Measurement of the analyzing power AN in pp elastic scattering in the CNI region with a polarized atomic hydrogen gas jet target
Creators
- 1. RIKEN, Wako, Saitama 351-0198, (Japan)
- 2. Kyoto University, Sakyo-ku, Kyoto 606-8502 (Japan)
- 3. Institute for Theoretical and Experimental Physics, 117259 Moscow (Russian Federation)
- 4. Brookhaven National Laboratory, Upton, NY 11973 (United States)
- 5. RIKEN BNL Research Center, Upton, NY 11973 (United States)
- 6. Yale University, New Haven, CT 06520 (United States)
- 7. Stony Brook University, Stony Brook, NY 11794 (United States)
- 8. RIKEN, Wako, Saitama 351-0198 (Japan)
- 9. Indiana University Cyclotron Facility, Bloomington, IN 47408 (United States)
- 10. University of Wisconsin, Madison, WI 53706 (United States)
Description
A precise measurement of the analyzing power AN in proton-proton elastic scattering in the region of 4-momentum transfer squared 0.001< vertical bar t vertical bar <0.032 (GeV/c)2 has been performed using a polarized atomic hydrogen gas jet target and the 100 GeV/c RHIC proton beam. The interference of the electromagnetic spin-flip amplitude with a hadronic spin-nonflip amplitude is predicted to generate a significant AN of 4-5%, peaking at -t∼0.003 (GeV/c)2. This kinematic region is known as the Coulomb nuclear interference region. A possible hadronic spin-flip amplitude modifies this calculable prediction. We present the first precise result of the CNI asymmetry and shape as a function of t. Our data are well described by the CNI prediction with the electromagnetic spin-flip alone and do not support the presence of a large hadronic spin-flip amplitude
Additional details
Identifiers
- DOI
- 10.1016/j.physletb.2006.06.008;
- arXiv
- arXiv:nucl-ex/0502022v1;
- PII
- S0370-2693(06)00712-X;
Publishing Information
- Journal Title
- Physics Letters. Section B
- Journal Volume
- 638
- Journal Issue
- 5-6
- Journal Page Range
- p. 450-454
- ISSN
- 0370-2693
- CODEN
- PYLBAJ
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 38062609
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- ASYMMETRY; BROOKHAVEN RHIC; ELASTIC SCATTERING; GEV RANGE; HYDROGEN; MOMENTUM TRANSFER; POLARIZATION-ASYMMETRY RATIO; PROTON BEAMS; PROTON-PROTON INTERACTIONS; SPIN; SPIN FLIP
- Descriptors DEC
- ACCELERATORS; ANGULAR MOMENTUM; BARYON-BARYON INTERACTIONS; BEAMS; DIMENSIONLESS NUMBERS; ELEMENTS; ENERGY RANGE; HADRON-HADRON INTERACTIONS; HEAVY ION ACCELERATORS; INTERACTIONS; NONMETALS; NUCLEON BEAMS; NUCLEON-NUCLEON INTERACTIONS; PARTICLE BEAMS; PARTICLE INTERACTIONS; PARTICLE PROPERTIES; PROTON-NUCLEON INTERACTIONS; SCATTERING; STORAGE RINGS
Optional Information
- Copyright
- Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.