Measurement of the analyzing power in the Primakoff process with a high-energy polarized proton beam

Journal Article · Mon Jan 22 00:00:00 EST 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.64.357· OSTI ID:6996327

Carey, D C; Coleman, R N; Corcoran, M D; Cossairt, J D; Derevschikov, A A; Grosnick, D P; Hill, D; Imai, K; Konaka, A; Kuroda, K; Lehar, F; de Lesquen, A; Lopiano, D; Luehring, F C; Maki, T; Makino, S; Masaike, A; Matulenko, Y A; Meschanin, A P; Michalowicz, A ; Miller, D H; Miyake, K; Nagamine, T; Nakano, T; Nessi-Tedaldi, F; Nessi, M; Nguyen, C; Nurushev, S B; Ohashi, Y; Pauletta, G; Penzo, A; Phillips, G C; Read, A L; Roberts, J B; van Rossum, L; Salvato, G; Schiavon, P; Shima, T; Solovyanov, V L; Spinka, H; Stanek, R W; Takashima, R; Takeutchi, F; Tamura, N; Tanaka, N; Underwood, D G; Vasiliev, A N; Villari, A; White, J L; Yokosawa, A; Yoshida, T; Zanetti, A ^[1]

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1. Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (US) T. W. Bonner Nuclear Laboratory, Rice University, Houston, Texas 77251 Institute for High Energy Physics, Serpukhov, U.S.S.R. Argonne National Laboratory, Argonne, Illinois 60439 Department of Physics, Ky

The analyzing power (spin-dependent azimuthal asymmetry) has been observed for the first time in the nuclear Coulomb coherent production process, the Primakoff process,'' with the use of the newly constructed 185-GeV/{ital c} Fermilab polarized proton beam. We have observed a large asymmetry of this process in the regions of {vert bar}{ital t}{prime}{vert bar}{lt}0.001 (GeV/{ital c}){sup 2} and 1.36{lt}{ital M}({pi}{sup 0}p){lt}1.52 GeV/{ital c}{sup 2}, where the Coulomb process is predominant. The measured asymmetry is consistent with the analyzing power of the existing low-energy {gamma}+{ital p}{r arrow}{pi}{sup 0}+p data.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38; AC02-76CH03000; AC02-76ER02289; W-7405-ENG-36; AS05-76ER05096
• OSTI ID: 6996327
• Journal Information: Physical Review Letters; (USA), Vol. 64:4; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
PROTON BEAMS
ANALYZING POWER
PROTON-PROTON INTERACTIONS
PRIMAKOFF EFFECT
DATA ANALYSIS
DELTA-1232 BARYONS
DIFFERENTIAL CROSS SECTIONS
EXPERIMENTAL DATA
FERMILAB ACCELERATOR
GEV RANGE 100-1000
MASS
MASS SPECTRA
N-1520 BARYONS
PIONS NEUTRAL
POLARIZED BEAMS
PROTONS
ACCELERATORS
BARYON-BARYON INTERACTIONS
BARYONS
BASIC INTERACTIONS
BEAMS
BOSONS
CROSS SECTIONS
CYCLIC ACCELERATORS
DATA
DELTA BARYONS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
GEV RANGE
HADRON-HADRON INTERACTIONS
HADRONS
INFORMATION
INTERACTIONS
MESONS
N BARYONS
NUCLEON BEAMS
NUCLEON-NUCLEON INTERACTIONS
NUCLEONS
NUMERICAL DATA
PARTICLE BEAMS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PHOTOPRODUCTION
PIONS
PROTON-NUCLEON INTERACTIONS
PSEUDOSCALAR MESONS
SPECTRA
SYNCHROTRONS
645101* - High Energy Physics- Particle Interactions & Properties-Experimental- Electromagnetic Interactions & Properties