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    • Plusieurs versions

    Comment on "Time modulation of the K-shell electron capture decay rates of H-like heavy ions at GSI experiments"

    Lipkin, Harry J
    Physical review letters, 16 April 2010, Vol.104(15), pp.159203; author reply 159204 [Revue évaluée par les pairs]

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    Beta decay for pedestrians

    Lipkin, Harry J
    Amsterdam : North-Holland
    1962
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    Titre: Beta decay for pedestrians / by Harry J. Lipkin
    Auteur: Lipkin, Harry J
    Editeur: Amsterdam : North-Holland
    Date: 1962
    Collation: VIII, 117 p. : ill. ; 22 cm
    Collection: Series in physics
    Documents dans cette collection: Series in physics
    Classification: LC QC793.5
    No RERO: 0151812
    Permalien:
    http://data.rero.ch/01-0151812/html?view=FR_V1

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    Lie groups for pedestrians

    Lipkin, Harry J
    Amsterdam : North-Holland
    1965
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    Titre: Lie groups for pedestrians / by Harry J. Lipkin
    Auteur: Lipkin, Harry J
    Editeur: Amsterdam : North-Holland
    Date: 1965
    Collation: IX, 162 p. : fig. ; 22 cm
    Sujet RERO: Lie, Groupes de
    Note: Bibliogr.: p. 157-160
    Classification: LC QA387
    No RERO: 0247930
    Permalien:
    http://data.rero.ch/01-0247930/html?view=FR_V1

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    Anwendung von Lieschen Gruppen in der Physik

    Lipkin, Harry J
    Mannheim : Bibliographisches Institut
    1967
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    Titre: Anwendung von Lieschen Gruppen in der Physik / von Harry J. Lipkin
    Auteur: Lipkin, Harry J
    Editeur: Mannheim : Bibliographisches Institut
    Date: 1967
    Collation: 176 p. : ill.
    Collection: B.I.-Hochschultaschenbücher ; Bd. 163/163a
    Documents dans cette collection: BI-Hochschultaschenbücher
    Classification: IMATH E-5
    No RERO: R004644045
    Permalien:
    http://data.rero.ch/01-R004644045/html?view=FR_V1

    • Plusieurs versions

    Comment on 'Time Modulation of the K-Shell Electron Capture Decay Rates of H-like Heavy Ions at GSI Experiments'

    Lipkin, Harry J
    Physical Review Letters, 16 April 2010, Vol.104(15) [Revue évaluée par les pairs]
    SciTech Connect (U.S. Dept. of Energy - Office of Scientific and Technical Information)
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    Titre: Proceedings of the Rehovoth Conference on Nuclear Structure : held at the Weizmann Institute of Science, Rehovoth, September 8-14, 1957 / ed. by H.J. Lipkin ; under the auspices of the International Union of Pure and Applied Physics (IUPAP)
    Auteur: Lipkin, Harry J
    Editeur: Amsterdam : North Holland
    Date: 1958
    Collation: XVI, 614 p. : ill. ; 25 cm
    Congrès: Conference on Nuclear Structure (1957 : Rehovoth) - Union internationale de physique pure et appliquée. Conference (1957 : Rehovoth)
    Classification: LC QC793.3.S8
    No RERO: R277032760
    Permalien:
    http://data.rero.ch/01-R277032760/html?view=FR_V1

