Parton transverse momentum and orbital angular momentum distributions
نویسندگان
چکیده
منابع مشابه
Orbital Angular Momentum Parton Distributions in Quark Models
At the low energy, hadronic, scale we calculate Orbital Angular Momentum (OAM) twist-two parton distributions for the relativistic MIT bag model and for nonrelativistic quark models. We reach the scale of the data by leading order evolution in perturbative QCD. We confirm that the contribution of quarks and gluons OAM to the nucleon spin grows with Q, and it can be relevant at the experimental ...
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We study the quark angular momentum distribution in the nucleon within a light-front covariant quark model. Special emphasis is put into the orbital angular momentum: a quantity which is very sensitive to the relativistic treatment of the spin in a light-front dynamical approach. Discrepancies with the predictions of the low-energy traditional quark models where relativistic spin effects are ne...
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Xiangdong Ji, 2, 3 Xiaonu Xiong, 4 and Feng Yuan INPAC, Department of Physics, and Shanghai Key Lab for Particle Physics and Cosmology, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China Center for High-Energy Physics, Peking University, Beijing, 100080, P. R. China Maryland Center for Fundamental Physics, University of Maryland, College Park, Maryland 20742, USA Nuclear Science Divis...
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Transverse momentum distribution of gauge bosons W± and Z is calculated using unintegrated parton distributions obtained by solving leading order CCFM equation(s) in the impact parameter space. For illustration we compare the results of the fixed-order collinear, softgluon resummation and CCFM approaches. A parameter of a nonperturbative form factor is adjusted to the D0 data. In contrast to th...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2016
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.94.034041