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Measurement of the cross section and longitudinal double-spin asymmetry for dijet production in polarized pp collisions at s=200 GeV
- Adamczyk, L;
- Adkins, JK;
- Agakishiev, G;
- Aggarwal, MM;
- Ahammed, Z;
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- Yoo, I-K;
- Yu, N;
- Zbroszczyk, H;
- Zha, W;
- Zhang, S;
- Zhang, JB;
- Zhang, Y;
- Zhang, J;
- Zhang, J;
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- Zhong, C;
- Zhou, C;
- Zhou, L;
- Zhu, Z;
- Zhu, X;
- Zyzak, M
- et al.
Published Web Location
https://doi.org/10.1103/physrevd.95.071103Abstract
We report the first measurement of the longitudinal double-spin asymmetry ALL for midrapidity dijet production in polarized pp collisions at a center-of-mass energy of s=200 GeV. The dijet cross section was measured and is shown to be consistent with next-to-leading order (NLO) perturbative QCD predictions. ALL results are presented for two distinct topologies, defined by the jet pseudorapidities, and are compared to predictions from several recent NLO global analyses. The measured asymmetries, the first such correlation measurements, support those analyses that find positive gluon polarization at the level of roughly 0.2 over the region of Bjorken-x>0.05.
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