Measurement of the tensor structure function b(1) of the deuteron

A. Airapetian, H.P. Blok, T. Chen, W.H.A. Hesselink, A. Laziev, M.C. Simani, P.B. van der Nat, M. Vogt, J. Volmer

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

The Hermes experiment has investigated the tensor spin structure of the deuteron using the 27.6GeV/c positron beam of DESY HERA. The use of a tensor-polarized deuteron gas target with only a negligible residual vector polarization enabled the first measurement of the tensor asymmetry Azzd and the tensor structure function b1d for average values of the Bjorken variable 0.01<x<0.45 and of the negative of the squared four-momentum transfer 0.5GeV2Q2<5GeV2. The quantities Azzd and b1d are found to be nonzero. The rise of b1d for decreasing values of x can be interpreted to originate from the same mechanism that leads to nuclear shadowing in unpolarized scattering. © 2005 The American Physical Society.
Original languageEnglish
JournalPhysical Review Letters
Volume95
Issue number24
DOIs
Publication statusPublished - 2005

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Measurement of the tensor structure function b(1) of the deuteron

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