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Single-spin asymmetries and invariant cross sections of the high transverse-momentum inclusive pi0 production in 200 GeV/c proton-proton and antiproton-antiproton interactions (Articolo in rivista)

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Single-spin asymmetries and invariant cross sections of the high transverse-momentum inclusive pi0 production in 200 GeV/c proton-proton and antiproton-antiproton interactions (Articolo in rivista) (literal)

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D. L. Adams, N. Akchurin, N. I. Belikov, A. Bravar, J. Bystricky, M. D. Corcoran, J. D. Cossairt, J. Cranshaw, A. A. Derevschikov, H. En'yo, H. Funahashi, Y. Goto, O. A. Grachov, D. P. Grosnick, D. A. Hill, T. Iijima, K. Imai, Y. Itow, K. Iwatani, K. W. Krueger, K. Kuroda, 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, T. Shima, J. Skeens, V. L. Solovyanov, H. Spinka, R. W. Stanek, R. Takashima, F. Takeutchi, N. Tamura, N. Tanaka, D. G. Underwood, A. N. Vasiliev, J. L. White, S. Yamashita, A. Yokosawa, T. Yoshida, and A. Zanetti (1996)
Single-spin asymmetries and invariant cross sections of the high transverse-momentum inclusive pi0 production in 200 GeV/c proton-proton and antiproton-antiproton interactions
in Physical review. D. Particles and fields; The American Physical Society, College Park, MD 20740-3844 (Stati Uniti d'America)
(literal)

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D. L. Adams, N. Akchurin, N. I. Belikov, A. Bravar, J. Bystricky, M. D. Corcoran, J. D. Cossairt, J. Cranshaw, A. A. Derevschikov, H. En'yo, H. Funahashi, Y. Goto, O. A. Grachov, D. P. Grosnick, D. A. Hill, T. Iijima, K. Imai, Y. Itow, K. Iwatani, K. W. Krueger, K. Kuroda, 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, T. Shima, J. Skeens, V. L. Solovyanov, H. Spinka, R. W. Stanek, R. Takashima, F. Takeutchi, N. Tamura, N. Tanaka, D. G. Underwood, A. N. Vasiliev, J. L. White, S. Yamashita, A. Yokosawa, T. Yoshida, and A. Zanetti (literal)

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T. W. Bonner Nuclear Laboratory, Rice University, Houston, Texas 77251 Department of Physics, University of Iowa, Iowa City, Iowa 52242 Institute for High Energy Physics, 142284, Protvino, Russia CEN-Saclay, F-91191 Gif-sur-Yvette, France Fermi National Accelerator Laboratory, Batavia, Illinois 60510 Department of Physics, Kyoto University, Kyoto 606, Japan Argonne National Laboratory, Argonne, Illinois 60439 Hiroshima University, Higashi-Hiroshima 724, Japan Northeastern State University, Talequah, Oklahoma 74464 Laboratoire de Physique des Particules, B.P.909, F-74017 Annecy-le-Vieux, France Physics Department, Northwestern University, Evanston, Illinois 60201 University of Occupational and Environmental Health, Kita-Kyushu 807, Japan University of Udine, I-33100 Udine, Italy Dipartimento di Fisica, Universita di Trieste, I-34100 Trieste, Italy Dipartimento di Fisica, Universita di Messina, I-98100 Messina, Italy Kyoto University of Education, Kyoto 612, Japan Kyoto-Sangyo University, Kyoto 612, Japan Okayama University, Okayama 700, Japan Los Alamos National Laboratory, Los Alamos, New Mexico 87545 Osaka City University, Osaka 558, Japan (literal)

Titolo

Single-spin asymmetries and invariant cross sections of the high transverse-momentum inclusive pi0 production in 200 GeV/c proton-proton and antiproton-antiproton interactions (literal)

Abstract

The pi(0) inclusive and semi-inclusive, single-spin asymmetries have been measured using transversely polarized, 200-GeV/c proton and antiproton beams colliding with an unpolarized hydrogen target. The measured asymmetries are consistent with zero within the experimental uncertainties for the kinematic region -0.153 GeV/c were not correct. These data indicate that PQCD expectations seem confirmed and the higher-twist contribution to the single-spin asymmetry in pi(0) production at x(F)=0 is not large. Additional evidence for such a conclusion comes from the measurement of a semi-inclusive pi(0) asymmetry, where associated charged particles are detected opposite to the pi(0) azimuthal direction. This experiment also provides high-statistics data on the inclusive pi(0) cross sections for pp and <(p)over bar p> collisions at root s approximate to 19.4 GeV. (literal)

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