Spatial distribution of angular momentum inside the nucleon
نویسندگان
چکیده
منابع مشابه
Spin and Orbital Angular Momentum Distribution Functions of the Nucleon
A theoretical prediction is given for the spin and orbital angular momentum distribution functions of the nucleon within the framework of an effective quark model of QCD, i.e. the chiral quark soliton model. An outstanding feature of the model is that it predicts fairly small quark spin fraction of the nucleon ∆Σ ≃ 0.35, which in turn dictates that the remaining 65% of the nucleon spin is carri...
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We introduce gauge-invariant quark and gluon angular momentum distributions after making a generalization of the angular momentum density operators. From the quark angular momentum distribution, we define the gauge-invariant and leading-twist quark orbital angular momentum distribution Lq(x). The latter can be extracted from data on the polarized and unpolarized quark distributions and the off-...
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mation about the Collins and Sivers mechanisms, which are signals for the transverse parton distribution function hq1 in convolution with the Collins fragmentation function H⊥,q 1 , and of the Sivers distribution function f ⊥,q 1T with the spin-averaged fragmentation function Dh q , respectively. Furthermore, both the momentum and helicity distributions of the strange quark sea have been extrac...
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The nucleon spin problem raises experimental and theoretical questions regarding the contribution of the orbital angular momentum of the quarks to the total spin of the nucleon. In this article we examine the commutation relationships of various operators that contribute to the total angular momentum of the nucleon. We find that the sum of the orbital plus gluon field angular momenta should sat...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2018
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2017.11.018