Angular distribution in π→μ+ν decay

Frota-Pessoa, E.; Margem, N.

doi:10.1007/bf02746333

Cited by 3 publications

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“…In a third group of experiments [13,14,15,16,17,18,19,20,21,22,23] the distributions of muons were observed to be isotropic. In order to show that using their techniques would result in an isotropic muon distribution if the pions were not polarized, in 1965, Hulubei et.…”

Section: Introductionmentioning

confidence: 92%

“…It is not surprising that he concluded, "the results of two experiments, which seems to be the safe part of scanning of this stack, are in good agreement with isotropy." Hulubei et al [1] commented on an earlier work by Frota-Pessoa and Margem [24] in that regard, "The experiment was performed on plates from our stack and would therefore seem to be most appropriate for a comparison. Unfortunately, the conclusions drawn in that paper are based on qualitative considerations.…”

Section: Introductionmentioning

confidence: 95%

“…In a third group of experiments [17][18][19][20][21][22][23][24] the distributions of muons were observed to be isotropic. In order to show that using their techniques would result in an isotropic muon distribution if the pions were not polarized, in 1965, Hulubei et al [17] performed the experiment again under radically different conditions: the pions were produced in a high magnetic field with an emission angle of 180 degrees.…”

Section: Introductionmentioning

confidence: 98%

“…al. [1] commented on an earlier work by Frota-Pessoa and Margem [23] in that regard, "The experiment was performed on plates from our stack and would therefore seem to be most appropriate for a comparison. Unfortunately, the conclusions drawn in that paper are based on qualitative considerations.…”

Section: Introductionmentioning

confidence: 99%

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Pion-Muon Asymmetry Revisited

Perkins¹

2007

Int J Theor Phys

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Long ago an unexpected and unexplainable phenomena was observed. The distribution of muons from positive pion decay at rest was anisotropic with an excess in the backward direction relative to the direction of the proton beam from which the pions were created. Although this effect was observed by several different groups with pions produced by different means, the result was not accepted by the physics community, because it is in direct conflict with a large set of other experiments indicating that the pion is a pseudoscalar particle. It is possible to satisfy both sets of experiments if helicity-zero vector particles exist and the pion is such a particle. Helicity-zero vector particles have direction but no net spin. For the neutral pion to be a vector particle requires an additional modification to conventional theory as discussed herein. An experiment is proposed which can prove that the asymmetry in the distribution of muons from pion decay is a genuine physical effect because the asymmetry can be modified in a controllable manner. A positive result will also prove that the pion is NOT a pseudoscalar particle.Comment: 9 pages, 3 figure

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Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Pion-Muon Asymmetry Revisited

Perkins¹

2007

Int J Theor Phys

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Angular Distribution of Muons inπ−μDecay at Rest

et al. 1963

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Evidence for a significant departure from isotropy of the muon angular distribution from w-n decay at rest is presented, based on measurements of projected angles in two emulsion stacks, exposed to the Dubna and CERN synchrocyclotrons. Extensive control experiments concerning observational bias, distortion, and inhomogeneous detection efficiencies prove that the observed lack of isotropy cannot be reduced to such spurious effects.

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Isotropy inπ−μDecays

Frota-Pessoa¹

1969

Phys. Rev.

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An extensive analysis is made of all results on the angular distribution of 7T-JU decays in the nuclearemulsion stack used by Hulubei et al. Instead of the conclusion of their previous analyses, which favored anisotropy for this distribution, it is shown that there is some lack of agreement between the several experiments using plates from this stack. The results of two experiments, which seems to be the safe part of scanning of this stack, are in good agreement with isotropy.

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Angular distribution in π→μ+ν decay

Cited by 3 publications

References 0 publications

Pion-Muon Asymmetry Revisited

Pion-Muon Asymmetry Revisited

Angular Distribution of Muons inπ−μDecay at Rest

Isotropy inπ−μDecays

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