Parity violation in the 0.734-eV neutron resonance in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">La</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>139</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>

Bowman, C.D.; Bowman, J. D.; Yuan, V. W.

doi:10.1103/physrevc.39.1721

Cited by 44 publications

(32 citation statements)

References 6 publications

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“…In particular, considering the full "reasonable ranges" of the DDH couplings covers the range of LEC values one would obtain from naturalness arguments. 5 The asymmetry in pp scattering constrains one particular linear combination of LECs in dEFT π . Here, we consider this as an estimate of the size of individual LECs.…”

Section: Parity-violating Asymmetry and Resultsmentioning

confidence: 99%

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Energy dependence of the parity-violating asymmetry of circularly polarized photons indγ⃗→npin pionless effective field theory

Vanasse

Schindler

2014

Phys. Rev. C

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We calculate the energy dependence of the asymmetry in the cross sections for circularly polarized photons on an unpolarized deuteron target in d γ → np in pionless effective field theory. By matching the parity-violating low-energy constants to different sets of corresponding model parameters we obtain estimates for the asymmetry. In addition we calculate a possible figure of merit for the asymmetry in order to assess the preferred photon energy at which to perform a possible future experiment at a high-intensity photon source. *

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Section: Parity-violating Asymmetry and Resultsmentioning

confidence: 99%

“…Ref. [5]. However, many-body effects significantly complicate the theoretical analysis in terms of nucleonnucleon (NN) interactions.…”

Section: Introductionmentioning

confidence: 99%

Energy dependence of the parity-violating asymmetry of circularly polarized photons indγ⃗→npin pionless effective field theory

Vanasse

Schindler

2014

Phys. Rev. C

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“…By transmitting such a weaklypolarized beam through a second 139 La target, one can realize a measurement of the P-odd asymmetry in which the 139 La targets act as both a polarizer and as a polarization analyzer, resulting in the aptly-named 'Double Lanthanum' measurement method. Although the beam polarization produced on the parity-odd 0.7 eV resonance in 139 La is small [21] [22], its use in this configuration eliminates certain systematic errors associated with measuring P , especially the absolute knowledge of the neutron beam polarization f n . In this paper we describe how our apparatus may be modified to accommodate setups for both the 'Double Lanthanum' P measurement method as well as a traditional P measurement using a 3 He neutron spin filter.…”

Section: Introductionmentioning

confidence: 99%

A modular apparatus for use in high-precision measurements of parity violation in polarized eV neutron transmission

Schaper

Auton

Barrón‐Palos

et al. 2020

Nuclear Instruments and Methods in Physics Research Section A:

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We describe a modular apparatus for use in parity-violation measurements in epithermal neutron-nucleus resonances with high instantaneous neutron fluxes at the Manuel Lujan Jr. Neutron Scattering Center at Los Alamos National Laboratory. This apparatus is designed to conduct high-precision measurements of the parity-odd transmission asymmetry of longitudinally polarized neutrons through targets containing nuclei with p-wave neutronnucleus resonances in the 0.1-10 eV energy regime and to accommodate a future search for time reversal violation in polarized neutron transmission through polarized nuclear targets. The apparatus consists of an adjustable neutron and gamma collimation system, a 3 He-4 He ion chamber neutron flux monitor, two identical cryostats for target cooling, an adiabatic eV-neutron spin flipper, a near-unit efficiency 6 Li-7 Li scintillation detector operated in current mode, a flexible CAEN data acquisition system, and a neutron spin filter based on spin-exchange optical pumping of 3 He gas. We describe the features of the apparatus design devoted to the suppression of systematic errors in parity-odd asymmetry measurements. We describe the configuration of the apparatus used to conduct a precision measurement of parity violation at the 0.7 eV p-wave resonance in 139 La which employs two identical 139 La targets, one to polarize the beam on the p-wave resonance using the weak interaction and one to analyze the polarization.

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“…Ref. [6]. However, the theoretical description and interpretation of these systems in terms of the underlying NN interactions is considerably more complex than for few-nucleon systems.…”

Section: Introductionmentioning

confidence: 99%

Hadronic parity violation in effective field theory

Schindler¹

2016

Proceedings of the 8th International Workshop on Chiral Dynamics — PoS(CD15)

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Parity-violating interactions between nucleons are the manifestation of an interplay of strong and weak interactions between quarks in the nucleons. Because of the short range of the weak interactions, these parity-violating forces provide a unique probe of low-energy strong interactions. An ongoing experimental program is mapping out this weak component of the nuclear force in few-nucleon systems. Recent theoretical progress in analyzing and interpreting hadronic parity violation in such systems based on effective field theory methods is described. In particular, important information on parity-violating nucleon-nucleon interactions can be gained from an asymmetry in deuteron photodisintegration, which might be measurable at a future high-intensity photon source such as the proposed upgraded HIGS facility.

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Parity violation in the 0.734-eV neutron resonance inLa139

Cited by 44 publications

References 6 publications

Energy dependence of the parity-violating asymmetry of circularly polarized photons indγ⃗→npin pionless effective field theory

Energy dependence of the parity-violating asymmetry of circularly polarized photons indγ⃗→npin pionless effective field theory

A modular apparatus for use in high-precision measurements of parity violation in polarized eV neutron transmission

Hadronic parity violation in effective field theory

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