First results for the two-spin parameter ALL in π0 production by 200 GeV polarized protons and antiprotons

D. L. Adams; N. Akchurin; N. I. Belikov; J. Bystricky; P. Chaumette; M. D. Corcoran; J. D. Cossairt; J. Cranshaw; J. Deregel; A. A. Derevschikov; G. Durand; H. En'yo; J. Fabre; K. Fukuda; H. Funahashi; Y. Goto; O. A. Grachov; D. P. Grosnick; D. A. Hill; K. Imai; Y. Itow; K. Iwatani; T. Kasprzyk; K. W. Krueger; K. Kuroda; M. Laghai; F. Lehar; A. de Lesquen; D. Lopiano; F. C. Luehring; T. Maki; S. Makino; A. Masaike; Yu A. Matulenko; A. P. Meschanin; A. Michalowicz; D. H. Miller; K. Miyake; T. Nagamine; F. Nessi-Tedaldi; M. Nessi; C. Nguyen; S. B. Nurushev; Y. Ohashi; Y. Onel; D. I. Patalakha; G. Pauletta; A. Penzo; A. L. Read; J. B. Roberts; L. van Rossum; V. L. Rykov; N. Saito; G. Salvato; P. Schiavon; J. Shepard; J. Skeens; V. L. Solovyanov; H. Spinka; R. Takashima; F. Takeutchi; N. Tamura; N. Tanaka; D. G. Underwood; A. N. Vasiliev; A. Villari; J. L. White; S. Yamashita; A. Yokosawa; T. Yoshida; A. Zanetti

doi:10.1016/0370-2693(91)91350-5

First results for the two-spin parameter A_LL in π⁰ production by 200 GeV polarized protons and antiprotons

D. L. Adams, N. Akchurin, N. I. Belikov, J. Bystricky, P. Chaumette, M. D. Corcoran, J. D. Cossairt, J. Cranshaw, J. Deregel, A. A. Derevschikov, G. Durand, H. En'yo, J. Fabre, K. Fukuda, H. Funahashi, Y. Goto, O. A. Grachov, D. P. Grosnick, D. A. Hill, K. ImaiY. Itow, K. Iwatani, T. Kasprzyk, K. W. Krueger, K. Kuroda, M. Laghai, F. Lehar, A. de Lesquen, D. Lopiano, F. C. Luehring, T. Maki, S. Makino, A. Masaike, Yu A. Matulenko, A. P. Meschanin, A. Michalowicz, D. H. Miller, K. Miyake, T. Nagamine, F. Nessi-Tedaldi, M. Nessi, C. Nguyen, S. B. Nurushev, Y. Ohashi, Y. Onel, D. I. Patalakha, G. Pauletta, A. Penzo, A. L. Read, J. B. Roberts, L. van Rossum, V. L. Rykov, N. Saito, G. Salvato, P. Schiavon, J. Shepard, J. Skeens, V. L. Solovyanov, H. Spinka, R. Takashima, F. Takeutchi, N. Tamura, N. Tanaka, D. G. Underwood, A. N. Vasiliev, A. Villari, J. L. White, S. Yamashita, A. Yokosawa, T. Yoshida, A. Zanetti

Physics

Research output: Contribution to journal › Article › peer-review

40 Scopus citations

Abstract

The two-spin parameter A_LL in inclusive π⁰ productionby longitudinally-polarized protons and antiprotons on a longitudinally-polarized proton target has been measured at the 200 GeV Fermilab spin physics facility, for π⁰'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 π⁰'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.

Original language	English
Pages (from-to)	197-200
Number of pages	4
Journal	Physics Letters B
Volume	261
Issue number	1-2
DOIs	https://doi.org/10.1016/0370-2693(91)91350-5
State	Published - May 23 1991

Access to Document

10.1016/0370-2693(91)91350-5

Cite this

Adams, D. L., Akchurin, N., Belikov, N. I., Bystricky, J., Chaumette, P., Corcoran, M. D., Cossairt, J. D., Cranshaw, J., Deregel, J., Derevschikov, A. A., Durand, G., En'yo, H., Fabre, J., Fukuda, K., Funahashi, H., Goto, Y., Grachov, O. A., Grosnick, D. P., Hill, D. A., ... Zanetti, A. (1991). First results for the two-spin parameter A_LL in π⁰ production by 200 GeV polarized protons and antiprotons. Physics Letters B, 261(1-2), 197-200. https://doi.org/10.1016/0370-2693(91)91350-5