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    Titre: New $B^{\pm}\to K\pi$ data explain absence of CP violation Tree-penguin interference canceled by Pauli effects
    Auteur: Lipkin, Harry J.
    Sujet: High Energy Physics - Phenomenology
    Description: Observation of CP violation in $B^o\to K^\pm\pi^{\mp}$ decays and its absence in $B^+\to K^+\pi^o$ decays are explained in new improved data analysis of more precise $B\to K\pi$ data. Success of the "Lipkin Sum Rule" indicates that four $B\tow K\pi$ branching ratios are determined by three parameters, the penguin diagram $P$ and two interference terms $P\cdot T$ and $P\cdot S$ between the dominant penguin and two tree diagrams; the color-favored and color suppressed diagrams. Previous analyzes confirmed the model with errors leaving values of interference terms less that two standard deviations from zero. The observation CP violation in $B^o\to K^\pm\pi^{\mp}$ decays indicates a finite value for $P\cdot T$. New precise data analysis show $P\cdot T$ and $P\cdot S$ interference contributions well above errors. Their contributions to $B^\pm\to K\pi$ decays are shown to be nearly equal with opposite phase and cancel within experimental errors. This cancelation unexpected in previous analyzes explains the failure to see CP violation in $B^\pm\to K\pi$ decays. It can be due to the Pauli antisymmetry exchange neglected in previous analyzes. Two $B^\pm\to K\pi$ tree diagrams differ by interchange of two identical $u$ quarks. $B^o\to K^\pm\pi^{\mp}$ diagrams have no identical quark pairs. This Pauli effect explains the difference produced by changing the flavor of the spectator quark which does not participate in the weak interaction. Our analysis differs from previous analyzes which assume SU(3) flavor symmetry to use input from $B\to \pi\pi$ data and neglect Pauli effects. We use new data, include Pauli effects and strong final state interactions to all orders in QCD with no higher flavor symmetry assumed beyond isospin. We do not use $B\to \pi\pi$ data. Comment: 21 pages, 3 figurew
    Identifiant: 1102.4700 (ARXIV ID)

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    Directed Spontaneous Emission from $N$-atom Extended Ensemble

    Lipkin, Harry J.
    Cornell University
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    Titre: Directed Spontaneous Emission from $N$-atom Extended Ensemble
    Auteur: Lipkin, Harry J.
    Sujet: Condensed Matter - Other Condensed Matter ; Physics - Atomic Physics
    Description: Coherence and interference play crucial roles in emission and absorption of photons to and from large systems with many atoms. Confusion has arisen because nuclear X-ray physicists and atomic quantum-optics physicists do not understand one another's individual descriptions of related phenomena. Basic physics same for all wave lengths from optical to nuclear gamma ray photons. But different languages are used to describe this physics in different domains. Crucial parameters vary over many orders of magnitude and what is intuitive or counterintuitive varies widely. Differences in parameters arising from differences between coherent emission effects in different domains produce very different results. Unified general treatment of the entire photon spectrum makes basic physics intelligible to all. In the optical region the mean distance between the scattering atoms is much longer than the photon wave length, Dicke superradiant scattering is isotropic and multiple scattering, Fano couplings are important and the lifetimes of intermediate stats are sufficiently short to be negligible. In X-ray scattering the mean distance between atoms is comparable to the photon wave length, Dicke superradiance is concentrated in a forward peak, multiple scattering and Fano effects are negligible, lifetimes are measurably long, speedup shortening the lifetime is important and most of the radiation is not elastically scattered but lost to absorption. Explicit calculations for a one-dimensional array shows the great difference between the case where the photon wave length is much shorter or comparable to the distance between nearest neighbors. A full investigation of the angular distribution and speedup of the intensity for two and three-dimensional scatterers give very different results for the two cases. Comment: 9 pages no figures
    Identifiant: 1202.3353 (ARXIV ID)

