Search

Your search keyword '"POLARIZED-PROTON-BEAM"' showing total 2 results
Start Over Descriptor "POLARIZED-PROTON-BEAM"
2 results on '"POLARIZED-PROTON-BEAM"'

1. 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

Author

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

Subjects
COULOMB-NUCLEAR INTERFERENCE, POLARIZED-PROTON-BEAM, ANALYZING POWER, PI-0 PRODUCTION, HARD-SCATTERING, ETA-PRODUCTION, 40 GEV/C, COLLISIONS, ANTIPROTONS, DEPENDENCE, High Energy Physics::Experiment, Nuclear Experiment
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 collisions at root s approximate to 19.4 GeV.

Published
1996
Full Text
View/download PDF

2. Measurement of single spin asymmetry for direct photon production in pp collisions at 200 GeV/c

Author

Jay Roberts, D. G. Underwood, P. Schiavon, S. Makino, A. P. Meschanin, M. Nessi, H. Funahashi, K. Imai, S. B. Nurushev, D. Lopiano, K. Kuroda, D. I. Patalakha, Fujio Takeutchi, S. Yamashita, D. Grosnick, H. En'yo, J. Cranshaw, G. Salvato, F. Nessi-Tedaldi, J. L. White, Yu A. Matulenko, F. Luehring, M. D. Corcoran, Ryuichi Takashima, D. Hill, O. A. Grachov, N. Tamura, A. Michalowicz, N. I. Belikov, Norio Saito, N. Tanaka, Y. Ohashi, A. Bravar, T. Mäki, J. D. Cossairt, Aldo Penzo, C. Nguyen, Yasar Onel, Kozo Miyake, Y. Goto, VL Rykov, Akira Masaike, J. Bystricky, J. Skeens, Andrey Vasiliev, David H. Adams, N. Achurin, T. Iijima, T. Nagamine, Anna Zanetti, F. Lehar, A. Yokosawa, Kazuo Iwatani, K. Krueger, Antonio Villari, Yoshitaka Itow, A. de Lesquen, L. Van Rossum, Tatsushi Shima, H. M. Spinka, T. Yoshida, V. L. Solovyanov, A. A. Derevschikov, G. Pauletta, David Miller, and A. L. Read

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Photon, Proton, Scattering, Physics::Instrumentation and Detectors, media_common.quotation_subject, Asymmetry, Nuclear physics, Lead glass, Experimental uncertainty analysis, Antiproton, visual_art, visual_art.visual_art_medium, High Energy Physics::Experiment, Fermilab, POLARIZED-PROTON-BEAM, ANALYZING POWER, PI-0 PRODUCTION, ANTIPROTONS, SCATTERING, PI(0), Beam (structure), media_common, Spin-½
Abstract

The single spin asymmetry for inclusive direct-photon production has been measured using a polarized proton beam of 200 GeV/c with an unpolarized proton target at -0.15 < x(F) < 0.15 and 2.5 < p(T) < 3.1 GeV/(c) at Fermilab. The data on the cross section for pp --> gamma X at 2.5 < p(T) < 3.8 GeV/c are also provided. The measurement was done using lead-glass calorimeters and photon detectors which surrounded the fiducial area of the calorimeters. Background rejection has been done using these surrounding photon detectors. The cross section obtained is consistent with the results of previous measurements assuming a nuclear dependence of A(1.0). The single spin asymmetry, A(N), for the direct-photon production is consistent with zero within experimental uncertainty.

Published
1995
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results