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排序方式: 共有392条查询结果,搜索用时 210 毫秒
91.
Abazov VM Abbott B Acharya BS Adams M Adams T Alexeev GD Alkhazov G Alton A Alverson G Aoki M Askew A Åsman B Atkins S Atramentov O Augsten K Avila C BackusMayes J Badaud F Bagby L Baldin B Bandurin DV Banerjee S Barberis E Baringer P Barreto J Bartlett JF Bassler U Bazterra V Bean A Begalli M Belanger-Champagne C Bellantoni L Beri SB Bernardi G Bernhard R Bertram I Besançon M Beuselinck R Bezzubov VA Bhat PC Bhatia S Bhatnagar V Blazey G Blessing S Bloom K Boehnlein A Boline D Boos EE 《Physical review letters》2012,108(13):131802
We present a search for Kaluza-Klein (KK) particles predicted by models with universal extra dimensions (UED) using a data set corresponding to an integrated luminosity of 7.3 fb(-1), collected by the D0 detector at a pp center-of-mass energy of 1.96 TeV. The decay chain of KK particles can lead to a final state with two muons of the same charge. This signature is used to set a lower limit on the compactification scale of R(-1)>260 GeV in a minimal UED model. 相似文献
92.
Abazov VM Abbott B Acharya BS Adams M Adams T Alexeev GD Alkhazov G Alton A Alverson G Aoki M Askew A Åsman B Atkins S Atramentov O Augsten K Avila C Badaud F Bagby L Baldin B Bandurin DV Banerjee S Barberis E Baringer P Barreto J Bartlett JF Bassler U Bazterra V Bean A Begalli M Belanger-Champagne C Bellantoni L Beri SB Bernardi G Bernhard R Bertram I Besançon M Beuselinck R Bezzubov VA Bhat PC Bhatia S Bhatnagar V Blazey G Blessing S Bloom K Boehnlein A Boline D Boos EE Borissov G Bose T 《Physical review letters》2012,108(15):151804
We present a measurement of the W boson mass using data corresponding to 4.3 fb(-1) of integrated luminosity collected with the D0 detector during Run II at the Fermilab Tevatron pp collider. With a sample of 1,677,394 W → eν candidate events, we measure M(W) = 80.367 ± 0.026 GeV. This result is combined with an earlier D0 result determined using an independent Run II data sample, corresponding to 1 fb(-1) of integrated luminosity, to yield M(W) = 80.375 ± 0.023 GeV. 相似文献
93.
94.
Hossein A. Baghdadi Elizabeth C. Jensen Nalini Easwar Surita R. Bhatia 《Rheologica Acta》2008,47(2):121-127
We observe evidence of re-entrant behavior in dispersions of a discotic clay, laponite, with added polymer. Under basic conditions,
neat laponite forms a disordered colloidal glass. Rheologically, this phase behaves as a viscoelastic solid, and dynamic light
scattering shows evidence of non-ergodic behavior. Addition of low molecular weight poly(ethylene oxide) (PEO) melts the glass,
resulting in a low-viscosity liquid with fast dynamics. We believe this is due to a depletion force caused by excess PEO chains
in solution. A viscoelastic solid is re-formed with the addition of high molecular weight PEO, which we believe to be caused
by polymer chains bridging between laponite particles. The physics in our system is quite different from the hard sphere/nonadsorbing
polymer systems for which re-entrant glass transitions have been reported in the literature; however, we believe there may
be similarities between these phenomena. To our knowledge, this is the first evidence of a type of re-entrant behavior in
anisotropic colloids. 相似文献
95.
Subhash Bhatia Noor Asmawati binti Mohd Zabidi Megat Harun Al Rashid bin Megat Ahmad 《Reaction Kinetics and Catalysis Letters》2001,74(1):87-92
The catalytic activity of Ni/MgO catalysts was studied for the oxidative coupling of methane (OCM). The catalysts were characterized
using transmission electron microscope (TEM) and XRD. The increase in C2+ selectivity of Ni/MgO was attributed to the presence
of bulk dislocations and MgNiO2 phase.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献
96.
Positive Definite Functions and Operator Inequalities 总被引:1,自引:0,他引:1
We construct several examples of positive definite functions,and use the positive definite matrices arising from them toderive several inequalities for norms of operators. 1991 MathematicsSubject Classification 42A82, 47A63, 15A45, 15A60. 相似文献
97.
Some new operator versions of the Schwarz inequality are obtained. One of them is a counterpart of the variance-covariance
inequality in the context of noncommutative probability.
Received: 14 April 2000 / Accepted: 10 May 2000 相似文献
98.
M. Marafi J. Kokaj K.S. Bhatia Y. Makdisi K. Mathew 《Optics and Lasers in Engineering》2007,45(1):191-197
Laser spectroscopic study of billary calculi and tissues is described. Fluorescence spectra of human gallbladder stones, bile and tissues were recorded with streak camera in the frequency and time domain. Potential of fluorescence as a diagnostic tool to discriminate between the intended target and the surrounding tissues and bile is evaluated. Initiation of fragmentation process is visualized by high-speed shadowgraphy, interferometry performed during the laser impact and generation of plasma causing growth and collapse of bubbles. 相似文献
99.
Eigenvalues of symmetrizable matrices 总被引:3,自引:0,他引:3
New perturbation theorems for matrices similar to Hermitian matrices are proved for a class of unitarily invariant norms calledQ-norms. These theorems improve known results in certain circumstances and extend Lu's theorems for the spectral norm, see
[Numerical Mathematics: a Journal of Chinese Universities, 16 (1994), pp. 177–185] toQ-norms.
This material is based in part upon the third author's work supported from August 1995 to December 1997 by a Householder Fellowship
in Scientific Computing at Oak Ridge National Laboratory, supported by the Applied Mathematical Sciences Research Program,
Office of Energy Research, United States Department of Energy contract DE-AC05-96OR22464 with Lockheed Martin Energy Research
Corp. 相似文献
100.