Measurement of single spin asymmetry for direct photon production in {ital pp} collisions at 200 GeV/c

Journal Article · Fri Sep 01 04:00:00 EDT 1995 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.48917· OSTI ID:254096

Adams, D L ^[1]; Akchurin, N ^[2]; Belikov, N I ^[3]; Bravar, A ^[4]; Bystricky, J ^[5]; Corcoran, M D ^[1]; Cossairt, J D ^[6]; Cranshaw, J ^[1]; Derevschikov, A A ^[3]; En`yo, H; Funahashi, H; Goto, Y ^[7]; Grachov, O A ^[3]; Grosnick, D P; Hill, D A ^[8]; Iijima, T; Imai, K; Itow, Y ^[7]; Iwatani, K ^[9]; Krueger, K W ^[10] ; Kuroda, K ^[11]; Laghai, M ^[8]; Lehar, F; de Lesquen, A ^[5]; Lopiano, D ^[8]; Luehring, F C ^[12]; Maki, T ^[13]; Makino, S; Masaike, A ^[7]; Matulenko, Y A; Meschanin, A P

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1. T. W. Bonner Nuclear Laboratory, Rice University, Houston, Texas 77251 (United States)
2. Department of Physics, University of Iowa, Iowa City, Iowa 52242 (United States)
3. Institute for High Energy Physics, 142284, Protvino (Russia)
4. Dipartimento di Fisica, Universita di Trieste, I-34100 Trieste (Italy)
5. CEN-Saclay, F-91191 Gif-sur-Yvette (France)
6. Fermi National Accelarator Laboratory, Batavia, Illinois 60510 (United States)
7. Department of Physics, Kyoto University, Kyoto 606 (Japan)
8. Argonne National Laboratory, Argonne, Illinois 60439 (United States)
9. Hiroshima University, Higashi-Hiroshima 724 (Japan)
10. Northeastern State University, Oklahoma 74464 (United States)
11. Laboratoire de Physique des Particules, B.P. 909, F-74017 Annecy-le-Vieux (France)
12. Physics Department, Northwestern University, Evanston, Illinois 60201 (United States)
13. University of Occupational and Environmental Health, Kita-Kyushu 807 (Japan)

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{much_gt}{ital x}{sub {ital F}}{much_gt}0.15 and 2.5{much_gt}{ital p}{sub {ital T}}{much_gt}3.1 GeV/c at Fermilab. The measurement was done using lead glass calorimeters and the photon detectors which surround the fiducial area fo the calorimeters. Background rejection has been done using the surrounding photon detectors. The single spin asymmetry, {ital A}{sub {ital N}}, for the direct photon production is consistent with zero within experimental uncertainty. {copyright} {ital 1995 American Institute of Physics.}

• OSTI ID: 254096
• Report Number(s): CONF-9409103--
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 343; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
GEV RANGE 100-1000
PARTICLE PRODUCTION
PHOTONS
POLARIZATION-ASYMMETRY RATIO
POLARIZED BEAMS
PROTON-PROTON INTERACTIONS