منابع مشابه
Quantum momentum distribution and kinetic energy in solid 4He.
We present measurements of neutron scattering from solid 4He at high momentum transfer. The solid is held close to the melting line at molar volume 20.87 cm3/mol and temperature T=1.6 K. From the data, we determine the shape of the momentum distribution, n(k), of atoms in the solid and the leading final state contribution to the scattering. We show that n(k) in this highly anharmonic, quantum s...
متن کاملPerturbative Corrections to a Sum Rule for the Heavy Quark Kinetic Energy
We calculate the perturbative corrections to order αsβ0 to the sum rule derived from the second moment of the time-ordered product of b → c currents near zero recoil. This sum rule yields a bound on λ1, the expectation value of the b quark kinetic energy operator inside the B meson. The perturbative corrections significantly weaken the bound relative to the tree level result, yielding λ1 < −0.1...
متن کاملQCD Sum-Rule Calculation of the Kinetic Energy and Chromo-Interaction of Heavy Quarks Inside Mesons
We present a QCD sum-rule determination of the heavy-quark kinetic energy inside a heavy meson, −λ1/2mQ, which is consistent with the fieldtheory analog of the virial theorem. We obtain −λ1 ≈ (0.10± 0.05) GeV, significantly smaller than a previous sum-rule result, but in good agreement with recent determinations from the analysis of inclusive decays. We also present a new determination of the c...
متن کاملRole of Kinetic Energy
Peak systolic pulmonary valvar pressure gradients are frequently seen in large intracardiac left-to-right shunt lesions. Conventionally, this has been attributed to "relative" pulmonic stenosis. Theoretical considerations suggest that this gradient is due to differences in expression of the total fluid energy. The side pressure, the downstream pressure, the end pressure, and the flow velocity i...
متن کاملA Method for Ion Distribution Function Evaluation Using Escaping Neutral Atom Kinetic Energy Samples
A reliable method to evaluate the probability density function for escaping atom kinetic energies is required for the analysis of neutral particle diagnostic data used to study the fast ion distribution function in fusion plasmas. Digital processing of solid state detector signals is proposed in this paper as an improvement of the simple histogram approach. Probability density function for kine...
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ژورنال
عنوان ژورنال: Transactions of the Japan Society of Civil Engineers
سال: 1956
ISSN: 1884-4944,0047-1798
DOI: 10.2208/jscej1949.1956.23