共查询到20条相似文献,搜索用时 31 毫秒
1.
运用Gaussian 03程序包中的单双迭代三重激发耦合簇理论和相关一致五重基优化了AsH2的基态结构,并在优化结构的基础上计算了它的离解能和振动频率. 结果表明:AsH2基态的平衡构型具有C2v对称性,键长RAs-H=01508 nm,键角∠HAsH=912231°,离解能De(HAs-H)=28795 eV,振动频率ν
关键词:
2')" href="#">AsH2
Murrell-Sorbie函数
多体项展式理论
解析势能函数 相似文献
2.
3.
Ying Li Juan Hua Kwei-Chou Yang 《The European Physical Journal C - Particles and Fields》2011,71(10):1775
The implications of the family non-universal Z′ model in the B→K
1(1270,1400)ℓ
+
ℓ
−(ℓ=e ,μ ,τ) decays are explored, where the mass eigenstates K
1(1270, 1400) are the mixtures of 1
P
1 and 3
P
1 states with the mixing angle θ. In this work, considering the Z′ boson and setting the mixing angle θ=(−34±13)○, we analyze the branching ratio, the dilepton invariant mass spectrum, the normalized forward–backward asymmetry and lepton
polarization asymmetries of each decay mode. We find that all observables of B→K
1(1270)μ
+
μ
− are sensitive to the Z′ contribution. Moreover, the observables of B→K
1(1400)μ
+
μ
− have a relatively strong θ-dependence; thus, the Z′ contribution will be buried by the uncertainty of the mixing angle θ. Furthermore, the zero crossing position in the FBA spectrum of B→K
1(1270)μ
+
μ
− at low dilepton mass will move to the positive direction with Z′ contribution. For the tau modes, the effects of Z′ are not remarkable due to the small phase space. These results could be tested in the running LHC-b experiment and Super-B
factory. 相似文献
4.
5.
R. Akers G. Alexander J. Allison K. J. Anderson S. Arcelli A. Astbury D. Axen G. Azuelos J. T. M. Baines A. H. Ball et al. 《Zeitschrift fur Physik C Particles and Fields》1994,61(2):199-208
We present measurements of the hadronic photon structure functionF
2
(x), in twoQ
2 ranges with mean values of 5.9 GeV2 and 14.7 GeV2. The data were taken by the OPAL experiment at LEP, with
close to theZ
0 mass and correspond to an integratede
+
e
– luminosity of 44.8 pb–1. In the context of a QCD-based model we find the quark transverse momentum cutoff separating the vector meson dominance (VMD) and perturbative QCD regions to be 0.27±0.10 GeV. We confirm that there is a significant pointlike component of the photon when the probe photon hasQ
2>4 GeV2. Our measurements extend to lower values ofx than any previous experiment, and no increase ofF
2
(x) is observed. 相似文献
6.
L. Cappiello O. Catà G. D’Ambrosio Dao-Neng Gao 《The European Physical Journal C - Particles and Fields》2012,72(1):1872
We study the decay K
+→π
+
π
0
e
+
e
−, currently under analysis by the NA62 Collaboration at CERN. In particular, we provide a detailed analysis of the Dalitz
plot for the long-distance, γ
∗-mediated, contributions (Bremsstrahlung, direct emission and its interference). We also examine a set of asymmetries to isolate
genuine short-distance effects. While we show that charge asymmetries are not required to test short distances, they provide
the best environment for its detection. This constitutes by itself a strong motivation for NA62 to study K
− decays in the future. We therefore provide a detailed study of different charge asymmetries and the corresponding estimated
signals. Whenever possible, we make contact with the related processes K
+→π
+
π
0
γ and K
L
→π
+
π
−
e
+
e
− and discuss the advantages of K
+→π
+
π
0
e
+
e
− over them. 相似文献
7.
D. Buskulic D. Decamp C. Goy J. -P. Lees M. -N. Minard B. Mours B. Pietrzyk R. Alemany F. Ariztizabal P. Comas et al. 《Zeitschrift fur Physik C Particles and Fields》1993,59(2):215-229
Contact interactions are searched for using the differential cross sections for the reactionse
+
e
–e
+
e
–,e
+
e
–µ
+
µ
–,e
+
e
–
+
– ande
+
e
– measured at 12 energies around theZ peak and corresponding to about 20 pb–1 of cumulated luminosity. Four-fermion contact term models assuming various chiralities of lepton currents are fitted to the lepton data and lower limits on the energy scale of such terms are set at 95% c.l. The limits vary in the range 0.9–4.7 TeV, depending on the model and on the lepton flavour. Theee contact terms are searched for assuming various chiralities. Limits on the energy scale between 79 and 130 GeV are extracted from the data. The results are compared and combined with those reported at lower energies.Deceased 相似文献
8.
A model-independent analysis of anomalous gauge coupling constants of W
± bosons is presented and the corresponding restrictions on them and on the electromagnetic characteristics of W
± bosons following from the experiments on measuring the e+ e- ? W+ W- ? ( e