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Longitudinal double-spin asymmetry for inclusive jet and dijet production in polarized proton collisions at s=510 GeV
- Abdallah, MS;
- Aboona, BE;
- Adam, J;
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- Tribedy, P;
- Tripathy, SK;
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- Tu, Z;
- Ullrich, T;
- Underwood, DG;
- Upsal, I;
- Van Buren, G;
- Vanek, J;
- Vasiliev, AN;
- Vassiliev, I;
- Verkest, V;
- Videbæk, F;
- Vokal, S;
- Voloshin, SA;
- Wang, F;
- Wang, G;
- Wang, JS;
- Wang, P;
- Wang, X;
- Wang, Y;
- Wang, Y;
- Wang, Z;
- Webb, JC;
- Weidenkaff, PC;
- Wen, L;
- Westfall, GD;
- Wieman, H;
- Wissink, SW;
- Wu, J;
- Wu, J;
- Wu, Y;
- Xi, B;
- Xiao, ZG;
- Xie, G;
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- Yan, G;
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- Yi, L;
- Yip, K;
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- Zhang, C;
- Zhang, D;
- Zhang, J;
- Zhang, S;
- Zhang, S;
- Zhang, XP;
- Zhang, Y;
- Zhang, Y;
- Zhang, Y;
- Zhang, ZJ;
- Zhang, Z;
- Zhang, Z;
- Zhao, J;
- Zhou, C;
- Zhou, Y;
- Zhu, X;
- Zurek, M;
- Zyzak, M
Published Web Location
https://doi.org/10.1103/physrevd.105.092011Abstract
We report measurements of the longitudinal double-spin asymmetry, ALL, for inclusive jet and dijet production in polarized proton-proton collisions at midrapidity and center-of-mass energy s=510 GeV, using the high luminosity data sample collected by the STAR experiment in 2013. These measurements complement and improve the precision of previous STAR measurements at the same center-of-mass energy that probe the polarized gluon distribution function at partonic momentum fraction 0.015≲x≲0.25. The dijet asymmetries are separated into four jet-pair topologies, which provide further constraints on the x dependence of the polarized gluon distribution function. These measurements are in agreement with previous STAR measurements and with predictions from current next-to-leading-order global analyses. They provide more precise data at low dijet invariant mass that will better constrain the shape of the polarized gluon distribution function of the proton.
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