EFFECTIVE LAGRANGIAN FOR THE TWO-COMPONENT APPROACH TO THE "PROTON SPIN" PUZZLE

We display an effective chiral Lagrangian which illuminates the mechanism found by Shore and Veneziano for decomposing the proton matrix element of the axial singlet current into quark and gluonic pieces. The entire matrix element is shown to be proportional to the amplitude for SU(3) singlet exchange in baryon-baryon scattering at zero momentum transfer. An effect of SU(3) symmetry breaking relevant for analysis of the EMC experiment is discussed. In addition, an exact solution is presented for the pseudoscalar quark densities which enter into an alternative method of derivation.

Download Full-text

Two-component approach to the ‘‘proton spin’’ puzzle in generalized Skyrme models

Physical Review Letters ◽

10.1103/physrevlett.65.2955 ◽

1990 ◽

Vol 65 (24) ◽

pp. 2955-2958 ◽

Cited By ~ 15

Author(s):

J. Schechter ◽

V. Soni ◽

A. Subbaraman ◽

H. Weigel

Keyword(s):

Proton Spin ◽

Two Component ◽

Component Approach

Download Full-text

THE EFFECTIVE LAGRANGIAN APPROACH TO THE "PROTON-SPIN PUZZLE" AND THE ISSUE OF "TWO COMPONENTS"

Modern Physics Letters A ◽

10.1142/s0217732392003360 ◽

1992 ◽

Vol 07 (01) ◽

pp. 1-11 ◽

Cited By ~ 10

Author(s):

J. SCHECHTER ◽

V. SONI ◽

A. SUBBARAMAN ◽

H. WEIGEL

Keyword(s):

Matrix Element ◽

Short Distance ◽

Skyrme Model ◽

Proton Spin ◽

Point Of View ◽

Lagrangian Approach ◽

Lagrangian Point ◽

Distance Information ◽

Effective Lagrangian

The "proton-spin puzzle" is examined from the effective Lagrangian point of view. A generalized (to include "short distance" information) Skyrme model is shown to give a satisfactory picture. We then examine the question of the breakup of the axial singlet matrix element into "matter" and "glue" pieces in this framework.

Download Full-text

Study of Centrality and Beam Energy Dependence of $$dN_{ch}/d\eta $$ and $$dE_T/d\eta $$ at Midrapidity Using Two Component Approach

XXII DAE High Energy Physics Symposium - Springer Proceedings in Physics ◽

10.1007/978-3-319-73171-1_60 ◽

2018 ◽

pp. 267-270

Author(s):

Ashutosh Kumar Pandey ◽

Ranjit Nayak ◽

Basanta. K. Nandi ◽

Sadhana Dash ◽

Priyanka Sett

Keyword(s):

Energy Dependence ◽

Beam Energy ◽

Two Component ◽

Component Approach

Download Full-text

Tense and aspect morphology in the Zhuokeji rGyalrong ver

Cahiers de linguistique - Asie orientale ◽

10.1163/19606028_032_02-04 ◽

2003 ◽

Vol 32 (2) ◽

pp. 245-286

Author(s):

You-Jing Lin

Keyword(s):

Theoretical Work ◽

Tense And Aspect ◽

Past Time ◽

Recent Theoretical Work ◽

Verb Forms ◽

Two Component ◽

Component Approach ◽

Phonological Treatment

This paper analyzes primary tense and aspect distinctions in the Zhuokeji rGyalrong verb. The proposed analysis improves upon existing work on the same dialect partly due to its fine-tuned phonological treatment of the relevant verb forms, and partly due to its integration of methodological insights from recent theoretical work on tense and aspect, in particular Östen Dahl's framework as well as Carlota Smith's two-component approach to situational and viewpoint aspects. Zhuokeji is demonstrated to encode a typologically prominent aspectual opposition between Perfective and Imperfective as well as a distinction of absolute tense between Present Imperfective and Past Imperfective, with the Perfective usually carrying past-time reference.

Download Full-text