Longitudinal double-spin asymmetries for π0S in the forward direction for 510 GeV polarized pp collisions
The STAR Collaboration reports measurements of the longitudinal double-spin asymmetry, ALL, for neutral pions produced at forward directions in polarized proton-proton collisions, at a center-of-mass energy of 510 GeV. Results are given for transverse momenta in the range 2<pT<10 GeV/c within...
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| Main Authors: | , , |
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| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
27 August 2018
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| In: |
Physical review
Year: 2018, Volume: 98, Issue: 3 |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.98.032013 |
| Online Access: | Verlag, Volltext: https://doi.org/10.1103/PhysRevD.98.032013 Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.98.032013 
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| Author Notes: | J. Adam, I.M. Deppner, N. Herrmann [und 346 weitere] (STAR Collaboration) |
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| 520 | |a The STAR Collaboration reports measurements of the longitudinal double-spin asymmetry, ALL, for neutral pions produced at forward directions in polarized proton-proton collisions, at a center-of-mass energy of 510 GeV. Results are given for transverse momenta in the range 2<pT<10 GeV/c within two regions of pseudorapidity that span 2.65<η<3.9. These results are sensitive to the polarized gluon parton distribution function, Δg(x), down to the region of Bjorken x∼10−3. The asymmetries observed are less than ±5×10−3 in magnitude and will help constrain the contribution to the spin of the proton from polarized gluons at low x, when combined with other measurements as part of a global analysis. | ||
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