@article{c858b9ec76cd494a87d329a6510b924e,

title = "First results for the two-spin parameter ALL in π0 production by 200 GeV polarized protons and antiprotons",

abstract = "The two-spin parameter ALL in inclusive π0 productionby longitudinally-polarized protons and antiprotons on a longitudinally-polarized proton target has been measured at the 200 GeV Fermilab spin physics facility, for π0's at xF=0 with 1≤pt≤3 GeV/c. The results exclude, at the 95% confidence level, values of ALL (pp) > 0.1 and < - 0.1 for π0's produced by protons, and values of ALL (pp) > 0.1 and < -0.2 for incident antiprotons. The relevance of ALL (pp) for the gluon spin density is discussed. The data are in good agreement with {"}conventional{"}, small or zero, gluon polarization.",

author = "Adams, {D. L.} and N. Akchurin and Belikov, {N. I.} and J. Bystricky and P. Chaumette and Corcoran, {M. D.} and Cossairt, {J. D.} and J. Cranshaw and J. Deregel and Derevschikov, {A. A.} and G. Durand and H. En'yo and J. Fabre and K. Fukuda and H. Funahashi and Y. Goto and Grachov, {O. A.} and Grosnick, {D. P.} and Hill, {D. A.} and K. Imai and Y. Itow and K. Iwatani and T. Kasprzyk and Krueger, {K. W.} and K. Kuroda and M. Laghai and F. Lehar and {de Lesquen}, A. and D. Lopiano and Luehring, {F. C.} and T. Maki and S. Makino and A. Masaike and Matulenko, {Yu A.} and Meschanin, {A. P.} and A. Michalowicz and Miller, {D. H.} and K. Miyake and T. Nagamine and F. Nessi-Tedaldi and M. Nessi and C. Nguyen and Nurushev, {S. B.} and Y. Ohashi and Y. Onel and Patalakha, {D. I.} and G. Pauletta and A. Penzo and Read, {A. L.} and Roberts, {J. B.} and {van Rossum}, L. and Rykov, {V. L.} and N. Saito and G. Salvato and P. Schiavon and J. Shepard and J. Skeens and Solovyanov, {V. L.} and H. Spinka and R. Takashima and F. Takeutchi and N. Tamura and N. Tanaka and Underwood, {D. G.} and Vasiliev, {A. N.} and A. Villari and White, {J. L.} and S. Yamashita and A. Yokosawa and T. Yoshida and A. Zanetti",

note = "Funding Information: * This work was performed at the Fermi National Accelerator Laboratory, which is operated by University Research Asso-ciates, Inc., under contract DE-AC02-76CH03000 with the US Department of Energy. Work supported in part by the US Department of Energy, Di-vision of High Energy Physics, Contracts W-31-109-ENG-38, W-7405-ENG-36, DE-AC02-76ER02289, DE-ASOS-76ER05096. Present address: Indiana University, Bloomington, IN 47405, USA. Present address: Stanford Linear Accelerator Center, Stan-ford, CA 94305, USA. Present address: CERN, CH-1211 Geneva 23, Switzerland. Deceased.",

year = "1991",

month = may,

day = "23",

doi = "10.1016/0370-2693(91)91350-5",

language = "English",

volume = "261",

pages = "197--200",

journal = "Physics Letters B",

issn = "0370-2693",

number = "1-2",

}

Adams, DL, Akchurin, N, Belikov, NI, Bystricky, J, Chaumette, P, Corcoran, MD, Cossairt, JD, Cranshaw, J, Deregel, J, Derevschikov, AA, Durand, G, En'yo, H, Fabre, J, Fukuda, K, Funahashi, H, Goto, Y, Grachov, OA, Grosnick, DP, Hill, DA, Imai, K, Itow, Y, Iwatani, K, Kasprzyk, T, Krueger, KW, Kuroda, K, Laghai, M, Lehar, F, de Lesquen, A, Lopiano, D, Luehring, FC, Maki, T, Makino, S, Masaike, A, Matulenko, YA, Meschanin, AP, Michalowicz, A, Miller, DH, Miyake, K, Nagamine, T, Nessi-Tedaldi, F, Nessi, M, Nguyen, C, Nurushev, SB, Ohashi, Y, Onel, Y, Patalakha, DI, Pauletta, G, Penzo, A, Read, AL, Roberts, JB, van Rossum, L, Rykov, VL, Saito, N, Salvato, G, Schiavon, P, Shepard, J, Skeens, J, Solovyanov, VL, Spinka, H, Takashima, R, Takeutchi, F, Tamura, N, Tanaka, N, Underwood, DG, Vasiliev, AN, Villari, A, White, JL, Yamashita, S, Yokosawa, A, Yoshida, T & Zanetti, A 1991, 'First results for the two-spin parameter A_LL in π⁰ production by 200 GeV polarized protons and antiprotons', Physics Letters B, vol. 261, no. 1-2, pp. 197-200. https://doi.org/10.1016/0370-2693(91)91350-5

TY - JOUR

T1 - First results for the two-spin parameter ALL in π0 production by 200 GeV polarized protons and antiprotons

AU - Adams, D. L.

