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Longitudinal double-spin asymmetries for π0 s in the forward direction for 510 GeV polarized pp collisions LONGITUDINAL DOUBLE-SPIN ASYMMETRIES for ... J. ADAM et al

Adam, J.
•
Adamczyk, L.
•
Adams, J. R.
altro
Zyzak, M.
2018
  • journal article

Periodico
PHYSICAL REVIEW D
Abstract
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.
DOI
10.1103/PhysRevD.98.032013
WOS
WOS:000442809800001
Archivio
http://hdl.handle.net/11368/2940523
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85052992572
http://harvest.aps.org/v2/bagit/articles/10.1103/PhysRevD.98.032013/apsxml
Diritti
open access
license:creative commons
license uri:http://creativecommons.org/licenses/by-nc-nd/4.0/
FVG url
https://arts.units.it/bitstream/11368/2940523/2/PhysRevD.98.032013.pdf
Soggetti
  • STAR

  • parton

  • spin

  • heavy ion

  • RHIC

Scopus© citazioni
12
Data di acquisizione
Jun 14, 2022
Vedi dettagli
Web of Science© citazioni
12
Data di acquisizione
Mar 24, 2024
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