5,655 research outputs found

    Investigation of radiation and conduction of solids for spacecraft heat transfer applications Final report, 1 Jun. 1968 - 31 Jul. 1970

    Get PDF
    Thermal radiation and conduction phenomena in solids significant in design and thermal control of spacecraf

    Novel duality in disorder driven local quantum criticality

    Full text link
    We find that competition between random Kondo and random magnetic correlations results in a quantum phase transition from a local Fermi liquid to a spin liquid. The local charge susceptibility turns out to have exactly the same critical exponent as the local spin susceptibility, suggesting novel duality between the Kondo singlet phase and the critical local moment state beyond the Landau-Ginzburg-Wilson symmetry breaking framework. This leads us to propose an enhanced symmetry at the local quantum critical point, described by an O(4) vector for spin and charge. The symmetry enhancement serves mechanism of electron fractionalization in critical impurity dynamics, where such fractionalized excitations are identified with topological excitations

    On direction of spontaneous magnetization in a "cubic" ferromagnet

    Get PDF
    The magnetic properties of anisotropic films have been studied using 3D-neutron polarization analysis. The experimental facts refer to essential distinction of the sample states, magnetized in opposite directions. For an explanation of asymmetrical effects the model is offered, in which the fundamental theoretical principles of structural phase transitions are used.Comment: 4 pages LaTeX (phbauth) and 4 figures (epsfig

    Foreword

    Get PDF

    Charmed Baryon Weak Decays with SU(3) Flavor Symmetry

    Full text link
    We study the semileptonic and non-leptonic charmed baryon decays with SU(3)SU(3) flavor symmetry, where the charmed baryons can be Bc=(Ξc0,Ξc+,Λc+){\bf B}_{c}=(\Xi_c^0,\Xi_c^+,\Lambda_c^+), Bc′=(Σc(++,+,0),Ξc′(+,0),Ωc0){\bf B}'_{c}=(\Sigma_c^{(++,+,0)},\Xi_{c}^{\prime(+,0)},\Omega_c^0), Bcc=(Ξcc++,Ξcc+,Ωcc+){\bf B}_{cc}=(\Xi_{cc}^{++},\Xi_{cc}^+,\Omega_{cc}^+), or Bccc=Ωccc++{\bf B}_{ccc}=\Omega^{++}_{ccc}. With Bn(′){\bf B}_n^{(\prime)} denoted as the baryon octet (decuplet), we find that the Bc→Bn′ℓ+νℓ{\bf B}_{c}\to {\bf B}'_n\ell^+\nu_\ell decays are forbidden, while the Ωc0→Ω−ℓ+νℓ\Omega_c^0\to \Omega^-\ell^+\nu_\ell, Ωcc+→Ωc0ℓ+νℓ\Omega_{cc}^+\to\Omega_c^0\ell^+\nu_\ell, and Ωccc++→Ωcc+ℓ+νℓ\Omega_{ccc}^{++}\to \Omega_{cc}^+\ell^+\nu_\ell decays are the only existing Cabibbo-allowed modes for Bc′→Bn′ℓ+νℓ{\bf B}'_{c}\to {\bf B}'_n\ell^+\nu_\ell, Bcc→Bc′ℓ+νℓ{\bf B}_{cc}\to {\bf B}'_c\ell^+\nu_\ell, and Bccc→Bcc(′)ℓ+νℓ{\bf B}_{ccc}\to {\bf B}_{cc}^{(\prime)}\ell^+\nu_\ell, respectively. We predict the rarely studied Bc→Bn(′)M{\bf B}_{c}\to {\bf B}_n^{(\prime)}M decays, such as B(Ξc0→Λ0Kˉ0, Ξc+→Ξ0π+)=(8.3±0.9,8.0±4.1)×10−3{\cal B}(\Xi_c^0\to\Lambda^0\bar K^0,\,\Xi_c^+\to\Xi^0\pi^+)=(8.3\pm 0.9,8.0\pm 4.1)\times 10^{-3} and B(Λc+→Δ++π−, Ξc0→Ω−K+)=(5.5±1.3,4.8±0.5)×10−3{\cal B}(\Lambda_c^+\to \Delta^{++}\pi^-,\,\Xi_c^0\to\Omega^- K^+)=(5.5\pm 1.3,4.8\pm 0.5)\times 10^{-3}. For the observation, the doubly and triply charmed baryon decays of Ωcc+→Ξc+Kˉ0\Omega_{cc}^{+}\to \Xi_c^+\bar K^0, Ξcc++→(Ξc+π+\Xi_{cc}^{++}\to (\Xi_c^+\pi^+, Σc++Kˉ0)\Sigma_c^{++}\bar K^0), and Ωccc++→(Ξcc++Kˉ0,Ωcc+π+,Ξc+D+)\Omega_{ccc}^{++}\to (\Xi_{cc}^{++}\bar K^0,\Omega_{cc}^+\pi^+,\Xi_c^+ D^+) are the favored Cabibbo-allowed decays, which are accessible to the BESIII and LHCb experiments.Comment: 29 pages, no figure, a typo in the table correcte

    Manajemen Peningkatan Mutu Lulusan

    Get PDF
    This study aimed to describe management of graduates\u27 quality improvement in State Elementary School 2 Selangit Musi Rawas. The method of the study is qualitative descriptive. The subjects of the study are the principal, vice principal and teachers. The results of the study are: (1) Planning going well. (2) Organizing clearly visible in the division of duties of teachers and school programs. (3) Implementation, including: infrastructure, facilities that support learning, programs, curriculum and lesson plans. (4) Monitoring and evaluation is done technically by the school superintendent, principals and community
    • …
    corecore