TITLE

Measurement of the isovector axial form factor at Q2 = 0.23 (GeV/c)2

AUTHOR(S)
Ríos, D. Balaguer; Baunack, S.; Glaser, B.; Maas, F.; Imai, Y.
PUB. DATE
November 2013
SOURCE
AIP Conference Proceedings;Nov2013, Vol. 1563 Issue 1, p204
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We present the preliminary value of the measurement of the parity violating asymmetry in the cross section of quasi-elastic scattering of longitudinally polarized electrons on deuteron at backward angles at Q2 = 0.23. The preliminary asymmetry is APVd(Q2 = 0.23) = (-20.77±0.84stat±1.23syst)10-6. From this value a preliminary linear combination of the GMs and the isovector axial form factor GA can be extracted GAT = 1+0.59GMs = -0.53±0.37±0.02. Combining this preliminary linear combination with that extracted from the measurement of the parity violating asymmetry on proton, already publish, it is possible to disentagle the form factors and thus we can obtain a preliminary experimental determination of the isovector axial form factor GAT = 1 = -0.43±0.46.
ACCESSION #
91945080

 

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