The Spin Structure of the Nucleon in the Asymptotic Limit

Details The Spin Structure of the Nucleon in the Asymptotic Limit The Spin Structure of the Nucleon in the Asymptotic Limit

1995-10-16

arxiv.org/abs/hep-ph/9510304v1

Phys.Rev.Lett. 76 (1996) 740-743

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages in REVTEX

Scientific paper

10.1103/PhysRevLett.76.740

In analogy to the Altarelli-Parisi equation for the quark and gluon helicity contributions to the nucleon spin, we derive an evolution equation for the quark and gluon orbital angular momenta. The solution of the combined equations yields the asymptotic fractions of the nucleon spin carried by quarks and gluons: $3n_f/(16+3n_f)$ and $16/(16+3n_f)$, respectively, where $n_f$ is the number of active quark flavors. These are identical to the well-known asymptotic partitions of the nucleon momentum between quark and gluon contributions. We show that the axial-anomaly contribution to the quark helicity is cancelled by a similar contribution to the quark orbital angular momentum, making the total quark contribution to the nucleon spin anomaly-free.

Affiliated with

Also associated with

No associations

Rating

The Spin Structure of the Nucleon in the Asymptotic Limit does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The Spin Structure of the Nucleon in the Asymptotic Limit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Spin Structure of the Nucleon in the Asymptotic Limit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-498038