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排序方式: 共有407条查询结果,搜索用时 15 毫秒
91.
92.
We compare Higgs boson production mechanisms at multi-TeV hadronic colliders. In addition to the previously investigated processes gluon + gluon → H and , we consider Higgs boson formation by pairs of virtual W's or Z's, a process analogous to two-photon collisions in e+e? scattering. The Higgs production process is dominated by longitudinal W's and is the most important mechanism for MH > 6 MW, if the top quark mass is about 30 GeV. 相似文献
93.
94.
95.
T. A. Armstrong M. Benayoun W. Beusch I. J. Bloodworth J. N. Carney R. Childs C. Evangelista B. R. French B. Ghidini M. Girone A. Jacholkowski J. Kahane J. B. Kinson A. Kirk K. Knudson V. Lenti Ph. Leruste A. Malamant J. L. Narjoux F. Navach A. Palano E. Quercigh N. Redaelli L. Rossi M. Sené R. Sené M. Stassinaki M. T. Trainor G. Vassiliadis O. Villalobos Baillie M. F. Votruba 《Zeitschrift fur Physik C Particles and Fields》1991,51(3):351-364
We have studied the andK
systems centrally produced in proton proton collisions at 300 GeV/c and +/p proton collisions at 85 GeV/c using the CERN spectrometer. Clear evidence forS
*/f
o(975) production is observed. An analysis performed on the + – mass spectrum in the 1.0 GeV region, using a coupled channel formalism, shows that it is possible to describe theS
*/f
o(975) effect with one single resonance once interference of theS
*/f
o(975) with theS-wave background is introduced. The resultingS
*/f
o(975) parameters arem
o
=979±4MeV,g
=0.28±0.04,g
K
=0.56±0.18 corresponding to a pole position on sheet II at (1001±2)–i(36±4) MeV. Evidence is also found for a structure having a mass of 1472±12 MeV and a width of 195±33 MeV. 相似文献
96.
T. A. Armstrong M. Benayoun W. Beusch I. J. Bloodworth J. N. Carney R. Childs B. R. French B. Ghidini A. Jacholkowski J. Kahane J. B. Kinson A. Kirk K. Knudson V. Lenti Ph. Leruste A. Malamant J. L. Narjoux F. Navach A. Palano E. Quercigh N. Redaelli L. Rossi M. Sené R. Sené M. Stassinaki M. T. Trainor G. Vassiliadis O. Villalobos Baillie M. F. Votruba G. Zito R. Zitoun WA Collaboration 《Zeitschrift fur Physik C Particles and Fields》1990,46(3):405-410
The reactionpp→p f (K + K -π+π-)p s , where theK + K ? π+π- system is centrally produced, has been studied at 300 GeV/c. TheK *0 \(K^{*0} \bar K^{*0} \) final state has been observed and the cross sections for its central production are found to be the same at 300 and 85 GeV/c. TheK *0 \(K^{*0} \bar K^{*0} \) final state appears to be produced as a non-resonant threshold enhancement. 相似文献
97.
Swanson SA McClain R Lovejoy KS Alamdari NB Hamilton JS Scott JC 《Langmuir : the ACS journal of surfaces and colloids》2005,21(11):5034-5039
Self-assembled monolayers (SAMs) of the aromatic diisocyanides, 1,4-phenylenediisocyanide, 2,3,5,6-tetramethyl-1,4-phenylenediisocyanide, 4,4'-biphenyldiisocyanide, 3,3',5,5'-tetramethyl-4,4'-biphenyldiisocyanide, and 4,4' '-p-terphenyldiisocyanide, were prepared on gold and palladium surfaces. The SAMs were characterized by ellipsometry, polarization-modulated infrared reflection-absorption spectroscopy (PM-IRRAS), and grazing-angle attenuated total reflectance infrared spectroscopy (GATR). Based on the position of the metal-coordinated isocyanide stretching band, the SAMs on gold were found to bind in the terminal (eta(1)) geometry, while the SAMs on palladium prefer a different geometry which is possibly a triply bridging (mu(3)-eta(1)) geometry. A side-reaction of the unbound isocyanide in the SAM was identified as oxidation to an isocyanate group. 相似文献
98.
β-Alkoxyalkylmercury(II) acetates have been symmetrised in situ with alkaline sodium stannite to afford good yields of bis(β-alkoxyalkyl)mercurials, [R1R2C(OR)CHR3]2 Hg. 相似文献
99.
J. Amirzadeh M. Baubillier I.J. Bloodworth G.J. Bossen A. Burns J.N. Carney C.A. Cowan G.F. Cox C.J. De Lima U. Dore Ph. Gavillet J.B. Kinson K. Knudson F. Levy H. McCann J.M. MacDermott P.J. Negus B.Y. Oh R. Zitoun 《Physics letters. [Part B]》1980,90(3):324-326
We observe production of a Ξ*(2370) in the reactions K?p→K, Kπ and [ΩK] (K or Kπ) at 8.25 GeV/c in a high statistics bubble chamber experiment. The mass and width are determined to be 2373 ± 8 MeV and 80 ± 25 MeV, respectively. The I = 1/2 assignment is strongly favoured. 相似文献
100.