Structure of the Vacuum and Neutron and Neutrino Oscillations

Chang, Lay Nam; Chang, Ngee-Pong

doi:10.1103/physrevlett.45.1540

Cited by 48 publications

(42 citation statements)

References 9 publications

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“…Within the uncertainties the present result for σ(νn)/σ(νp) is in agreement with the results of previous neutrino experiments [5,6,7,8,9,10] as shown in Table 5. Small differences between the experiments may be understood by their different energy spectra and kinematic acceptances.…”

supporting

confidence: 82%

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Measurement of the Z/A dependence of neutrino charged-current total cross-sections

Topaksu

Wilquet

2003

Eur. Phys. J. C

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A relative measurement of total cross-sections is reported for polyethylene, marble, iron, and lead targets for the inclusive charged-current reaction ν µ + N → µ − + X. The targets, passive blocks of ∼ 100 kg each, were exposed simultaneously to the CERN SPS wideband muon-neutrino beam over a period of 18 weeks. Systematic effects due to differences in the neutrino flux and detector efficiency for the different target locations were minimised by changing the position of the four targets on their support about every two weeks. The relative neutrino fluxes on the targets were monitored within the same experiment using charged-current interactions in the calorimeter positioned directly downstream of the four targets. From a fit to the Z/A dependence of the total cross-sections a value is deduced for the effective neutron-to-proton cross-section ratio.

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supporting

confidence: 82%

“…In bubble chamber experiments it was possible to distinguish neutrino interactions on neutrons and protons in deuterium [5,6,7] and in freon [8] targets. The absolute value of σ(νp) was measured indirectly from interactions in hydrogen and a heavier target, neon [9] or iron [10].…”

Section: Introductionmentioning

confidence: 99%

Measurement of the Z/A dependence of neutrino charged-current total cross-sections

Topaksu

Wilquet

2003

Eur. Phys. J. C

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“…In analogy of the neutron oscillation to BCS theory [11], we note that the relation (30) is precisely a Lorentzinvariant version of the Bogoliubov transformation [13] which diagonalizes the Lagrangian (with ϵ …”

Section: Parity-doublet Theoremmentioning

confidence: 99%

“…(In contrast, the first ΔB ¼ 2 term preserves iγ 0 parity, while the second ΔB ¼ 2 term breaks iγ 0 parity.) An analogy of neutron oscillation in (5) to Bardeen-Cooper-Schrieffer (BCS) theory was emphasized at the early stage of the study of neutron oscillation [11].…”

Section: Effective δB = 2 Lagrangian For the Neutronmentioning

confidence: 99%

Parity-doublet representation of Majorana fermions and neutron oscillation

Fujikawa

Tureanu

2016

Phys. Rev. D

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We present a parity-doublet theorem for the representation of the intrinsic parity of Majorana fermions, which is expected to be useful also in condensed matter physics, and it is illustrated to provide a criterion of neutron-antineutron oscillation in a Bardeen-Cooper-Schrieffer type of effective theory with ΔB ¼ 2 baryon number-violating terms. The CP violation in the present effective theory causes no direct CP-violating effects in the oscillation itself, which is demonstrated by the exact solution, although it influences the neutron electric dipole moment in the leading order of small ΔB ¼ 2 parameters. An analog of Bogoliubov transformation, which preserves P and CP, is crucial in the analysis.

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“…[27]) to the end of the 1970s, some of the pioneering papers being Refs. [28][29][30][31][32][33][34][35][36][37][38][39]. The advent of the Large Hadron Collider (LHC) has prompted an understandable emphasis on models with predictions which are testable at mass scales of 1 TeV/c 2 or so (for the most up-to-date reviews, see Refs.…”

Section: Introductionmentioning

confidence: 99%

Neutron-antineutron oscillations beyond the quasifree limit

Davis

Young

2017

Phys. Rev. D

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Prompted by plans to conduct a new neutron oscillation experiment at the European Spallation Source (ESS), we consider issues associated with the magnetic field that must be present, some of which are potentially exacerbated by the significantly larger length l contemplated for the neutron propagation region. To this end, we introduce a stochastic model of the residual magnetic field within the propagation region which draws on features of magnetic profiles measured during the last free neutron oscillation experiment [conducted at the Institut Laue-Langevin (ILL) in the 1990's]. We average over both fluctuations in the magnetic field sampled by neutrons, and representative spectra of neutron speeds. We find that deviations from the quasi-free result for the antineutron probability do not depend quadratically on l (as a naive perturbative estimate would suggest) but increase only linearly with l. As regards the large spikes in the magnetic field which can be expected at, for example, joints in the magnetic shielding of the propagation region (despite compensating currents and magnetic idealization of the shield), we demonstrate that their effect scales, where D is the diameter of the cylindrical magnetic shielding. Our arguments suggest that, provided the dimensions of the propagation region are such that the ratiodoes not exceed the value pertinent to the ILL experiment, and these spikes occur close to either end of the propagation region, they can be neglected. We also establish that any large magnetic field encountered after the propagation region is exited will not diminish the probability for antineutron detection. For the range of values of l of most interest to the ESS experiment, it should suffice to improve on the level of magnetic suppression achieved at the ILL by a factor of two.

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Structure of the Vacuum and Neutron and Neutrino Oscillations

Cited by 48 publications

References 9 publications

Measurement of the Z/A dependence of neutrino charged-current total cross-sections

Measurement of the Z/A dependence of neutrino charged-current total cross-sections

Parity-doublet representation of Majorana fermions and neutron oscillation

Neutron-antineutron oscillations beyond the quasifree limit

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