AU - Akchurin, N.

AU - Belikov, N. I.

AU - Bystricky, J.

AU - Chaumette, P.

AU - Corcoran, M. D.

AU - Cossairt, J. D.

AU - Cranshaw, J.

AU - Deregel, J.

AU - Derevschikov, A. A.

AU - Durand, G.

AU - En'yo, H.

AU - Fabre, J.

AU - Fukuda, K.

AU - Funahashi, H.

AU - Goto, Y.

AU - Grachov, O. A.

AU - Grosnick, D. P.

AU - Hill, D. A.

AU - Imai, K.

AU - Itow, Y.

AU - Iwatani, K.

AU - Kasprzyk, T.

AU - Krueger, K. W.

AU - Kuroda, K.

AU - Laghai, M.

AU - Lehar, F.

AU - de Lesquen, A.

AU - Lopiano, D.

AU - Luehring, F. C.

AU - Maki, T.

AU - Makino, S.

AU - Masaike, A.

AU - Matulenko, Yu A.

AU - Meschanin, A. P.

AU - Michalowicz, A.

AU - Miller, D. H.

AU - Miyake, K.

AU - Nagamine, T.

AU - Nessi-Tedaldi, F.

AU - Nessi, M.

AU - Nguyen, C.

AU - Nurushev, S. B.

AU - Ohashi, Y.

AU - Onel, Y.

AU - Patalakha, D. I.

AU - Pauletta, G.

AU - Penzo, A.

AU - Read, A. L.

AU - Roberts, J. B.

AU - van Rossum, L.

AU - Rykov, V. L.

AU - Saito, N.

AU - Salvato, G.

AU - Schiavon, P.

AU - Shepard, J.

AU - Skeens, J.

AU - Solovyanov, V. L.

AU - Spinka, H.

AU - Takashima, R.

AU - Takeutchi, F.

AU - Tamura, N.

AU - Tanaka, N.

AU - Underwood, D. G.

AU - Vasiliev, A. N.

AU - Villari, A.

AU - White, J. L.

AU - Yamashita, S.

AU - Yokosawa, A.

AU - Yoshida, T.

AU - Zanetti, A.

N1 - Funding Information: * This work was performed at the Fermi National Accelerator Laboratory, which is operated by University Research Asso-ciates, Inc., under contract DE-AC02-76CH03000 with the US Department of Energy. Work supported in part by the US Department of Energy, Di-vision of High Energy Physics, Contracts W-31-109-ENG-38, W-7405-ENG-36, DE-AC02-76ER02289, DE-ASOS-76ER05096. Present address: Indiana University, Bloomington, IN 47405, USA. Present address: Stanford Linear Accelerator Center, Stan-ford, CA 94305, USA. Present address: CERN, CH-1211 Geneva 23, Switzerland. Deceased.

PY - 1991/5/23

Y1 - 1991/5/23

N2 - The two-spin parameter ALL in inclusive π0 productionby longitudinally-polarized protons and antiprotons on a longitudinally-polarized proton target has been measured at the 200 GeV Fermilab spin physics facility, for π0's at xF=0 with 1≤pt≤3 GeV/c. The results exclude, at the 95% confidence level, values of ALL (pp) > 0.1 and < - 0.1 for π0's produced by protons, and values of ALL (pp) > 0.1 and < -0.2 for incident antiprotons. The relevance of ALL (pp) for the gluon spin density is discussed. The data are in good agreement with "conventional", small or zero, gluon polarization.

AB - The two-spin parameter ALL in inclusive π0 productionby longitudinally-polarized protons and antiprotons on a longitudinally-polarized proton target has been measured at the 200 GeV Fermilab spin physics facility, for π0's at xF=0 with 1≤pt≤3 GeV/c. The results exclude, at the 95% confidence level, values of ALL (pp) > 0.1 and < - 0.1 for π0's produced by protons, and values of ALL (pp) > 0.1 and < -0.2 for incident antiprotons. The relevance of ALL (pp) for the gluon spin density is discussed. The data are in good agreement with "conventional", small or zero, gluon polarization.

UR - http://www.scopus.com/inward/record.url?scp=0001208228&partnerID=8YFLogxK

U2 - 10.1016/0370-2693(91)91350-5

DO - 10.1016/0370-2693(91)91350-5

M3 - Article

AN - SCOPUS:0001208228

SN - 0370-2693

VL - 261

SP - 197

EP - 200

JO - Physics Letters B

JF - Physics Letters B

IS - 1-2

ER -

First results for the two-spin parameter A_LL in π⁰ production by 200 GeV polarized protons and antiprotons

Abstract

Access to Document

Other files and links

Fingerprint

Cite this