The spin of the proton and the axial anomaly

T. Hatsuda; I. Zahed

doi:10.1016/0370-2693(89)91493-7

The spin of the proton and the axial anomaly

T. Hatsuda
, I. Zahed

Physics and Astronomy

Stony Brook University

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

We show that a consistent treatment of the abelian axial anomaly in a two-phase model of the proton yields a flavor singlet axial current that is saturated by the anomaly at Q²=0 in the chiral limit. This result suggests that at Q²=0 the matrix element of the flavor singlet axial current in a polarized proton state is small while the proton spin is still one-half. Modulo the QCD evolution equation, this result is in fair agreement with the recent EMC data.

Original language	English
Pages (from-to)	173-176
Number of pages	4
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	221
Issue number	2
DOIs	https://doi.org/10.1016/0370-2693(89)91493-7
State	Published - Apr 27 1989

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title = "The spin of the proton and the axial anomaly",

abstract = "We show that a consistent treatment of the abelian axial anomaly in a two-phase model of the proton yields a flavor singlet axial current that is saturated by the anomaly at Q2=0 in the chiral limit. This result suggests that at Q2=0 the matrix element of the flavor singlet axial current in a polarized proton state is small while the proton spin is still one-half. Modulo the QCD evolution equation, this result is in fair agreement with the recent EMC data.",

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AU - Zahed, I.

PY - 1989/4/27

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N2 - We show that a consistent treatment of the abelian axial anomaly in a two-phase model of the proton yields a flavor singlet axial current that is saturated by the anomaly at Q2=0 in the chiral limit. This result suggests that at Q2=0 the matrix element of the flavor singlet axial current in a polarized proton state is small while the proton spin is still one-half. Modulo the QCD evolution equation, this result is in fair agreement with the recent EMC data.

AB - We show that a consistent treatment of the abelian axial anomaly in a two-phase model of the proton yields a flavor singlet axial current that is saturated by the anomaly at Q2=0 in the chiral limit. This result suggests that at Q2=0 the matrix element of the flavor singlet axial current in a polarized proton state is small while the proton spin is still one-half. Modulo the QCD evolution equation, this result is in fair agreement with the recent EMC data.

UR - https://www.scopus.com/pages/publications/0001498028

U2 - 10.1016/0370-2693(89)91493-7

DO - 10.1016/0370-2693(89)91493-7

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AN - SCOPUS:0001498028

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JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 2

ER -

The spin of the proton and the axial anomaly

Abstract

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