Computation of Structure Functions From a Lattice Hamiltonian

Details Computation of Structure Functions From a Lattice Hamiltonian Computation of Structure Functions From a Lattice Hamiltonian

1995-06-08

arxiv.org/abs/quant-ph/9506011v2

Physics

Quantum Physics

11 pages, three figures available from the author (minor changes) To be submitted as a letter

Scientific paper

We suggest to compute structure functions in the Hamiltonian formalism on a momentum lattice using a physically motivated regularisation that links the total parton number to the lattice size. We show for the $\phi ^4 _4$ theory that our method allows to describe continuum physics. The critical line and the renormalised mass spectrum close to that critical line are computed and scaling behaviour is observed in good agreement with the semi-analytical results of L{\"u}scher and Weisz and with other lattice simulations. We also demonstrate that our method is able to reproduce the $Q^2$ behaviour of deep inelastic structure functions and the typical peak at $x_B=0.$

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