 GeV. The momentum smearing technique has been applied to improve the overlap with the proton boosted state. Moreover, we present the renormalized helicity matrix elements in the RI’ scheme, following the non-perturbative renormalization prescription recently developed by our group.