منابع مشابه
Orbital Angular Momentum in Chiral Quark Model
We developed a new and unified scheme for describing both quark spin and orbital angular momenta in symmetry-breaking chiral quark model. The loss of quark spin in the chiral splitting processes is compensated by the gain of the orbital angular momentum carried by quarks and antiquarks. The sum of both spin and orbital angular momenta carried by quarks and antiquarks is 1/2. The analytic and nu...
متن کاملQuark Orbital Angular Momentum in the Baryon
Analytical and numerical results, for the orbital and spin content carried by different quark flavors in the baryons, are given in the chiral quark model with symmetry breaking. The reduction of the quark spin, due to the spin dilution in the chiral splitting processes, is transferred into the orbital motion of quarks and antiquarks. The orbital angular momentum for each quark flavor in the pro...
متن کاملQuark Orbital Angular Momentum from Lattice QCD
employs the Z2 noise with an unbiased subtraction. This reduced the error by a factor of 4 with negligible overhead. The total quark contribution to the proton spin is found to be 0.30±0.07. From this and the quark spin content we deduce the quark orbital angular momentum to be 0.17 ± 0.06 which is ∼ 34% of the proton spin. We further predict that the gluon angular momentum to be 0.20 ± 0.07, i...
متن کاملQuark Orbital Angular Momentum in the Wandzura–Wilczek Approximation
We show that quark orbital angular momentum is directly related to offforward correlation functions which include intrinsic transverse momentum corresponding to a derivative with respect to the transverse coordinates. Its possible contribution to scattering processes is therefore of higher twist and vanishes in the forward limit. The relation of OAM to other twist 2 and 3 distributions known in...
متن کاملAnomalous Magnetic Moments and Quark Orbital Angular Momentum
Detailed measurements of the spin structure of the nucleon [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11] have revealed that only a small fraction of the nucleon spin is carried by the quark spin. This result immediately raised the question, which degrees of freedom carry the rest. Unfortunately, both orbital angular momentum and the gluon spin are difficult to access experimentally, and therefore little ...
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ژورنال
عنوان ژورنال: Few-Body Systems
سال: 2016
ISSN: 0177-7963,1432-5411
DOI: 10.1007/s00601-016-1064-6