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We calculated the Pseudo-Goldstone bosons (technipions, top-pious) corrections to the cross-section a of the process e+e-→bs in topcolor-assisted multiscale technicolor model at LEP Ⅱ energy region. Our results show that, with reasonable value of the parameters, the cross-section is one order larger than that predicted by the standard model. We discussed the possibility of detecting this rare event at the B-factoly. 相似文献
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YingTang Zhang ChunChang Wang WeiBin Liu Zhong Wang HuiBin Lu ZiYu Chen 《中国科学G辑(英文版)》2009,52(12):1893-1897
A series of samples of La1−x
Tb
x
MnO3 (0⩽x⩽0.15) are prepared. The static and dynamic magnetizations of La1−x
Tb
x
MnO3 have been investigated. The results indicate that the spins with the short-range order are frozen into random direction at
low enough temperatures which leads to the samples exhibiting the spin-glass like behavior. It is considered that the spin-glass
like behavior originates from the competition between ferromagnetic double exchange among Mn3+ and Mn2+ and antiferromagnetic superexchange among Mn3+ and Mn3+, as well as Tb3+ and Tb3+. 相似文献
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Wang Sheng An YuWen Fang ShouXian Huang Nan Liu WeiBin Liu YuDong Qin Qing Qiu Jing Wang Na Xu Gang Xu ShouYan Yu ChengHui 《中国科学:物理学 力学 天文学(英文版)》2011,54(2):239-244
The China Spallation Neutron Source (CSNS) is the first accelerator-based pulsed neutron source in China. Its accelerators are made up of an 80 MeV H− linac, a Rapid Cycling Synchrotron (RCS) and two beam transport lines. RCS accumulates and accelerates protons to the design energy of 1.6 GeV, and extracts high energy beam to strike the target. The overview of RCS is presented, and the key problems of the physics design are discussed. The two beam transport lines, from linac to RCS and from RCS to the target, are also introduced.
相似文献4.
The photodissociation of ethyl iodide at 279.71, 281.73, 304.02 and 304.67 nm has been studied on our new mini-photofragment translational spectrometer with a total flight path of only 5 cm. Some vibrational peaks are firstly resolved in the TOF spectra of I*(2P1/2) and I(2P3/2) channels. These vibrational peaks are assigned to the excitation states (v2 = 0, 1, 2,…) of the umbrella mode (v2, 540 cm-1) of the photofragment C2H5, and the distribution of the vibrational states is obtained. The dissociation energy has been determined to be D0(C-I)=2.314 ±0.03 eV. The energy partitioning of the available energy (Eavl=ET Eint=ET EV,R) calculated from our experimental data (-E)int/Eavl= 22.1% at 281.73 nm, 22.4% at 304.02 nm for the I* channel, and (-E)int/Eavl = 25.2% at 279.71 nm, 25.9% at 304.67 nm for the I channel, seem to be more reliable. 相似文献
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