排序方式: 共有11条查询结果,搜索用时 140 毫秒
1.
Weir AJ Klein SR Abrams G Adolphsen CE Akerlof C Alexander JP Alvarez M Amidei D Baden AR Ballam J Barish BC Barklow T Barnett BA Bartelt J Blockus D Bonvicini G Boyarski A Boyer J Brabson B Breakstone A Brom JM Bulos F Burchat PR Burke DL Butler F Calvino F Cence RJ Chapman J Cords D Coupal DP DeStaebler HC Dorfan DE Dorfan JM Drell PS Feldman GJ Fernandez E Field RC Ford WT Fordham C Frey R Fujino D Gan KK Gidal G Gladney L Glanzman T Gold MS Goldhaber G Green A Grosse-Wiesmann P Haggerty J 《Physical review D: Particles and fields》1990,41(5):1384-1388
2.
T. Eichten H. Deden F.J. Hasert W. Krenz J. Von Krogh D. Lanske J. Morfin H. Weerts G. Bertrand-Coremans J. Sacton W. Van Doninck P. Vilain D.C. Cundy D. Haidt M. Jaffre G. Kalbfleisch S. Natali P. Musset J.L. Pinfold 《Physics letters. [Part B]》1973,46(2):281-284
The total cross-sections for -nucleon scattering have been measured. A test has been made of the muon number conservation law. A limit of 2.4 GeV is found the mass of the “Georgi-Glashow type” heavy lepton 相似文献
3.
W. Lerche M. Pohl M. Dewitt C. Vander Velde-Wilquet P. Vilain D. Haidt C. Matteuzzi J.B.M. Pattison B. Degrange T. Francois P. Van Dam M. Jaffre C. Longuemare C. Pascaud S. Ciampolillo F. Mattioli A. Sconza 《Physics letters. [Part B]》1978,78(4):510-514
A sample of 357 events fitting the reaction ν + p → μ? + p + π+ on free proton is obtained from the Gargamelle neutrino propane experiment at the CERN-PS. The average value of the cross section above 1 GeV is found to be (0.60 ± 0.07) 10?38 cm2. The reaction is dominated by the production of the Δ++(1232) resonance. Results on the Δ++ spin density matrix are given. 相似文献
4.
Gomez-Cadenas JJ Heusch CA Abrams G Adolphsen CE Akerlof C Alexander JP Alvarez M Amidei D Baden AR Ballam J Barish BC Barklow T Barnett BA Bartelt J Blockus D Bonvicini G Boyarski A Boyer J Brabson B Breakstone A Brom JM Bulos F Burchat PR Burke DL Butler F Calvino F Cence RJ Chapman J Cords D Coupal DP DeStaebler HC Dorfan DE Dorfan JM Drell PS Feldman GJ Fernandez E Field RC Ford WT Fordham C Frey R Fujino D Gan KK Gidal G Gladney L Glanzman T Gold MS Goldhaber G Golding L Green A 《Physical review letters》1991,67(8):1007-1010
5.
S. Ciampolillo B. Degrange M. Dewit T. François D. Haidt M. Jaffre C. Longuemare C. Matteuzzi F. Mattioli J.B.M. Pattison M. Pohl C. Vander Velde Wilquet P. Vilain H.W. Wachsmuth 《Physics letters. [Part B]》1979,84(2):281-284
Average total cross sections are given for neutrino charged current interactions at neutrino energies of 2.87 GeV and 9.05 GeV. The ratios in units of 10?38 cm2/GeV nucleon, respectively The errors include both statistical and systematic uncertainties. 相似文献
6.
F.J. Hasert H. Faissner W. Krenz J. Von Krogh D. Lanske J. Morfin K. Schultze H. Weerts G.H. Bertrand-Coremans J. Lemonne J. Sacton W. Van Doninck P. Vilain C. Baltay D.C. Cundy D. Haidt M. Jaffre P. Musset W.G. Scott 《Physics letters. [Part B]》1973,46(1):121-124
One possible event of the process ν?μ + e? → v?μ + e? has been observed. The various background processes are discussed and the event interpreted in terms of the Weinberg theory. The 90% confidence limits on the Weinberg parameter are 0.1 < sin2θW < 0.6. 相似文献
7.
