98 research outputs found

    Klatchko (Doctor), Mischa & Daughter Masha Michalevona, [No Service Number]

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    This record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/397511Surname: KLATCHKO (DOCTOR). Given Name(s) or Initials: MISCHA & DAUGHTER MASHA MICHALEVONA. Military Service Number or Last Known Location: [No Registration Number]. Missing, Wounded and Prisoner of War Enquiry Card Index Number: 25096.235733 Item: [2016.0049.29804] "Klatchko (Doctor), Mischa & Daughter Masha Michalevona, [No Service Number]

    [Diary Entry for Tuesday, April 30, 1940]

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    This page is part of a diary by Sir Ellice Victor Elias Sassoon. He writes about going to lunch with Maria and seeing ''When the Rains Came.'' He then said that he went with Maria after dinner to Arcadia where Sandy and Johnny Morris joined them and that Dr. Klatchko came to their table. Photographs attached to page from top: Maria and Klatchko; Maria and John Morris

    Fractal dimensions from a three-dimensional intermittency analysis in e+e− annihilation

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    The intermittency structure of multihadronic e+e- annihilation is analyzed by evaluating the factorial moments F2-F5 in three-dimensional Lorentz invariant phase space as a function of the resolution scale. We interpret our data in the language of fractal objects. It turns out that the fractal dimension depends on the resolution scale in a way that can be attributed to geometrical resolution effects and dynamical effects, such as the pi-O Dalitz decay. The LUND 7.2 hadronization model provides an excellent description of the data. There is no indication of unexplained multiplicity fluctuations in small phase space regions

    An Experimental-study of the Process Gamma-gamma-]pi+pi-

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    Using the CELLO detector, we have measured cross sections for the process gammagamma --> pi+pi- in the mass range 0.75-1.9 GeV/c2. A partial wave fit to the data indicates the presence of a sizeable S-wave amplitude with signs of resonant behaviour. Values for the gammagamma width of the f2(1270) are given, showing the model-dependence of this quantity. At higher dipion masses, the model of Brodsky and Lepage 's found to give an order of magnitude description of the data

    A measurement of the π0, η and η′ electromagnetic form factors

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    We present measurement of the π0γ*γ, ηγ*γ and η′γ*γ form factors. The π0-form factor is for the first time observed in the space-like region. The transition form factor of the η-meson is determined from its decay modes π+π-π0, π+π-γ and the neutral decay mode γγ. The decay of the η′ is observed in the decay channels ργ, ηπ+π- with η→γγ and in the four charged prong final state stemming from ηπ+π- with the η decaying into π+π-(π0/γ). All form factors agree well with a simple ρ-pole predicted by the vector meson dominance model and also with the QCD inspired Brodsky-Lepage model. © 1991 Springer-Verlag

    Limits on electron compositeness from Bhabha scattering

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    We have studied the reactione+e−→e+e− using data taken by the CELLO detector at 35 GeV centre of mass energy with an integrated luminosity of 86 pb−1. The differential cross section is found to agree with the Standard Model and is used to set limits on possible deviations from the pointlike structure of the electron. The lower limits obtained for the compositeness scale Λ range from 0.8 to 6.0 TeV (95% C.L.), depending on the structure of the current

    Global properties of pion production in the reaction γγ→3π+3π-

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    We have studied the properties of pion production in the reaction γ→3π+3π− in the energy range 1.6⩽Wγγ⩽7.5 GeV with the CELLO detector at PETRA. We present the topological cross section both for Q2≈0 (anti-tag) and Q2≈0 (single-tag). The Q2 dependence of the cross section is flatter than the GVDM prediction. The distribution of the production angle of the pions in the CMS peaks at small angles, indicating a peripheral process. In accordance with the VDM picture the pT distribution of the pions manifests an exponential fall-off. Like sign pion pairs were found to be Bose-Einstein correlated. We use this correlation to estimate the spatial dimensions of the interaction region
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