43 research outputs found

    Search for effective Lorentz and CPT violation using ZEUS data

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    Lorentz and CPT symmetry in the quark sector of the Standard Model are studied in the context of an effective field theory using ZEUS e±p data. Symmetry-violating effects can lead to time-dependent oscillations of otherwise time-independent observables, including scattering cross sections. An analysis using five years of inclusive neutral-current deep inelastic scattering events corresponding to an integrated HERA luminosity of 372 pb-1 at s=318 GeV has been performed. No evidence for oscillations in sidereal time has been observed within statistical and systematic uncertainties. Constraints, most for the first time, are placed on 42 coefficients parametrizing dominant CPT-even dimension-four and CPT-odd dimension-five spin-independent modifications to the propagation and interaction of light quarks

    Analysis of structure of intraventricular blood flow based on studies of architectonics of trabecular layer in left ventricle

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    Aims To overcome numerous contradictions in the knowledge of the blood transportation, a hypothesis was supposed asserting the swirling pattern of blood flow in the heart and main vessels which resembles tornado-like flows and which is widespread in nature. These flows can be exhaustively described by the exact solutions of the nonstationary hydrodynamic Navier-Stokes equations and the continuity equations for the class of viscous swirling flows offered by Kiknadze - Krasnov. Materials and methods Using morphometric studies of human and canine left ventricular casts and Multislice Computed Tomography it has been shown that the trabeculae in the ventricular cavity are oriented along the streamlines of the tornado-like flow of appropriate dimension. Moreover, this principle covers both the diastolic trabeculae of the inlet part of the left ventricle and the systolic trabeculae of the outlet part of the left ventricle. Results It is concluded that the main trabeculae function consists in the structural organization of the intraventricular tornado-like swirling flow of Kiknadze – Krasnov type. Conclusion The hydrodynamic analysis of the blood flow laws is indispensable for the development of new diagnostics criteria in cardiology, cardiac surgery optimization, the design of new implantable and paracorporal devices contacting with blood flow and mathematical and physical modeling of circulation

    Development, Creation, Providing Manufacture and Involving Group of Models Local Modern Passenger Cars for Fast Transportations

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    Розробка, створення, освоєння виробництва та впровадження сімейства моделей вітчизняних пасажирських вагонів для швидкісних перевезень / Ю. М. Федюшин, Л. М. Лобойко, О. М. Пшінько, С. В. Мямлін [та інш.] // Вісн. Дніпропетр. нац. ун-ту залізн. трансп. ім. акад. В. Лазаряна. — Дніпропетровськ, 2005. — Вип. 7. — С. 5—24.UA: Розкрито основні етапи створення та освоєння виробництва й впровадження сімейства швидкісних пасажирських вагонів на ВАТ «КВБЗ» спільно з провідними науковими організаціями.RU: Раскрыты основные этапы создания, освоения производства и внедрения семейства скоростных пассажирских вагонов на ОАО «КВСЗ» совместно с ведущими научными организациями.EN: In article the basic stages of creation, development of production and introduction of family of high-speed carriages on Open Society «КВСЗ» together with the leading scientific organizations are opened.Укрзалізниця; Український науково-дослідний інститут вагонобудування; ВАТ «Крюківський вагонобудівний завод»; НВП «Хартрон-Експрес ЛТД»

    Search for effective Lorentz and CPT violation using ZEUS data

    No full text
    Lorentz and CPT symmetry in the quark sector of the Standard Model are studied in the context of an effective field theory using ZEUS e±pe^{\pm}p data. Symmetry-violating effects can lead to time-dependent oscillations of otherwise time-independent observables, including scattering cross sections. An analysis using five years of inclusive neutral-current deep inelastic scattering events corresponding to an integrated luminosity of 372 pb1^{-1} at s=318\sqrt{s} = 318 GeV has been performed. No evidence for oscillations in sidereal time has been observed within statistical and systematic uncertainties. Constraints, most for the first time, are placed on 42 coefficients parameterising dominant CPT-even dimension-four and CPT-odd dimension-five spin-independent modifications to the propagation and interaction of light quarks

    Physics at the CLIC e+e\mathrm{e^{+}e^{-}} Linear Collider Input to the Snowmass process 2013

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    This paper summarizes the physics potential of the CLIC high-energy e+e- linear collider. It provides input to the Snowmass 2013 process for the energy-frontier working groups on The Higgs Boson (HE1), Precision Study of Electroweak Interactions (HE2), Fully Understanding the Top Quark (HE3), as well as The Path Beyond the Standard Model -- New Particles, Forces, and Dimensions (HE4). It is accompanied by a paper describing the CLIC accelerator study, submitted to the Frontier Capabilities group of the Snowmass process

    Impact of jet-production data on the next-to-next-to-leading-order determination of HERAPDF2.0 parton distributions

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    The HERAPDF2.0 ensemble of parton distribution functions (PDFs) was introduced in 2015. The final stage is presented, a next-to-next-to-leading-order (NNLO) analysis of the HERA data on inclusive deep inelastic epep scattering together with jet data as published by the H1 and ZEUS collaborations. A perturbative QCD fit, simultaneously of αs(MZ2)\alpha_s(M_Z^2) and and the PDFs, was performed with the result αs(MZ2)=0.1156±0.0011 (exp) 0.0002+0.0001 (model\alpha_s(M_Z^2) = 0.1156 \pm 0.0011~{\rm (exp)}~ ^{+0.0001}_{-0.0002}~ {\rm (model}+ parameterisation) ±0.0029 (scale){\rm +~parameterisation)}~ \pm 0.0029~{\rm (scale)}. The PDF sets of HERAPDF2.0Jets NNLO were determined with separate fits using two fixed values of αs(MZ2)\alpha_s(M_Z^2), αs(MZ2)=0.1155\alpha_s(M_Z^2)=0.1155 and 0.1180.118, since the latter value was already chosen for the published HERAPDF2.0 NNLO analysis based on HERA inclusive DIS data only. The different sets of PDFs are presented, evaluated and compared. The consistency of the PDFs determined with and without the jet data demonstrates the consistency of HERA inclusive and jet-production cross-section data. The inclusion of the jet data reduced the uncertainty on the gluon PDF. Predictions based on the PDFs of HERAPDF2.0Jets NNLO give an excellent description of the jet-production data used as input
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