Parity-non-conservation in nuclear forces at low energy: phenomenology and questions

Desplanques, B.

doi:10.1016/s0370-1573(97)00072-0

Cited by 81 publications

(117 citation statements)

References 150 publications

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“…10 From these expressions, A d γ = − 0.17h 1 π . The coefficient of h 1 π in this result is nearly a factor of two larger than in previous wavefunction-based computations and has stimulated considerable follow-up theoretical activity (41,42,66,108,110).…”

Section: Recent Theoretical Workmentioning

confidence: 99%

“…We hope to provide the successor to that work, updating the authors' analysis in light of new theoretical and experimental progress. Because our focus is on new developments, we touch only lightly on older work that has been reviewed by Adelberger & Haxton and elsewhere (9)(10)(11). Before doing so in detail, however, it is useful to summarize the primary developments and shifts in emphasis that have occurred since Adelberger & Haxton's review appeared:…”

Section: Introductionmentioning

confidence: 99%

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Hadronic Parity Violation: A New View Through the Looking Glass

Ramsey-Musolf

Page

2006

Annu. Rev. Nucl. Part. Sci.

101

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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Section: Recent Theoretical Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hadronic Parity Violation: A New View Through the Looking Glass

Ramsey-Musolf

Page

2006

Annu. Rev. Nucl. Part. Sci.

101

123

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“…Thus it is discussed that the measurements of A γ could provide us an opportunity to determine the weak pion-nucleon coupling constant h 1 π . On the other hand, possibility of a 10% effect from the PV TPEP has been discussed [10].…”

Section: Introductionmentioning

confidence: 99%

Two-pion-exchange parity-violating potential and np → dγ

2007

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Abstract. We calculate the parity-violating nucleon-nucleon potential in heavy-baryon chiral perturbation theory up to the next-to-next-to-leading order. The one-pion exchange comes in the leading order and the next-to-next-to-leading order consists of two-pion-exchange and the two-nucleon contact terms. In order to investigate the effect of the higher order contributions, we calculate the parity-violating asymmetry in np → dγ at the threshold. The one-pion dominates the physical observable and the two-pion contribution is about or less than 10% of the one-pion contribution.PACS. 21.30.Fe Forces in hadronic systems and effective interactions -12.15.Ji Applications of electroweak models to specific processes

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“…In the meson exchange picture the NN weak interaction is modeled as a process in which the three lightest mesons (π, ρ, and ω) couple to one nucleon via the weak interaction at one vertex and to the second nucleon via the strong interaction at the other vertex. An attempt to calculate the weak meson-nucleon couplings of the HWI from the Standard Model using a valence quark model for QCD was first made by Desplanques, Donoghue, and Holstein (the DDH paper [29]) in 1980 and later updated [30]. In the DDH model HWI observables are expressed in terms of six weak meson-nucleon coupling constants:…”

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confidence: 99%

Measurement of parity-violatingγ-ray asymmetry in the capture of polarized cold neutrons on protons

et al. 2011

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The NPDGamma collaboration reports results from the first phase of a measurement of the parity violating up-down asymmetry Aγ with respect to the neutron spin direction of γ-rays emitted in the reaction n + p → d + γ using the capture of polarized cold neutrons on the protons in a liquid parahydrogen target. One expects parity-odd effects in the hadronic weak interaction (HWI) between nucleons to be induced by the weak interaction between quarks. Aγ in n + p → d + γ is dominated by a ∆I = 1, 3 S1 − 3 P1 parity-odd transition amplitude in the n-p system. The first phase of the measurement was completed at the Los Alamos Neutron Science Center spallation source (LANSCE) with the result Aγ = (−1.2 ± 2.1 stat. ± 0.2 sys.) × 10 −7 . We also report the first measurement of an upper limit for the parity allowed left right asymmetry in this reaction, with the result Aγ,LR = (−1.8 ± 1.9 stat. ± 0.2 sys.) × 10 −7 . In this paper we give a detailed report on the theoretical background, experimental setup, measurements, extraction of the parity-odd and parity-allowed asymmetries, analysis of potential systematic effects, and the LANSCE results. The asymmetry has an estimated size of 5 × 10 −8 and the aim of the NPDGamma collaboration is to measure it to 1 × 10 −8 . The second phase of the measurement will be performed at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory.

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Parity-non-conservation in nuclear forces at low energy: phenomenology and questions

Cited by 81 publications

References 150 publications

Hadronic Parity Violation: A New View Through the Looking Glass

Hadronic Parity Violation: A New View Through the Looking Glass

Two-pion-exchange parity-violating potential and np → dγ

Measurement of parity-violatingγ-ray asymmetry in the capture of polarized cold neutrons on protons

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