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Title: Beam Single-Spin Asymmetry in Semi-Inclusive Deep Inelastic Scattering

Abstract

We calculate, in a model, the beam spin asymmetry in semi-inclusive jet production in deep inelastic scattering. This twist-3, $T$-odd observable is non-zero due to final state strong interactions. With reasonable choices for the parameters, one finds an asymmetry of several percent, about the size seen experimentally. We present the result both as an explicit asymmetry calculation and as a model calculation of the new transverse-momentum dependent distribution function $$g^\perp$$.

Authors:
;
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA
Sponsoring Org.:
USDOE - Office of Energy Research (ER)
OSTI Identifier:
882549
Report Number(s):
JLAB-THY-06-495; DOE/ER/40150-3892; hep-ph/0603269
DOE Contract Number:
AC05-84ER40150
Resource Type:
Journal Article
Country of Publication:
United States
Language:
English

Citation Formats

Andrei V. Afanasev, and Carl E. Carlson. Beam Single-Spin Asymmetry in Semi-Inclusive Deep Inelastic Scattering. United States: N. p., 2006. Web.
Andrei V. Afanasev, & Carl E. Carlson. Beam Single-Spin Asymmetry in Semi-Inclusive Deep Inelastic Scattering. United States.
Andrei V. Afanasev, and Carl E. Carlson. Fri . "Beam Single-Spin Asymmetry in Semi-Inclusive Deep Inelastic Scattering". United States. doi:. https://www.osti.gov/servlets/purl/882549.
@article{osti_882549,
title = {Beam Single-Spin Asymmetry in Semi-Inclusive Deep Inelastic Scattering},
author = {Andrei V. Afanasev and Carl E. Carlson},
abstractNote = {We calculate, in a model, the beam spin asymmetry in semi-inclusive jet production in deep inelastic scattering. This twist-3, $T$-odd observable is non-zero due to final state strong interactions. With reasonable choices for the parameters, one finds an asymmetry of several percent, about the size seen experimentally. We present the result both as an explicit asymmetry calculation and as a model calculation of the new transverse-momentum dependent distribution function $g^\perp$.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Mar 31 00:00:00 EST 2006},
month = {Fri Mar 31 00:00:00 EST 2006}
}
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  • Establishing the twist-3 formalsim for the single transverse spin asymmetry, we present a complete single-spin-dependent cross section for SIDIS, ep{up_arrow} {yields} e{pi}X, associated with the twist-3 distribution for the transversely polarized nucleon. We emphasize that the consistency condition from the Ward identities for color gauge invariance is crucial to prove factorization property of the cross section.
  • We study the single transverse-spin asymmetry for open charm production in the semi-inclusive lepton-hadron deep inelastic scattering. We calculate the asymmetry in terms of the QCD collinear factorization approach for D mesons at high enough P{sub hperpendicular} and find that the asymmetry is proportional to the twist-three trigluon correlation function in the proton. With a simple model for the trigluon correlation function, we estimate the asymmetry for both COMPASS and eRHIC kinematics and discuss the possibilities of extracting the trigluon correlation function in these experiments.
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