نتایج جستجو برای: inelastic

تعداد نتایج: 13648  

1995
G. Mennitto Martin Buehler

We introduce new compliance models for LADD transmissions which reduce, by an order of magnitude, inelastic model errors of up to 18% full scale over force and position operating ranges. Elastic models introduced so far were all based on ber elasticity, which show an increase in LADD length from the inelastic length with force. We show that in experiments the opposite is true. The LADD is alway...

2003
B. Z. Kopeliovich

The current normalization of the cross section of inclusive high-p T particle production in deuteron-gold collisions measured at RHIC relies on Glauber model calculations for the inelastic dAu cross section. These calculations should be corrected for diffrac-tion. Moreover, they miss the Gribov's inelastic shadowing which makes nuclei more transparent (color transparency) and reduce the inelast...

2001
E. Pace G. Salmè S. Scopetta A. Kievsky

The possibility of a reliable extraction of the neutron deep inelastic structure function , F n 2 (x), for x < 0.85 from joint measurements of deep inelastic structure functions of deuteron, 3 He and 3 H is investigated. The model dependence in this extraction, linked to the possible different interactions between nucleons in nuclei, is shown to be weak, if the nuclear structure effects are pro...

2007
T. Andeen B. C. K. Casey K. DeVaughan Y. Enari E. Gallas D. Krop R. Partridge H. Schellman G. R. Snow S. Yacoob H. D. Yoo

An essential ingredient in all cross section measurements is the luminosity used to normalize the data sample. In this note, we present the final assessment of the integrated luminosity recorded by the DØ experiment during Tevatron Run IIa. The luminosity measurement is derived from hit rates from the products of inelastic proton-antiproton collisions registered in two arrays of scintillation c...

Journal: :Physical review letters 2006
N Zahzam T Vogt M Mudrich D Comparat P Pillet

Cold inelastic collisions between confined cesium (Cs) atoms and Cs2 molecules are investigated inside a CO2 laser dipole trap. Inelastic atom-molecule collisions can be observed and measured with a rate coefficient of approximately 2.6 x 10(-11) cm3 s(-1), mainly independent of the molecular rovibrational state populated. Lifetimes of purely atomic and molecular samples are essentially limited...

Journal: :Physical review letters 2008
Z Li S V Alyabyshev R V Krems

We show that cross sections for inelastic collisions of ultracold atoms or molecules confined by a harmonic potential have the same energy dependence as in pure 2D geometry. This indicates that chemical reactions and inelastic collisions may be suppressed in an ultracold gas under strong confinement in one dimension. We present a numerical proof of the threshold collision laws in 2D. Our result...

Journal: :Science 1998
Fujisawa Oosterkamp van der Wiel WG Broer Aguado Tarucha Kouwenhoven

A double quantum dot device is a tunable two-level system for electronic energy states. A dc electron current was used to directly measure the rates for elastic and inelastic transitions between the two levels. For inelastic transitions, energy is exchanged with bosonic degrees of freedom in the environment. The inelastic transition rates are well described by the Einstein coefficients, relatin...

2008
Giovanni Falcone

The bare-dressed technique is, for the first time, used in collision theory. The approach is valid for classical as well for quantum binary elastic collisions in the non relativistic regime. The same formalism can be used for inelastic collisions, when the particles undergo only a change of their internal quantum states during the collision process. All kinematic results can be obtained by a si...

1992
S. G. Naculich P. Yuan

In a recent paper, Chivukula and Golden claimed that the electroweak symmetry– breaking sector could be hidden if there were many inelastic channels in the longitudinal W W scattering process. They presented a model in which the W 's couple to pseudo–Goldstone bosons, which may be difficult to detect experimentally. Because of these inelastic channels, the W W interactions do not become strong ...

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