Adams, DL;
Akchurin, N;
Belikov, NI;
Bystricky, J;
Chaumette, P;
Corcoran, MD;
Cossairt, JD;
... Zanetti, A; + view all
(1991)
First results for the two-spin parameter A<inf>LL</inf> in π<sup>0</sup> production by 200 GeV polarized protons and antiprotons.
Physics Letters B
, 261
(1-2)
pp. 197-200.
10.1016/0370-2693(91)91350-5.
Abstract
The two-spin parameter A LL in inclusive π 0 productionby longitudinally-polarized protons and antiprotons on a longitudinally-polarized proton target has been measured at the 200 GeV Fermilab spin physics facility, for π 0 's at x F =0 with 1≤p t ≤3 GeV/c. The results exclude, at the 95% confidence level, values of A LL (pp) > 0.1 and < - 0.1 for π 0 's produced by protons, and values of A LL (pp) > 0.1 and < -0.2 for incident antiprotons. The relevance of A LL (pp) for the gluon spin density is discussed. The data are in good agreement with "conventional", small or zero, gluon polarization. © 1991.
| Type: | Article |
|---|---|
| Title: | First results for the two-spin parameter A<inf>LL</inf> in π<sup>0</sup> production by 200 GeV polarized protons and antiprotons |
| DOI: | 10.1016/0370-2693(91)91350-5 |
| UCL classification: | UCL > School of BEAMS UCL > School of BEAMS > Faculty of Maths and Physical Sciences |
| URI: | http://discovery.ucl.ac.uk/id/eprint/1338207 |
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