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Longitudinal double-spin asymmetry for inclusive jet and dijet production in pp collisions at s=510 GeV
- Adam, J;
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- Ullrich, T;
- Underwood, DG;
- Upsal, I;
- Van Buren, G;
- Vanek, J;
- Vasiliev, AN;
- Vassiliev, I;
- Videbæk, F;
- Vokal, S;
- Voloshin, SA;
- Wang, F;
- Wang, G;
- Wang, P;
- Wang, Y;
- Wang, Y;
- Webb, JC;
- Wen, L;
- Westfall, GD;
- Wieman, H;
- Wissink, SW;
- Witt, R;
- Wu, Y;
- Xiao, ZG;
- Xie, G;
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- Xu, H;
- Xu, N;
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- Xu, YF;
- Xu, Z;
- Yang, C;
- Yang, Q;
- Yang, S;
- Yang, Y;
- Yang, Z;
- Ye, Z;
- Ye, Z;
- Yi, L;
- Yip, K;
- Yoo, I-K;
- Zbroszczyk, H;
- Zha, W;
- Zhang, D;
- Zhang, L;
- Zhang, S;
- Zhang, S;
- Zhang, XP;
- Zhang, Y;
- Zhang, Z;
- Zhao, J;
- Zhong, C;
- Zhou, C;
- Zhu, X;
- Zhu, Z;
- Zurek, M;
- Zyzak, M
Published Web Location
https://doi.org/10.1103/physrevd.100.052005Abstract
We report the first measurement of the inclusive jet and the dijet longitudinal double-spin asymmetries, ALL, at midrapidity in polarized pp collisions at a center-of-mass energy s=510 GeV. The inclusive jet ALL measurement is sensitive to the gluon helicity distribution down to a gluon momentum fraction of x≈0.015, while the dijet measurements, separated into four jet-pair topologies, provide constraints on the x dependence of the gluon polarization. Both results are consistent with previous measurements made at s=200 GeV in the overlapping kinematic region, x>0.05, and show good agreement with predictions from recent next-to-leading order global analyses.
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