Observations of the Failure of Conservation of Parity and Charge Conjugation in Meson Decays: the Magnetic Moment of the Free Muon

Garwin, Richard L.; Lederman, Leon M.; Weinrich, Marcel

doi:10.1103/physrev.105.1415

Cited by 752 publications

(333 citation statements)

References 5 publications

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“…In the development of quantum mechanics, parity conservation was assumed. It was not until the 1950s [1] that the possibility of parity violation was considered, and soon after it was definitively demonstrated experimentally in nuclear decays [2,3]. In the modern picture, P and CP violation in weak interactions are widely established experimentally and well understood theoretically.…”

Section: Introductionmentioning

confidence: 99%

Charge-dependent flow and the search for the chiral magnetic wave in Pb-Pb collisions atsNN=2.76TeV

Adam¹,

Adamová²,

Aggarwal³

et al. 2016

Phys. Rev. C

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We report on measurements of a charge-dependent flow using a novel three-particle correlator with ALICE in Pb-Pb collisions at the CERN Large Hadron Collider (LHC), and discuss the implications for observation of local parity violation and the chiral magnetic wave (CMW) in heavy-ion collisions. Charge-dependent flow is reported for different collision centralities as a function of the event charge asymmetry. While our results are in qualitative agreement with expectations based on the CMW, the nonzero signal observed in higher harmonics correlations indicates a possible significant background contribution. We also present results on a differential correlator, where the flow of positive and negative charges is reported as a function of the mean charge of the particles and their pseudorapidity separation. We argue that this differential correlator is better suited to distinguish the differences in positive and negative charges expected due to the CMW and the background effects, such as local charge conservation coupled with strong radial and anisotropic flow.

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Section: Introductionmentioning

confidence: 99%

Charge-dependent flow and the search for the chiral magnetic wave in Pb-Pb collisions atsNN=2.76TeV

Adam¹,

Adamová²,

Aggarwal³

et al. 2016

Phys. Rev. C

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“…In this work we report on the first calculation directly from QCD of the leading-order momentum-independent parity violating coupling between pions and nucleons, h 1 πN N , using n f = 2 + 1 lattice QCD calculations on configurations with a pion mass of m π ∼ 389 MeV. Parity violating interactions have been known since the late 1950s [1][2][3], and their discovery radically changed perceptions of the role of fundamental symmetries in particle physics. While these interactions can be studied in flavor-changing decays, the effects of the PV neutralcurrent in such decays are tiny as the tree-level coupling between quarks and the Z boson are flavor diagonal and radiative corrections are suppressed by the GIM mechanism [4,5].…”

mentioning

confidence: 99%

Lattice QCD calculation of nuclear parity violation

Wasem

2012

Phys. Rev. C

117

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We present the first lattice QCD calculation of the leading-order momentum-independent parity violating coupling between pions and nucleons, h 1 πNN . The calculation performs measurements on dynamical anisotropic clover gauge configurations, with a spatial extent of L ∼ 2.5 fm, a spatial lattice spacing of as ∼ 0.123 fm, and a pion mass of mπ ∼ 389 MeV. While this first calculation does not include non-perturbative renormalization of the bare parity-violating operators, a chiral extrapolation to the physical pion mass, or contributions from disconnected (quark-loop) diagrams, these are expected to result in systematic errors within the quoted statistical error. We find a contribution from the 'connected' diagrams of h 1,con πNN = (1.099 ± 0.505 +0.058 −0.064 ) × 10 −7 , consistent with current experimental bounds and previous model-dependent theoretical predictions.

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“…Standards in the United States: 5 working on an hypothesis advanced by the theoretical physicists Lee and Yang in '56 [Lee and Yang, 1957] [Garwin, Lederman and Weinrich, 1957]. The two letters have been published, one after the other, in the 105 Volume of Physical Review, 15 February issue (Letters to the Editor).…”

Section: On the Discovery Of Parity Violation And Its Explanationsmentioning

confidence: 99%

Toward a history of explanation in science communication: the case of Madame Wu experiment on parity violation

Bertozzi¹

2017

JCOM

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By focusing on a specific episode of 20th Century physics — the discovery of parity violation in 1957 — the paper presents a study of the types of explanations of the crucial experiment as they are found in different editorial categories: a peer-review journal, a popular science book, an encyclopedia and a newspaper articles. The study provides a fine-grained description of the mechanism of the explanation as elaborated in non-specialist accounts of the experiment and identifies original, key-explanatory elements which characterize them. In so doing, the paper presents a reflection on the processes of transformation and adaptation implied by the circulation of knowledge — which features as a productive process in its own right — and shows which further insights a focus on explanation can offer to the current historical researches on science communication.

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Observations of the Failure of Conservation of Parity and Charge Conjugation in Meson Decays: the Magnetic Moment of the Free Muon

Cited by 752 publications

References 5 publications

Charge-dependent flow and the search for the chiral magnetic wave in Pb-Pb collisions atsNN=2.76TeV

Charge-dependent flow and the search for the chiral magnetic wave in Pb-Pb collisions atsNN=2.76TeV

Lattice QCD calculation of nuclear parity violation

Toward a history of explanation in science communication: the case of Madame Wu experiment on parity violation

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