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Title: Fractured Boer-Mulders effect in the production of polarized baryons

Abstract

The fractured Boer-Mulders functions, {Delta}{sup N}M{sub B{up_arrow}/(q,q){up_arrow}:p}{sup q}(x,p{sub TN};z,p-vector{sub T{center_dot}}k-vector{sub T};Q{sup 2}), describe an intriguing class of polarization effects for the production of baryons in the target fragmentation region of deep-inelastic processes. These functions characterize transverse momentum asymmetries related to the spin orientation for different flavors of axial-vector diquarks,(q{sub i},q{sub j}){up_arrow}, in an unpolarized ensemble of protons just as the familiar Boer-Mulders functions characterize transverse momentum asymmetries connected to the spin orientation of quarks in unpolarized targets. The asymmetries in p{sub TN} of the fractured Boer-Mulders effect originating in the proton distribution function can be separated kinematically, both in semi-inclusive deep-inelastic scattering and in the Drell-Yan process, from the asymmetries in k{sub TN} of the polarizing fracture functions, {Delta}{sup N}M{sub B{up_arrow}/(q,q):p}{sup q}(x,p{sub T}{sup 2};z,k{sub TN};Q{sup 2}), generated during the soft color rearrangement of the fragmentation process. The experimental requirements for this separation are presented in this article and it is shown that the fractured Boer-Mulders effect should change sign between Drell-Yan and semi-inclusive deep-inelastic scattering while the polarizing fracture functions remain the same. Simple isospin arguments indicate the two polarization mechanisms should give significantly different results for the production of polarized {Lambda}'s and {Sigma}'s.

Authors:
 [1]
  1. Portland Physics Institute, 4730 SW Macadam Avenue 101, Portland, Oregon 97239 (United States) and Spin Physics Center, University of Michigan, Ann Arbor, Michigan 48109-1040 (United States)
Publication Date:
OSTI Identifier:
21409184
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 81; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevD.81.034029; (c) 2010 The American Physical Society; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; BARYONS; DEEP INELASTIC SCATTERING; DISTRIBUTION FUNCTIONS; DRELL MODEL; FRAGMENTATION; ISOSPIN; LAMBDA BARYONS; PARTICLE PRODUCTION; POLARIZATION; PROTONS; QUARKS; SIGMA BARYONS; SPIN ORIENTATION; TRANSVERSE MOMENTUM; ELEMENTARY PARTICLES; FERMIONS; FUNCTIONS; HADRONS; HYPERONS; INELASTIC SCATTERING; INTERACTIONS; LEPTON-BARYON INTERACTIONS; LEPTON-HADRON INTERACTIONS; LEPTON-NUCLEON INTERACTIONS; LINEAR MOMENTUM; NUCLEONS; ORIENTATION; PARTICLE INTERACTIONS; PARTICLE PROPERTIES; SCATTERING; STRANGE PARTICLES

Citation Formats

Sivers, Dennis. Fractured Boer-Mulders effect in the production of polarized baryons. United States: N. p., 2010. Web. doi:10.1103/PHYSREVD.81.034029.
Sivers, Dennis. Fractured Boer-Mulders effect in the production of polarized baryons. United States. https://doi.org/10.1103/PHYSREVD.81.034029
Sivers, Dennis. 2010. "Fractured Boer-Mulders effect in the production of polarized baryons". United States. https://doi.org/10.1103/PHYSREVD.81.034029.
@article{osti_21409184,
title = {Fractured Boer-Mulders effect in the production of polarized baryons},
author = {Sivers, Dennis},
abstractNote = {The fractured Boer-Mulders functions, {Delta}{sup N}M{sub B{up_arrow}/(q,q){up_arrow}:p}{sup q}(x,p{sub TN};z,p-vector{sub T{center_dot}}k-vector{sub T};Q{sup 2}), describe an intriguing class of polarization effects for the production of baryons in the target fragmentation region of deep-inelastic processes. These functions characterize transverse momentum asymmetries related to the spin orientation for different flavors of axial-vector diquarks,(q{sub i},q{sub j}){up_arrow}, in an unpolarized ensemble of protons just as the familiar Boer-Mulders functions characterize transverse momentum asymmetries connected to the spin orientation of quarks in unpolarized targets. The asymmetries in p{sub TN} of the fractured Boer-Mulders effect originating in the proton distribution function can be separated kinematically, both in semi-inclusive deep-inelastic scattering and in the Drell-Yan process, from the asymmetries in k{sub TN} of the polarizing fracture functions, {Delta}{sup N}M{sub B{up_arrow}/(q,q):p}{sup q}(x,p{sub T}{sup 2};z,k{sub TN};Q{sup 2}), generated during the soft color rearrangement of the fragmentation process. The experimental requirements for this separation are presented in this article and it is shown that the fractured Boer-Mulders effect should change sign between Drell-Yan and semi-inclusive deep-inelastic scattering while the polarizing fracture functions remain the same. Simple isospin arguments indicate the two polarization mechanisms should give significantly different results for the production of polarized {Lambda}'s and {Sigma}'s.},
doi = {10.1103/PHYSREVD.81.034029},
url = {https://www.osti.gov/biblio/21409184}, journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 3,
volume = 81,
place = {United States},
year = {Mon Feb 01 00:00:00 EST 2010},
month = {Mon Feb 01 00:00:00 EST 2010}
}