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Measurement of the doubly-polarized He3→(γ→,n)pp reaction at 16.5 MeV and its implications for the GDH sum rule

Publication ,  Journal Article
Laskaris, G; Yan, X; Mueller, JM; Zimmerman, WR; Xiong, W; Ahmed, MW; Averett, T; Chu, PH; Deltuva, A; Flower, C; Fonseca, AC; Gao, H; Wu, YK ...
Published in: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
November 12, 2015

We report new measurements of the double-polarized photodisintegration of 3He at an incident photon energy of 16.5 MeV, carried out at the High Intensity γ-ray Source (HIγS) facility located at Triangle Universities Nuclear Laboratory (TUNL). The spin-dependent double-differential cross sections and the contribution from the three-body channel to the Gerasimov-Drell-Hearn (GDH) integrand were extracted and compared with the state-of-the-art three-body calculations. The calculations, which include the Coulomb interaction and are in good agreement with the results of previous measurements at 12.8 and 14.7 MeV, deviate from the new cross section results at 16.5 MeV. The GDH integrand was found to be about one standard deviation larger than the maximum value predicted by the theories.

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Published In

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

DOI

ISSN

0370-2693

Publication Date

November 12, 2015

Volume

750

Start / End Page

547 / 551

Related Subject Headings

  • Nuclear & Particles Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences
  • 0105 Mathematical Physics
 

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Laskaris, G., Yan, X., Mueller, J. M., Zimmerman, W. R., Xiong, W., Ahmed, M. W., … Wu, Y. K. (2015). Measurement of the doubly-polarized He3→(γ→,n)pp reaction at 16.5 MeV and its implications for the GDH sum rule. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 750, 547–551. https://doi.org/10.1016/j.physletb.2015.09.065
Laskaris, G., X. Yan, J. M. Mueller, W. R. Zimmerman, W. Xiong, M. W. Ahmed, T. Averett, et al. “Measurement of the doubly-polarized He3→(γ→,n)pp reaction at 16.5 MeV and its implications for the GDH sum rule.” Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 750 (November 12, 2015): 547–51. https://doi.org/10.1016/j.physletb.2015.09.065.
Laskaris G, Yan X, Mueller JM, Zimmerman WR, Xiong W, Ahmed MW, et al. Measurement of the doubly-polarized He3→(γ→,n)pp reaction at 16.5 MeV and its implications for the GDH sum rule. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2015 Nov 12;750:547–51.
Laskaris, G., et al. “Measurement of the doubly-polarized He3→(γ→,n)pp reaction at 16.5 MeV and its implications for the GDH sum rule.” Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 750, Nov. 2015, pp. 547–51. Scopus, doi:10.1016/j.physletb.2015.09.065.
Laskaris G, Yan X, Mueller JM, Zimmerman WR, Xiong W, Ahmed MW, Averett T, Chu PH, Deltuva A, Flower C, Fonseca AC, Gao H, Golak J, Heideman JN, Karwowski HJ, Meziane M, Sauer PU, Skibiński R, Strakovsky II, Weller HR, Witała H, Wu YK. Measurement of the doubly-polarized He3→(γ→,n)pp reaction at 16.5 MeV and its implications for the GDH sum rule. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2015 Nov 12;750:547–551.
Journal cover image

Published In

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

DOI

ISSN

0370-2693

Publication Date

November 12, 2015

Volume

750

Start / End Page

547 / 551

Related Subject Headings

  • Nuclear & Particles Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences
  • 0105 Mathematical Physics