Matulenko, Yu.
Spin Dependent Structure Function
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A New measurement of the spin dependent structure function g1(x) of the deuteron

The Spin Muon collaboration Adams, D. ; Adeva, B. ; Arik, E. ; et al.
Phys.Lett.B 357 (1995) 248-254, 1995.
Inspire Record 397392 DOI 10.17182/hepdata.47847

We present a new measurement of the spin-dependent structure function g 1 d of the deuteron in deep inelastic scattering of 190 GeV polarised muons on polarised deuterons, in the kinematic range 0.003 < x < 0.7 and 1 GeV 2 < Q 2 < 60 GeV 2 . This structure function is found to be negative at small x . The first moment Γ 1 d =∫ 0 1 g 1 d d x evaluated at Q 0 2 = 10 GeV 2 is 0.034 ± 0.009 (stat.) ± 0.006 (syst.). This value is below the Ellis-Jaffe sum rule prediction by three standard deviations. Using our earlier determination of Γ 1 p , we obtain Γ 1 p − Γ 1 n = 0.199 ± 0.038 which agrees with the Bjorken sum rule.

4 data tables
Table 1

Results on the virtual photon deuteron asymmetry.

Table 2

Results on the spin structure function of the deuteron.

Table 3

Results on the spin structure function of the neutron.

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Spin asymmetry in muon - proton deep inelastic scattering on a transversely polarized target

The Spin Muon (SMC) collaboration Adams, D. ; Adeva, B. ; Arik, E. ; et al.
Phys.Lett.B 336 (1994) 125-130, 1994.
Inspire Record 375478 DOI 10.17182/hepdata.48344

We measured the spin asymmetry in the scattering of 100 GeV longitudinally-polarized muons on transversely polarized protons. The asymmetry was found to be compatible with zero in the kinematic range $0.006

2 data tables
Table 1

No description provided.

Table 2

Nucleon spin structure function g2.


Measurement of the spin dependent structure function g1(x) of the proton.

The Spin Muon (SMC) collaboration Adams, D. ; Adeva, B. ; Arik, E. ; et al.
Phys.Lett.B 329 (1994) 399-406, 1994.
Inspire Record 373036 DOI 10.17182/hepdata.48171

: We have measured the spin-dependent structure function $g_1~p$ of the proton in deep inelastic scattering of polarized muons off polarized protons, in the kinematic range $0.003

3 data tables
Table 1

Results on the virtual photon proton asymmetry.

Table 2

Results on the spin structure function of the proton.

Table 3

Data for g1 at fixed Q**2 = 10 GeV (assuming no Q**2 dependence of A1).


Measurement of the spin dependent structure function g1(x) of the deuteron.

The Spin Muon collaboration Adeva, B. ; Ahmad, S. ; Arvidson, A. ; et al.
Phys.Lett.B 302 (1993) 533-539, 1993.
Inspire Record 354911 DOI 10.17182/hepdata.28926

We report on the first measurement of the spin-dependent structure function g 1 d of the deuteron in the deep inelastic scattering of polarised muons off polarised deuterons, in the kinematical range 0.006< x <0.6, 1 GeV 2 < Q 2 <30 GeV 2 . The first moment, Γ 1 d =ʃ 0 1 g 1 d d x=0.023±0.020 ( stat. ) ± 0.015 ( syst. ) , is smaller than the prediction of the Ellis-Jaffe sum rules. Using earlier measurements of g 1 p , we infer the first moment of the spin-dependent neutron structure function g 1 n . The difference Γ 1 p − Γ 1 n =0.20±0.05 (stat.) ± 0.04 (syst.) agrees with the prediction of the Bjorken sum rule, Γ 1 p − Γ 1 n =0.191±0.002.

2 data tables
Table 1

Virtual photon asymmetry A1.

Table 2

Spin-dependent structure function G1.