Longitudinal Double-Spin Asymmetries for Dijet Production at Intermediate 
Pseudorapidity in Polarized pp Collisions at sqrt{s} = 200 GeV

Colloaboration, STAR; Adam, J.; Schmitz, N.; Seyboth, P.; et al.,

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Longitudinal Double-Spin Asymmetries for Dijet Production at Intermediate Pseudorapidity in Polarized pp Collisions at sqrt{s} = 200 GeV

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Colloaboration, STAR
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Adam, J.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Schmitz, N.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Seyboth, P.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

et al.,
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

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Citation

Colloaboration, S., Adam, J., Schmitz, N., Seyboth, P., & et al. (2018). Longitudinal Double-Spin Asymmetries for Dijet Production at Intermediate Pseudorapidity in Polarized pp Collisions at sqrt{s} = 200 GeV. Physical Review D, (98), 032011. Retrieved from https://publications.mppmu.mpg.de/?action=search&mpi=MPP-2018-324.

Cite as: https://hdl.handle.net/21.11116/0000-0003-F8E7-1

Abstract

We present the first measurements of the longitudinal double-spin asymmetry $A_{LL}$ for dijets with at least one jet reconstructed within the pseudorapidity range $0.8 < η< 1.8$. The dijets were measured in polarized $pp$ collisions at a center-of-mass energy $\sqrt{s}$ = 200 GeV. Values for $A_{LL}$ are determined for several distinct event topologies, defined by the jet pseudorapidities, and span a range of parton momentum fraction $x$ down to $x \sim$ 0.01. The measured asymmetries are found to be consistent with the predictions of global analyses that incorporate the results of previous RHIC measurements. They will provide new constraints on $Δg(x)$ in this poorly constrained region when included in future global analyses.