DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Beam normal spin asymmetry for the epeΔ(1232) process

Abstract

Here, we calculate the single spin asymmetry for the $$e p \to e \Delta(1232)$$ process, for an electron beam polarized normal to the scattering plane. Such single spin asymmetries vanish in the one-photon exchange approximation, and are directly proportional to the absorptive part of a two-photon exchange amplitude. As the intermediate state in such two-photon exchange process is on its mass shell, the asymmetry allows one to access for the first time the on-shell $$\Delta \to \Delta$$ as well as $$N^\ast \to \Delta$$ electromagnetic transitions. We present the general formalism to describe the $$e p \to e \Delta$$ beam normal spin asymmetry, and provide a numerical estimate of its value using the nucleon, $$\Delta(1232)$$, $$S_{11}(1535)$$, and $$D_{13}(1520)$$ intermediate states. We compare our results with the first data from the Qweak@JLab experiment and give predictions for the A4@MAMI experiment.

Authors:
 [1];  [2];  [3];  [4]
  1. College of William and Mary, Williamsburg, VA (United States)
  2. Univ. degli Studie di Pavia, Pavia (Italy); INFN Sezione di Pavia, Pavia (Italy)
  3. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  4. Johannes Gutenberg Univ., Mainz (Germany)
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1416140
Alternate Identifier(s):
OSTI ID: 1414850
Report Number(s):
JLAB-THY-17-2630; DOE/OR/23177-4301; arXiv:1708.05316
Journal ID: ISSN 2470-0010; PRVDAQ; TRN: US1800882
Grant/Contract Number:  
PHY-1516509; AC05-06OR23177; FG02-87ER40365
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 96; Journal Issue: 11; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Carlson, Carl E., Pasquini, Barbara, Pauk, Vladyslav, and Vanderhaeghen, Marc. Beam normal spin asymmetry for the ep→eΔ(1232) process. United States: N. p., 2017. Web. doi:10.1103/PhysRevD.96.113010.
Carlson, Carl E., Pasquini, Barbara, Pauk, Vladyslav, & Vanderhaeghen, Marc. Beam normal spin asymmetry for the ep→eΔ(1232) process. United States. https://doi.org/10.1103/PhysRevD.96.113010
Carlson, Carl E., Pasquini, Barbara, Pauk, Vladyslav, and Vanderhaeghen, Marc. Tue . "Beam normal spin asymmetry for the ep→eΔ(1232) process". United States. https://doi.org/10.1103/PhysRevD.96.113010. https://www.osti.gov/servlets/purl/1416140.
@article{osti_1416140,
title = {Beam normal spin asymmetry for the ep→eΔ(1232) process},
author = {Carlson, Carl E. and Pasquini, Barbara and Pauk, Vladyslav and Vanderhaeghen, Marc},
abstractNote = {Here, we calculate the single spin asymmetry for the $e p \to e \Delta(1232)$ process, for an electron beam polarized normal to the scattering plane. Such single spin asymmetries vanish in the one-photon exchange approximation, and are directly proportional to the absorptive part of a two-photon exchange amplitude. As the intermediate state in such two-photon exchange process is on its mass shell, the asymmetry allows one to access for the first time the on-shell $\Delta \to \Delta$ as well as $N^\ast \to \Delta$ electromagnetic transitions. We present the general formalism to describe the $e p \to e \Delta$ beam normal spin asymmetry, and provide a numerical estimate of its value using the nucleon, $\Delta(1232)$, $S_{11}(1535)$, and $D_{13}(1520)$ intermediate states. We compare our results with the first data from the Qweak@JLab experiment and give predictions for the A4@MAMI experiment.},
doi = {10.1103/PhysRevD.96.113010},
journal = {Physical Review D},
number = 11,
volume = 96,
place = {United States},
year = {Tue Dec 26 00:00:00 EST 2017},
month = {Tue Dec 26 00:00:00 EST 2017}
}

Journal Article:

Citation Metrics:
Cited by: 14 works
Citation information provided by
Web of Science

Figures / Tables:

Figure-1 Figure-1: The one-photon exchange diagram. The grey blob represents the electromagnetic vertex of the nucleon.

