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11.
12.
Mattson M Alkhazov G Atamantchouk AG Balatz MY Bondar NF Cooper PS Dauwe LJ Davidenko GV Dersch U Dolgolenko AG Dzyubenko GB Edelstein R Emediato L Endler AM Engelfried J Eschrich I Escobar CO Evdokimov AV Filimonov IS Garcia FG Gaspero M Giller I Golovtsov VL Gouffon P Gülmez E Kangling H Iori M Jun SY Kaya M Kilmer J Kim VT Kochenda LM Konorov I Kozhevnikov AP Krivshich AG Krüger H Kubantsev MA Kubarovsky VP Kulyavtsev AI Kuropatkin NP Kurshetsov VF Kushnirenko A Kwan S Lach J Lamberto A 《Physical review letters》2002,89(11):112001
We observe a signal for the doubly charmed baryon Xi(+)(cc) in the charged decay mode Xi(+)(cc)-->Lambda(+)(c)K-pi(+) in data from SELEX, the charm hadroproduction experiment at Fermilab. We observe an excess of 15.9 events over an expected background of 6.1+/-0.5 events, a statistical significance of 6.3sigma. The observed mass of this state is 3519+/-1 MeV/c(2). The Gaussian mass width of this state is 3 MeV/c(2), consistent with resolution; its lifetime is less than 33 fs at 90% confidence. 相似文献
13.
Richard E. Neapolitan Warren S. Edelstein 《Zeitschrift für Angewandte Mathematik und Physik (ZAMP)》1973,24(6):823-837
Summary For a viscoelastic beam loaded at one end and otherwise traction-free, it is shown that a certain integral measure of the strain in that portion of the beam at a distance greater than or equal tos decays exponentially with increasings. This is a different integral decay estimate from that obtained previously by Edelstein [2] and leads immediately to a pointwise decay estimate for strains.
Submitted by R.E.N. as a partial fulfillment of the requirements for the Ph.D. degree at Illinois Institute of Technology, Chicago, Illinois 60616. 相似文献
Zusammenfassung Für einen viskoelastischen Balken, der am einen Ende belastet ist, wird gezeigt, dass ein gewisses Integralmass der Verzerrung in Entfernungen, die grösser oder gleichs sind, mit zunehmendems exponentiell abnimmt. Es handelt sich dabei um eine andere Integral-Abschätzung, als sie früher von Edelstein [2] aufgestellt wurde. Sie führt direkt zu einer punktweisen Abschätzung für die Verzerrungen.
Submitted by R.E.N. as a partial fulfillment of the requirements for the Ph.D. degree at Illinois Institute of Technology, Chicago, Illinois 60616. 相似文献
14.
15.
In subnormal glow discharge under d.c. excitation at different pressure in a varying transverse magnetic field (0 to 30 G)
some measurements have been carried out for various initial average tube currents. The voltage across the discharge increases
and average tube current and residual current decreases in the magnetic field. With the help of Beckman’s expression [4] for
the axial field and the electron density distribution in a transverse magnetic field the observed variation of current and
voltage can be satisfactorily explained. The variation of axial electric field with transverse magnetic field can be represented
to a fair degree of accuracy by the derived equation. The behaviour of residual current with magnetic field has been observed
in these oscillations. 相似文献
16.
Jos D. Edelstein 《Physics letters. [Part B]》1997,390(1-4)
We study the cosmological constant problem in a three-dimensional N = 2 supergravity theory with gauge groupSU (2)global × U(1)local. The model we consider is known to admit string-like configurations, the so-called semi-local cosmic strings. We show that the stability of these solitonic solutions is provided by supersymmetry through the existence of a lower bound for the energy, even though the manifold of the Higgs vacuum does not contain non-contractible loops. Charged Killing spinors do exist over configurations that saturate the Bogomol'nyi bound, as a consequence of an Aharonov-Bohm-like effect. Nevertheless, there are no physical fermionic zero modes on these backgrounds. The exact vanishing of the cosmological constant does not imply, then, Bose-Fermi degeneracy. This provides a non-trivial example of the recent claim made by Witten on the vanishing of the cosmological constant in three dimensions without unphysical degeneracies. 相似文献
17.
A.S. Edelstein S.R. Ovshinsky H. Sadate-Akhavi J. Wood 《Solid State Communications》1982,41(2):139-142
Measurements on amorphous Mo1?xSix (0.27 ≤ × ≤ 0.77) show that with increasing x the superconducting transition temperature, Tc, decreases linearly with x for x ≤ x0 ≡ 0.63 ± 0.05. The superconducting transition width and normal state resistivity increase rapidly with increasing x as x approaches x0. For x > x0, Tc drops below 1.5K. Transmission electron diffraction measurements (0.65 ≤ × ≤ 0.75) detect the presence of a second amorphous phase which resembles a-Si only for samples with x ? 0.75. The behavior near x0 could be attributed to the onset of an electronic transition involving the conversion of metallically bonded Si to covalently bonded Si. 相似文献
18.
19.
Warren S. Edelstein 《International Journal of Solids and Structures》1977,13(6):599-601
Uniqueness is established for positive solutions of a nonlinear integral equation which governs the effective stress in internally loaded spherical and incompressible cylindrical pressure vessels subject to primary or secondary transient creep. 相似文献
20.
A.S. Edelstein C.J. Tranchita O.D. McMasters K.A. Gschneidner 《Solid State Communications》1974,15(1):81-85
Susceptibility measurements on CeAl3 down to 0.5 K show both the absence of magnetic ordering and a reduced effective moment such as found in dilute Kondo alloys. The resistance decreases a factor of 30 below the maximum at T = 37 K and the magneto resistance which is negative above 0.5 K apparently becomes positive for T < 0.5 K. 相似文献