When transport is advection-dominated, classical numerical methods introduce excessive artificial diffusion and spurious oscillations. Special methods are required to overcome these phenomena. To solve the advection‒diffusion equation, a numerical method is developed using a discontinuous finite element method for the discretization of the advective terms. At the discontinuities of the approximate solution, numerical advective fluxes are calculated using one-dimensional approximate Riemann solvers. The method is stabilized with a multidimensional slope limiter which introduces small amounts of numerical diffusion when sharp concentration fronts occur. In addition, the diffusive term is discretized using a mixed hybrid finite element method. With this approach, numerical oscillations are completely avoided for a full range of cell Peclet numbers. The combination of discontinuous and mixed finite elements can be easily applied to 2D and 3D models using various types of elements in regular and irregular meshes. Numerical tests show good agreement with 1D and 2D analytical solutions. This approach is compared at the same time with two different numerical methods, a standard mixed finite method and a finite volume approach with high-resolution upwind terms. Regular and irregular meshes are used for the numerical tests to study the mesh effects on the numerical results. Our data show that in all cases this approach performs well. © 1997 by John Wiley & Sons, Ltd. 相似文献
8.
T. Eichten H. Faissner F.J. Hasert S. Kabe W. Krenz J. Von Krogh J. Morfin K. Schultze G.H. Bertrand-Coremans J. Sacton W. Van Doninck P. Vilain D.C. Cundy D. Haidt M. Jaffre S. Natali P. Musset J.B.M. Pattison W.G. Scott 《Physics letters. [Part B]》1973,46(2):274-280
The v and nucleon total cross-sections have been determined as a function of energy using a sample of 2500 v and 950 event. The results are compared with predictions of scaling and charge symmetry hypotheses. 相似文献
9.
H. Deden F.J. Hasert W. Krenz J. Von Krogh D. Lanske J. Morfin K. Schultze H. Weerts G.H. Bertrand-Coremans J. Sacton W. Van Doninck P. Vilain D.C. Cundy D. Haidt M. Jaffre S. Natali J.B.M. Pattison W.G. Scott 《Nuclear Physics B》1975,85(2):269-288
High-energy exclusive and inclusive cross sections are discussed in terms of their dependence on the transverse-position variables (impact parameters) of incident and outgoing particles. The objective is to clarify the points of conflict and agreement of various models with each other and with intuitive ideas based on macroscopic collisions. First the impact parameter representation of states and amplitudes is reviewed. New impact parameter conservation laws and sum rules are derived from Lorentz invariance. The generalized optical theorem of Mueller is extended to give the impact parameter distribution of produced particles. Mueller-Regge behaviour is shown to imply three-dimensional limiting fragmentation in (impact parameter, rapidity)- space and a specific linear structure of the final-state particle density in the central region of this space. The predictions of weak- and strong-coupling multiperipheral models, the φ3 ladder eikonal model and the dual resonance model are presented, with emphasis on the dependence of average multiplicity on impact parameter and the dependence of mean square impact parameter on multiplicity. Special techniques for strong-coupling multiperipheral models are used to study the breakdown of the random-walk impact-parameter structure of the weak-coupling case, and to show explicitly that the average multiplicity is a decreasing function of impact parameter in the strongly coupled ABFST model. 相似文献
10.
Adsorption of Pesticides onto Granular Activated Carbon: Determination of Surface Diffusivities Using Simple Batch Experiments 总被引:1,自引:0,他引:1
The Homogeneous Surface Diffusion Model (HSDM) has been successfully used to predict the adsorption kinetics for several chemicals inside batch adsorber vessels. In addition to the adsorption equilibrium, this model is based on external mass transfer and surface diffusion. This paper presents the determination of the surface diffusion coefficient (D
s) using a differential column batch reactor (DCBR). The adsorption kinetics for three pesticides onto granular activated carbon have been established experimentally. Their corresponding three diffusion coefficients were determined by fitting the computer simulations to the experimental concentration-time data. The results show that this original apparatus increases by an order of magnitude the range of reachable diffusion coefficient compared to perfectly mixed contactors. Moreover the computed D
s values are more accurate because of the better assessment of the external mass transfer coefficient (k
f) for fixed beds. 相似文献