A monitor of beam polarization profiles for the TRIUMF parity experiment

TRIUMF experiment 497 has measured the parity violating longitudinal analyzing power, Az, in pp elastic scattering at 221.3 MeV incident proton energy. This comprehensive paper includes details of the corrections, some of magnitude comparable to Az itself, required to arrive at the final result. The largest correction was for the effects of first moments of transverse polarization. The addition of the result, Az = (0.84 ± 0.29(stat.) ± 0.17(syst.)) × 10 −7 , to the pp parity violation experimental data base greatly improves the experimental constraints on the weak meson-nucleon coupling constants h pp ρ and h pp ω , and also has implications for the interpretation of electron parity violation experiments.

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“…The PPMs are described in detail in [26]. Each PPM has four high density polyethylene (CH 2 ) blades, 5 mm x 1.6 mm in cross section.…”

Section: Polarization Profile Monitorsmentioning

confidence: 99%

Parity violation in proton-proton scattering at 221 MeV

Berdoz

Bírchall²,

Bland³

et al. 2003

Phys. Rev. C

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Parity Violation in Proton-Proton Scattering at 221 MeV

Berdoz¹,

Bírchall²,

Bland³

et al. 2001

Phys. Rev. Lett.

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The parity-violating longitudinal analyzing power, Az, has been measured in pp elastic scattering at an incident proton energy of 221 MeV. The result obtained is Az =(0.84 +/- 0.29 (stat.) +/- 0.17 (syst.)) x 10^{-7}. This experiment is unique in that it selects a single parity violating transition amplitude, 3P2-1D2, and consequently directly constrains the weak meson-nucleon coupling constant h^pp_rho When this result is taken together with the existing pp parity violation data, the weak meson-nucleon coupling constants h^pp_rho and h^pp_omega can, for the first time, both be determined.Comment: 8 pages RevTeX4, 3 PostScript figures. Conclusion revised. New information about weak coupling constants adde

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Hadronic Parity Violation: A New View Through the Looking Glass

Ramsey-Musolf

Page

2006

Annu. Rev. Nucl. Part. Sci.

102

123

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Key Words hadronic weak interaction, nuclear parity violation, effective field theory ■ Abstract Studies of the strangeness-changing hadronic weak interaction have produced a number of puzzles that have evaded a complete explanation within the Standard Model. Their origin may lie either in dynamics peculiar to weak interactions involving strange quarks or in more general aspects of the interplay between strong and weak interactions. In principle, studies of the strangeness-conserving hadronic weak interaction using parity-violating hadronic and nuclear observables provide a complementary window to this question. However, progress in this direction has been hampered by the lack of a suitable theoretical framework for interpreting hadronic parity violation measurements in a model-independent way. Recent work involving effective field theory ideas has led to the formulation of such a framework, simultaneously motivating the development of a number of new hadronic parity violation experiments in few-body systems. We review these recent developments and discuss the prospects and opportunities for further experimental and theoretical progress.

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A monitor of beam polarization profiles for the TRIUMF parity experiment

Cited by 3 publications

References 21 publications

Parity violation in proton-proton scattering at 221 MeV

Parity violation in proton-proton scattering at 221 MeV

Parity Violation in Proton-Proton Scattering at 221 MeV

Hadronic Parity Violation: A New View Through the Looking Glass

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