AI Article Synopsis

  • The study focuses on the scattering of polarized electrons off a polarized 3He target at various high energies, specifically from 0.862 to 5.06 GeV, measured at an angle of 15.5 degrees.
  • It includes data from different regions, such as the quasielastic peak and nucleon resonance area, to analyze differences in virtual photon cross-sections (sigma(1/2)-sigma(3/2)).
  • The research aims to calculate the extended Gerasimov-Drell-Hearn integral for neutrons across a specific range of four-momentum transfer squared (Q2) from 0.1 to 0.9 GeV².

Article Abstract

We present data on the inclusive scattering of polarized electrons from a polarized 3He target at energies from 0.862 to 5.06 GeV, obtained at a scattering angle of 15.5 degrees. Our data include measurements from the quasielastic peak, through the nucleon resonance region, and beyond, and were used to determine the virtual photon cross-section difference sigma(1/2)-sigma(3/2). We extract the extended Gerasimov-Drell-Hearn integral for the neutron in the range of four-momentum transfer squared Q2 of 0.1-0.9 GeV2.

Download full-text PDF

Source
http://dx.doi.org/10.1103/PhysRevLett.89.242301DOI Listing

Publication Analysis

Top Keywords

gerasimov-drell-hearn integral
8
integral neutron
8
3he target
8
evolution generalized
4
generalized gerasimov-drell-hearn
4
neutron 3he
4
target data
4
data inclusive
4
inclusive scattering
4
scattering polarized
4

Similar Publications

Dissecting the Hadronic Contributions to (g-2)_{μ} by Schwinger's Sum Rule.

Phys Rev Lett

February 2018

Institut für Kernphysik & Cluster of Excellence PRISMA, Johannes Gutenberg-Universität Mainz, D-55128 Mainz, Germany.

The theoretical uncertainty of (g-2)_{μ} is currently dominated by hadronic contributions. In order to express those in terms of directly measurable quantities, we consider a sum rule relating g-2 to an integral of a photoabsorption cross section. The sum rule, attributed to Schwinger, can be viewed as a combination of two older sum rules: Gerasimov-Drell-Hearn and Burkhardt-Cottingham.

View Article and Find Full Text PDF

We report new measurements of inclusive pi production from frozen-spin HD for polarized photon beams covering the Delta(1232) resonance. These provide data simultaneously on both H and D with nearly complete angular distributions of the spin-difference cross sections entering the Gerasimov-Drell-Hearn (GDH) sum rule. Recent results from Mainz and Bonn exceed the GDH prediction for the proton by 22 microb, suggesting as yet unmeasured high-energy components.

View Article and Find Full Text PDF

An explicit evaluation of the spin asymmetry of the deuteron and the associated Gerasimov-Drell-Hearn sum rule is presented which includes photodisintegration, and single and double pion and eta production as well. Photodisintegration is treated with a realistic retarded potential and a corresponding meson exchange current. For single pion and eta production the elementary operator from MAID is employed, whereas for double pion production, an effective Lagrangian approach is used.

View Article and Find Full Text PDF

For the first time we checked the fundamental Gerasimov-Drell-Hearn (GDH) sum rule for the proton experimentally in the photon energy range from 0.2-2.9 GeV with the tagged photon facilities at MAMI (Mainz) and ELSA (Bonn).

View Article and Find Full Text PDF

Q2 evolution of the generalized Gerasimov-Drell-Hearn integral for the neutron using a 3He target.

Phys Rev Lett

December 2002

Istituto Nazionale di Fiscica Nucleare, Sezione Sanità, 00161 Roma, Italy.

Article Synopsis
  • The study focuses on the scattering of polarized electrons off a polarized 3He target at various high energies, specifically from 0.862 to 5.06 GeV, measured at an angle of 15.5 degrees.
  • It includes data from different regions, such as the quasielastic peak and nucleon resonance area, to analyze differences in virtual photon cross-sections (sigma(1/2)-sigma(3/2)).
  • The research aims to calculate the extended Gerasimov-Drell-Hearn integral for neutrons across a specific range of four-momentum transfer squared (Q2) from 0.1 to 0.9 GeV².
View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!