排序方式: 共有18条查询结果,搜索用时 359 毫秒
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《Physics letters. [Part B]》2001,511(1):77-84
We study the contribution of a generic charged Higgs (H+) to the muon anomalous magnetic moment aμ with the SUSY soft breaking parameters. We find out that the deviation between the experimental data and the predicted SM value on aμ can be explained by the two-loop charged Higgs diagrams even with mH+∼400 GeV. 相似文献
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《Physics letters. A》1999,251(1):79-85
We present a way to construct and solve the small-polaron model with general open boundary conditions. The Bethe ansatz equations and the energy spectrum are obtained. It is found that the Grassmann numbers play a crucial role in the construction of the Hamiltonian as well as the reflection equations for the model. The way presented is applicable for some other fermion models. 相似文献
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切贝舍夫是俄国十九世纪最伟大的数学家之一,他第一个主张概率论的极限定理应该严格的证明,并尽可能精确地确定偏离极限的估计量,这在方法论上引起了很大变化.其创立的切贝舍夫不等式和切贝舍夫大数定律是概率论极限理论的基础,从而使概率论成为严密数学分支.切贝舍夫的概率思想是在一定数学文化背景产生的,尤其是法国数学文化对其发展的形成有着深刻影响. 相似文献
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《Nuclear Physics B》2006,750(3):111-141
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《Physics letters. [Part B]》1999,456(1):77-79
Calculation of initial state radiation (ISR) in the fitting program MIZA and in the Standard Model program BHM is improved within the analysis of the Z line-shape measurements at LEP. The uncertainty on the determination of the Z line-shape parameters coming from the precision of ISR calculations is 2×10−4 on σ0 and 0.1 MeV on mZ and ΓZ. 相似文献
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《Physics letters. [Part B]》1999,461(4):387-396
The Alpha Magnetic Spectrometer (AMS) was flown on the space shuttle Discovery during flight STS-91 in a 51.7° orbit at altitudes between 320 and 390 km. A total of 2.86×106 helium nuclei were observed in the rigidity range 1 to 140 GV. No antihelium nuclei were detected at any rigidity. An upper limit on the flux ratio of antihelium to helium of <1.1×10−6 is obtained. 相似文献
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This paper traces the ebbs and flows of the history of geometry at Cambridge from the time of Cayley to 1940, and therefore the arrival of a branch of modern mathematics in Great Britain. Cayley had little immediate influence, but projective geometry blossomed and then declined during the reign of H.F. Baker, and was revived by Hodge at the end of the period. We also consider the implications these developments have for the concept of a school in the history of mathematics. 相似文献
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