Test of Parity Conservation in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mo>−</mml:mo><mml:mi>p</mml:mi></mml:math>Scattering

Potter, J. M.; Bowman, J. D.; Hwang, C. F.; McKibben, J.L.; Mischke, R. E.; Nagle, D. E.; Debrunner, Peter G.; Frauenfelder, Hans; Sorensen, L. B.

doi:10.1103/physrevlett.33.1307

Cited by 102 publications

(37 citation statements)

References 11 publications

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“…Such experiments require measurements of asymmetries ∼ 10 −7 , which is the natural scale for the ratio of weak and strong amplitudes, 4πG F m 2 π /g 2 πN N . Only a single N N measurement, the longitudinal analyzing power A z for p + p, has been successful (40,41,42). (Experiments have been done at 13.6, 45, and 221 MeV.)…”

Section: The Hadronic Weak Interactionmentioning

confidence: 99%

ATOMIC PARITY NONCONSERVATION AND NUCLEAR ANAPOLE MOMENTS

Haxton

Wieman

2001

Annu. Rev. Nucl. Part. Sci.

142

131

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Anapole moments are parity-odd, time-reversal-even moments of the E1 projection of the electromagnetic current. Although it was recognized, soon after the discovery of parity violation in the weak interaction, that elementary particles and composite systems like nuclei must have anapole moments, it proved difficult to isolate this weak radiative correction. The first successful measurement, an extraction of the nuclear anapole moment of 133 Cs from the hyperfine dependence of the atomic parity violation, was obtained only recently. An important anapole moment bound in Tl also exists. We discuss these measurements and their significance as tests of the hadronic weak interaction, focusing on the mechanisms that operate within the nucleus to generate the anapole moment. The atomic results place new constraints on weak meson-nucleon couplings, ones we compare to existing bounds from a variety of p − p and nuclear tests of parity nonconservation.

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Section: The Hadronic Weak Interactionmentioning

confidence: 99%

ATOMIC PARITY NONCONSERVATION AND NUCLEAR ANAPOLE MOMENTS

Haxton

Wieman

2001

Annu. Rev. Nucl. Part. Sci.

142

131

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“…These experiments have been performed on basic two-nucleon systems (1)(2)(3)(4) and also on more complex nuclei (for a summary, see ref. 5), with the emphasis on those nuclei where parity-violation effects ate enhanced and whose nuclear structure is well understood.…”

Section: Introductionmentioning

confidence: 99%

Measurement of parity violation in the photodisintegration of deuterium and in the production of bremsstrahlung on tantalum

Earle¹,

McDonald²,

Kidner³

et al. 1988

Can. J. Phys.

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The circular polarization dependent component of the total cross section for photodisintegration of deuterium has been measured: (2.7 ± 2.8) × 10−6 for bremsstrahlung with an end point of 4.1 MeV and (7.7 ± 5.3) × 10−6 for an end point of 3.2 MeV. The helicity-dependent component of the total cross section for the production of bremsstrahlung on tantalum by longitudinally polarized electrons has been measured: (0.63 ± 0.70) × 10−6 for an electron energy of 4.1 MeV and (3.1 ± 1.5) × 10−6 at 3.2 MeV. All measurements are in agreement with theoretical predictions for these processes.

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“…If half the neutrons are captured, the polarization of the downstream neutron beam is 100%. A test 3 He spin filter was demonstrated in a fall 2000 test run and the final version will be tested at the University of Michigan in fall 2002.…”

Section: Np → Dγ Experimentsmentioning

confidence: 99%

“…3 Measurements such as the circular γ-ray polarization from 21 Ne [30], or the longitudinal analyzing power in pα scattering [31], provide constraints on a combination of π, ρ, and ω couplings. The most precise limit on f π alone is believed to be from measurements of circularly polarized gamma rays from a parity mixed doublet in 18 F [32,33].…”

Section: Np → Dγ Experimentsmentioning

confidence: 99%

Parity Violation in p⃗p and n⃗p Experiments

Ramsay¹

2003

AIP Conference Proceedings

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Parity violation experiments involving only two nucleons provide a way to study the non-leptonic, strangeness-conserving part of the weak interaction in a clean measurement free of nuclear structure uncertainties. Such measurements are particularly appropriate for discussion at this conference as their success depends critically on the ability to accurately control and measure spin. Although simple in principle, the experiments are technically very demanding and great pains must be taken both in the preparation of the incident polarized beams and the measurement of the resultant parity violating asymmetries, which may be masked by a multitude of systematic effects. At low and intermediate energies, pp experiments are sensitive to the medium range part of the parity violating nucleon-nucleon force, usually parameterized in terms of rho and omega meson exchange. The pion does not contribute to parity violation in the pp experiments, as the π 0 is its own antiparticle and parity violation would also imply CP violation. I review existing pp measurements with particular emphasis on the recent 221 MeV pp measurement at TRIUMF which permitted the weak meson-nucleon coupling constants h pp ρ and h pp ω to be determined separately for the first time. The np experiments, on the other hand, are used to extract the weak pion nucleon coupling, f π , describing the longest range part of the parity violating nucleonnucleon force. The np system is the only two nucleon system that is sensitive to f π . I also review these experiments, with specific details of the np → dγ experiment now under preparation at Los Alamos National Laboratory.

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Test of Parity Conservation inp−pScattering

Cited by 102 publications

References 11 publications

ATOMIC PARITY NONCONSERVATION AND NUCLEAR ANAPOLE MOMENTS

ATOMIC PARITY NONCONSERVATION AND NUCLEAR ANAPOLE MOMENTS

Measurement of parity violation in the photodisintegration of deuterium and in the production of bremsstrahlung on tantalum

Parity Violation in p⃗p and n⃗p Experiments

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