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Longitudinal double-spin asymmetry for inclusive jet production in p+p collisions at s**(1/2) = 200-GeV

The collaboration
Phys.Rev.Lett. 100 (2008) 232003, 2008.

Abstract (data abstract)
We report a new STAR measurement of the longitudinal double-spin asymmetry $A_{LL}$ for inclusive jet production at mid-rapidity in polarized p+p collisions at a center-of-mass energy of $\sqrt{s}$ = 200 GeV. The data, which cover jet transverse momenta $5 < p_{T} < 30$ GeV/c, are substantially more precise than previous measurements. They provide significant new constraints on the gluon spin contribution to the nucleon spin through the comparison to predictions derived from one global fit of polarized deep-inelastic scattering measurements.

• #### Figure 2 a

Data from Figure 2 a

10.17182/hepdata.98970.v1/t1

(a) The raw detected jet yield in data (points) compared with the STAR Monte Carlo simulations. (b) Correlation between the...

• #### Figure 2 b

Data from Figure 2 b

10.17182/hepdata.98970.v1/t2

(a) The raw detected jet yield in data (points) compared with the STAR Monte Carlo simulations. (b) Correlation between the...

• #### Figure 3

Data from Figure 3

10.17182/hepdata.98970.v1/t3

Longitudinal double-spin asymmetry $A_{LL}$ for inclusive jet production at $\sqrt{s_{NN}}$ = 200 GeV versus jet $p_{T}$. The points show results...

• #### Figure 4 a

Data from Figure 4 a

10.17182/hepdata.98970.v1/t4

(a) The solid curve represents the fraction of $\Delta G$ for GRSV-std that has $x > x_{min}$ for scale $Q^{2}$...

• #### Figure 4 b

Data from Figure 4 b

10.17182/hepdata.98970.v1/t5

(a) The solid curve represents the fraction of $\Delta G$ for GRSV-std that has $x > x_{min}$ for scale $Q^{2}$...