Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-09-12
Phys.Rev. D56 (1997) 1549-1552
Physics
High Energy Physics
High Energy Physics - Phenomenology
LATEX, 11 pages, 2 figures available from the authors; Submitted to PRD
Scientific paper
10.1103/PhysRevD.56.1549
We perform the isospin decomposition of proton and neutron SLAC data for moderately low $x$ in the region $0.01 \leq x \leq 0.1$. The isovector part is well described by a power behaviour $x^{\alpha}$, where $\alpha$ does not correspond to the intercept of single $a_1$ Regge trajectory, as expected. However, the observed power leads to the validity of Bjorken sum rule and it is consistent with the power extracted from all previous data using NLO evolution. At the same time, the isoscalar part behaviour may be interpreted as a partial cancellation between a positive non-singlet contribution and a strongly negative singlet one. Further experimental consequences are mentioned.
Soffer Jacques
Teryaev Oleg V.
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