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    Titre: New Analysis of $B \rightarrow K\pi$ data with Pauli blocking CP violation in $B^o$ decays, not in $B^{\pm}$ SU(3) use of $B \rightarrow \pi\pi$ data invalid for $B \rightarrow K\pi$
    Auteur: Lipkin, Harry J.
    Sujet: High Energy Physics - Phenomenology
    Description: New data analysis with Pauli blocking explains observation of CP violation in $B^o\rightarrow K\pi$ decays, absence in $B^{\pm} \rightarrow K\pi$ decays and gives new predictions agreeing with experiment. Branching ratio data show pure I=1/2 amplitude predicted by pure penguin transitions for separate relations within charged and neutral B decays, but strong violation of penguin I=1/2 isospin relation between charged and neutral decays. $B(B^o \rightarrow K^+ \pi^-) - 2B(B^o\rightarrow K^o \pi^o) = %(19.4 \pm 0.6)- 2\cdot (9.4 \pm 0.6) = (0.6 \pm 1.3)\cdot 10^-6 \approx 0$ $2B(B^+ \rightarrow K^+ \pi^o) - B(B^+ \rightarrow K^o \pi^+) = %(25.8\pm 1.2) - (23.1 \pm 1.0) = (2.7 \pm 1.6)\cdot 10^-6 \approx 0$ ${{\tau^o}\over{\tau^+}}\cdot 2B(B^+ \rightarrow K^+ \pi^o) - B(B^o \rightarrow K^+ \pi^-) = (4.7 \pm 0.82)\cdot 10^-6 \not= 0$ This contrast between pure I=1/2 observed in individual charged and neutral final states and I=1/2 violation in relations between them is unexpected in previous treatments. Pauli blocking predicts this contrast by noting that two identical $u$ quarks in a relative s-wave are Pauli blocked. Tree diagram $\bar b\rightarrow \bar s u \bar u$ for $\bar b$ producing $u$ quark at weak vertex and tree-penguin interference producing CP violation are Pauli suppressed for $B^+$ decays with identical $u$ quark spectator. No suppression in $B^o$ decays with spectator $d$ quark. $B\rightarrow K\pi$ data analysis discards all amplitudes containing two identical $u$ quarks in final state and predicts observed isospin relations by using only Pauli-favored amplitudes ${B_u}\rightarrow \bar s du \bar d$ and ${B_d}\rightarrow \bar s ud \bar u$. Pauli-favored transitions explain dependence on flavor of spectator quark which does not participate in the weak interaction. Comment: 9 pages, no figurew
    Identifiant: 1107.1888 (ARXIV ID)

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    Titre: Entangled symmetries explain without QCD dynamics CP violation in neutral B to Kpi decays; not in charged B decays Unexpected isospin relations in charged and neutral decays,
    Auteur: Lipkin, Harry J.
    Sujet: High Energy Physics - Phenomenology
    Description: Simple flavor symmetry argument without QCD dynamics shows why CP violation observed in neutral $B$ to $K\pi$ decays is absent in charged B decays where tree diagram final state has two $u$ quarks satisfying Pauli principle. Entanglement preserves short range symmetry correlations after separation into two mesons. Pauli principle and symmetries require totally flavor-symmetric tree diagram final state. $\pi \pi$ isospin state with I=2 already is flavor symmetric and suffers no symmetry constraint. Strange flavor-symmetric state with V spin V=2 is linear combination of $K\pi$ and $K \eta$ with probability only (1/4) for $K\pi$. Tree diagram suppression by factor 4 not present in neutral decays explains negligible tree-penguin interference and CP violation in charged decays. Detailed full symmetry analysis shows constraints from space-inversion, charge conjugation, Pauli antisymmetrization and flavor symmetry. Two antiquarks produced at same space point by tree diagram have even parity. Even parity final state requires even parity, even space symmetry and color-spin antisymmetry for two $u$ quarks. Color-singlet spin-singlet final state requires color-spin antisymmetry and therefore flavor symmetry for two-antiquark wave function. Flavor symmetric $\bar u \bar d$ and $\bar u \bar s$ antiquark pairs have isospin I=1 and V-spin V =1. Generalized charge conjugation invariance requires I=2 for $\pi\pi$ tree diagram and V = 2 for $K\pi$. Penguin decays give I = 1/2 final state and no CP violation. Experiments confirm surprising predictions from tree suppression factor not noted in previous analyzes. I=1/2 violations seen only in relation between charged and neutral decays together with no I=3/2 components in each individual decay. Common treatments using $\pi \pi$ data fail to fit $K\pi$ data. Comment: 18 pages, 3 figures. arXiv admin note: substantial text overlap with arXiv:1105.3443, arXiv:1102.4700, and arXiv:1107.1888
    Identifiant: 1203.4541 (ARXIV ID)