Measurement of charge symmetry breaking in {ital np} elastic scattering at 350 MeV

Journal Article · Sat Jul 15 04:00:00 EDT 1995 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.48648· OSTI ID:165852

Abegg, R ^[1]; Berdoz, A R; Birchall, J; Campbell, J R ^[2]; Davis, C A ^[1]; Delheij, P P.J. ^[1]; Gan, L ^[2]; Green, P W ^[1]; Greeniaus, L G ^[3]; Healey, D C; Helmer, R ^[1]; Kolb, N; Korkmaz, E; Lee, L ^[3]; Levy, C D.P. ^[1]; Li, J ^[3]; Miller, C A ^[1]; Opper, A K ^[3]; Page, S A ^[2]; Postma, H ^[4] ; Ramsay, W D ^[2]; Soukup, J ^[3]; Stinson, G M ^[1]; van Oers, W T.H. ^[2]; Zelenski, A N ^[1]; Zhao, J ^[2]

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1. TRIUMF, 4004 Wesbrook Mall, Vancouver, B.C. V6T 2A3 (Canada)
2. University of Manitoba, Winnipeg, Manitoba, R3T 2N2 (Canada)
3. University of Alberta, Edmonton, Alberta, T6G 2N5 (Canada)
4. Technische Hogeschool, Delft, The Netherlands, 2600 GA (Netherlands)

TRIUMF Experiment 369, a measurement of charge symmetry breaking in {ital np} elastic scattering at 350 MeV, has completed data taking. Scattering asymmetries were measured with a polarized (unpolarized) neutron beam incident on an unpolarized (polarized) frozen spin target. Coincident scattered neutrons and recoil protons were detected by a mirror symmetric detection system in the center-of-mass angle range from 50{degree}--90{degree}. A preliminary result for the difference of the zero-crossing angles, where analyzing powers cross zero, is {Delta}{theta}{sub cm} =0.445{degree}{plus_minus}0.054{degree}(stat.){plus_minus}0.051{degree}(syst.) based on fits over the angle range 53.4{degree}{le}{theta}{sub cm}{le}86.9{degree}. The difference of the analyzing powers {Delta}{ital A}{equivalent_to}{ital A}{sub {ital n}}{minus}{ital A}{sub {ital p}}, where the subscripts denote polarized nucleons, was deduced with {ital dA}/{ital d}{theta}{sub cm}=({minus}1.35{plus_minus}0.05){times}10{sup {minus}2} deg{sup {minus}1} to be [60{plus_minus}7(stat.){plus_minus}7(syst.){plus_minus}2(syst.)] {times}10{sup {minus}4}.

• Sponsoring Organization: USDOE
• OSTI ID: 165852
• Report Number(s): CONF-9409103--
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 339; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ELASTIC SCATTERING
ELECTRIC CHARGES
HYDROGEN 1 TARGET
MEV RANGE 100-1000
NEUTRON REACTIONS
NUCLEON-NUCLEON INTERACTIONS
POLARIZATION-ASYMMETRY RATIO
POLARIZED TARGETS
SYMMETRY BREAKING