Measurement of the Q^{2} Dependence of the Deuteron Spin Structure Function g_{1} and its Moments at Low Q^{2} with CLAS

Physical Review Letters
K P AdhikariCLAS Collaboration

Abstract

We measured the g_{1} spin structure function of the deuteron at low Q^{2}, where QCD can be approximated with chiral perturbation theory (χPT). The data cover the resonance region, up to an invariant mass of W≈1.9  GeV. The generalized Gerasimov-Drell-Hearn sum, the moment Γ_{1}^{d} and the spin polarizability γ_{0}^{d} are precisely determined down to a minimum Q^{2} of 0.02  GeV^{2} for the first time, about 2.5 times lower than that of previous data. We compare them to several χPT calculations and models. These results are the first in a program of benchmark measurements of polarization observables in the χPT domain.

References

Oct 1, 1993·Physical Review. D·V BernardU G Meissner
Dec 18, 2002·Physical Review Letters·M AmarianUNKNOWN Jefferson Lab E94010
Nov 13, 2003·Physical Review Letters·H DutzUNKNOWN GDH Collaboration
Dec 20, 2003·Physical Review Letters·R FatemiUNKNOWN CLAS Collaboration
Feb 3, 2004·Physical Review Letters·M AmarianP Zolnierczuk
Aug 25, 2004·Physical Review Letters·H DutzUNKNOWN GDH Collaboration
Nov 5, 2004·Physical Review Letters·M AmarianUNKNOWN Jefferson Lab E94010 Collaboration
May 21, 2005·Physical Review Letters·H DutzUNKNOWN GDH Collaboration
Dec 13, 2006·Physical Review Letters·J AhrensUNKNOWN GDH and A2 Collaborations
Sep 4, 2008·Physical Review Letters·K SliferUNKNOWN Jefferson Lab E94010 Collaboration
Jun 13, 2009·Physical Review Letters·S HoblitUNKNOWN LEGS-Spin Collaboration

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Citations

Mar 1, 2019·Reports on Progress in Physics·Alexandre DeurGuy F de Téramond

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