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Nucleon quasi-Parton Distributions in the large N$_c$ limit

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 نشر من قبل Hyeon-Dong Son
 تاريخ النشر 2019
  مجال البحث
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In this letter, we investigate the nucleon quasi-parton distribution functions in the chiral quark soliton model. We derive a set of sum-rules depending on the velocity of the nucleon and on the Dirac matrix defining the distribution functions. We present numerical results for the isosinglet unpolarized distribution, in which we find that the anti-quark distribution breaks the positivity condition at nucleon velocities $vapprox 0.99;(P_Napprox 7.0 M_N)$ and smaller. We found that, for the isosinglet unpolarized case, a large nucleon momentum is required for the quasi-parton distribution to get close enough to the usual parton distribution function.



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