Adams, DL; Corcoran, MD; Cranshaw, J; Nessi-Tedaldi, F; Nessia, M; Nguyen, C; ... Yoshida, T; + view all Adams, DL; Corcoran, MD; Cranshaw, J; Nessi-Tedaldi, F; Nessia, M; Nguyen, C; Roberts, JB; Skeens, J; White, JL; Akchurin, N; Onel, Y; Belikov, NI; Derevschikov, AA; Grachov, OA; Matulenko, YA; Meschanin, AP; Nurushev, SB; Patalakha, DI; Rykov, VL; Solovyanov, VL; Vasiliev, AN; Bystricky, J; Chaumette, P; Deregel, J; Durand, G; Fabre, J; Lehar, F; De Lesquen, A; Cossairt, JD; Read, AL; Van Rossum, L; En'yo, H; Funahashi, H; Goto, Y; Imai, K; Itow, Y; Makino, S; Masaike, A; Miyake, K; Nagamine, T; Saito, N; Yamashita, S; Fukuda, K; Grosnick, DP; Hill, DA; Kasprzyk, T; Laghai, M; Lopiano, D; Ohashi, Y; Shepard, J; Spinka, H; Underwood, DG; Yokosawa, A; Iwatani, K; Krueger, KW; Kuroda, K; Michalowicz, A; Luehring, FC; Miller, DH; Maki, T; Pauletta, G; Penzo, A; Schiavon, P; Zanetti, A; Salvato, G; Villari, A; Takashima, R; Takeutchi, F; Tamura, N; Tanaka, N; Yoshida, T; - view fewer (1991) First results for the two-spin parameter A in π production by 200 GeV polarized protons and antiprotons. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics , 261 (1-2) 197 - 200.
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The two-spin parameter A in inclusive π production by longitudinally-polarized protons and antiprotons on a longitudinally-polarized proton target has been measured at the 200 GeV Fermilab spin physics facility, for π's at x=0 with 1≤p≤3 GeV/c. The results exclude, at the 95% confidence level, values of A(pp)>0.1 and < - 0.1, for π's produced by protons, and values of A(p̄p) > 0.1 and < -0.2 for incident antiprotons. The relevance of A(p̄p) for the gluon spin density is discussed. The data are in good agreement with "conventional", small or zero, gluon polarization.
|Title:||First results for the two-spin parameter A in π production by 200 GeV polarized protons and antiprotons|
|UCL classification:||UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Physics and Astronomy|
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