Transverse momentum distributions of quarks from the lattice using extended gauge links
| Autor: | Musch, Bernhard U., Hägler, Philipp, Schäfer, Andreas, Göckeler, Meinulf, Renner, Dru B., Negele, John W., Collaboration, LHPC |
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| Rok vydání: | 2007 |
| Předmět: | |
| Zdroj: | PoSLAT2007:155,2007 |
| Druh dokumentu: | Working Paper |
| Popis: | We present preliminary numerical studies in Lattice QCD related to the intrinsic transverse momentum distribution of partons in the nucleon. We employ non-local operators, consisting of spatially separated quark creation and annihilation operators connected by a straight Wilson line. A clear signal is already obtained from a small number of configurations at a pion mass of about 600 MeV. As an example, we demonstrate that we can obtain the first x-moment of the transverse momentum dependent parton distribution function f_1^{n=1}(k_T) from our data. Our results, which are not renormalized, show a Gaussian-like distribution. The root mean squared transverse momentum is about 560 MeV for a Gaussian fit, close to phenomenological values. Comment: 7 pages, 7 figures, presented at the XXV International Symposium on Lattice Field Theory, July 30 - August 4 2007, Regensburg, Germany |
| Databáze: | arXiv |
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