Save / Share:

Works referenced in this record:

Unitary isobar model --MAID2007
journal, October 2007


Electromagnetic form factors of spin-⅓ baryons
journal, November 1990


Review of Particle Physics
journal, October 2016


Electron beam single-spin asymmetries in the resonance region with final hadrons observed
journal, April 2016


Quark transverse charge densities in the from lattice QCD
journal, June 2009


Magnetic dipole moment of the Δ + ( 1232 ) from the γ p γ π 0 p reaction
journal, November 2001


Virtual Compton scattering off the nucleon
journal, January 1998


Field theory of nucleon to higher-spin baryon transitions
journal, September 1999


Inelastic photon scattering and the magnetic moment of the Δ (1232) resonance
journal, July 2000


Beam normal spin asymmetry in elastic lepton–nucleon scattering
journal, September 2004


Multipole γN-Δ form factors and resonant photo- and electroproduction
journal, November 1973


Magnetic Moment of the Δ ( 1232 ) Resonance in Chiral Effective-Field Theory
journal, March 2005


New Measurements of the Beam Normal Spin Asymmetries at Large Backward Angles with Hydrogen and Deuterium Targets
journal, July 2017


Elastic scattering of electrons from polarized protons and inelastic electron scattering experiments
journal, December 1971


Lattice calculation of the magnetic moments of Δ and Ω baryons with dynamical clover fermions
journal, March 2009


Quantization of an interacting spin- 3 2 field and the Δ isobar
journal, September 1998


Radiative π0 photoproduction on protons in the Δ+ (1232) region
journal, February 2010


Baryon charge radii and quadrupole moments in the 1 / N c expansion: The 3-flavor case
journal, January 2003


Low-Energy Measurements of the Weak Mixing Angle
journal, October 2013


Chiral symmetry and the axial nucleon to Δ ( 1232 ) transition form factors
journal, November 2008


Two-Photon Physics in Hadronic Processes
journal, November 2007


Chiral symmetry and the delta-nucleon transition form factors
journal, August 1999


Nucleon and Δ ( 1232 ) form factors at low momentum transfer and small pion masses
journal, February 2012


Electromagnetic excitation of nucleon resonances
journal, September 2011

  • Tiator, L.; Drechsel, D.; Kamalov, S. S.
  • The European Physical Journal Special Topics, Vol. 198, Issue 1
  • DOI: 10.1140/epjst/e2011-01488-9

Transverse Beam Spin Asymmetries in Forward-Angle Elastic Electron-Proton Scattering
journal, August 2007


Δ -baryon electromagnetic form factors in lattice QCD
journal, January 2009


Baryon magnetic moments in the expansion
journal, September 1994


New Measurements of the Transverse Beam Asymmetry for Elastic Electron Scattering from Selected Nuclei
journal, November 2012


Transverse Beam Spin Asymmetries at Backward Angles in Elastic Electron-Proton and Quasielastic Electron-Deuteron Scattering
journal, July 2011


Decays of ℓ=1 baryons to Δγ
journal, November 1998


Chiral effective-field theory in the Δ ( 1232 ) region. II. Radiative pion photoproduction
journal, January 2008


Complete analysis of baryon magnetic moments in the 1 / N c expansion
journal, July 2004


The Reaction γ p π 0 γ p and the Magnetic Dipole Moment of the Δ + ( 1232 ) Resonance
journal, December 2002


Isobar configurations in nuclei
journal, February 1978


Studies of Nucleon Resonance Structure in Exclusive Meson Electroproduction
journal, June 2013

  • Aznauryan, I. G.; Bashir, A.; Braun, V. M.
  • International Journal of Modern Physics E, Vol. 22, Issue 06
  • DOI: 10.1142/S0218301313300154

Colloquium : The Shape of Hadrons
journal, September 2012

  • Alexandrou, Constantia; Papanicolas, Costas N.; Vanderhaeghen, Marc
  • Reviews of Modern Physics, Vol. 84, Issue 3
  • DOI: 10.1103/RevModPhys.84.1231

Preliminary beam normal single spin asymmetry results from Qweak
conference, January 2013

  • Waidyawansa, Buddhini P.
  • 11TH CONFERENCE ON THE INTERSECTIONS OF PARTICLE AND NUCLEAR PHYSICS: (CIPANP 2012), AIP Conference Proceedings
  • DOI: 10.1063/1.4826847

New physics and the proton radius problem
journal, August 2012


Electromagnetic excitation of the Δ(1232)-resonance
journal, January 2007


Signatures of chiral dynamics in the nucleon to Delta transition⋆
journal, April 2006


Measurement of the Target-Normal Single-Spin Asymmetry in Quasielastic Scattering from the Reaction He 3 ( e , e )
journal, October 2015


Contributions from γ Z box diagrams to parity violating elastic e p scattering
journal, June 2011


Unitary model for the γ p γ π 0 p reaction and the magnetic dipole moment of the Δ + ( 1232 )
journal, January 2005


Resonance estimates for single spin asymmetries in elastic electron-nucleon scattering
journal, October 2004


Large N c , constituent quarks, and N , Δ charge radii
journal, October 2000


Works referencing / citing this record:

Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.