Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quasi-PDFs from Twisted mass fermions at the physical point   We present results for the flavor non-singlet u-d parton distribution
functions within the nucleon using the quasi-PDF approach. The lattice
calculation is performed by employing the twisted mass formulation and two
gauge ensembles, having $N_f = 2$ and $N_f = 2 + 1 + 1$ dynamical fermions with
masses tuned to their physical value. For the $N_f = 2$ physical point
ensemble, the unpolarized, helicity and transversity distributions are computed
for three values of the nucleon momentum, namely [6, 8, 10]$\pi/L$
corresponding to [0.83,1.11,1.38] GeV. Upon renormalization, we find that, as
the nucleon momentum increases, the lattice results approach the
phenomenological distributions resulting from analyses of deep inelastic
scattering data, opening a promising path for a direct evaluation of parton
distributions from the QCD Lagrangian. For the $N_f = 2 + 1 + 1$ physical point
ensemble, we present preliminary results for the unpolarized distribution
extracted from a nucleon boosted by $8\pi/L$ or 0.97 GeV.

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The categories of this paper are: chem-ph
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The categories of this paper are: adap-org
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The categories of this paper are: nucl-th
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The categories of this paper are: quant-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: econ
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The categories of this paper are: q-bio
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The categories of this paper are: supr-con
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The categories of this paper are: hep-ex
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The categories of this paper are: astro-ph
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The categories of this paper are: funct-an
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The categories of this paper are: dg-ga
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The categories of this paper are: plasm-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: bayes-an