We calculate the contributions to the rare B-decays,B→Xs,d vv and Bs,d→l+l-from the unit-charged technipions.Within the considered parameter space we find that:(a)the enhancements to the branching ratios in question...We calculate the contributions to the rare B-decays,B→Xs,d vv and Bs,d→l+l-from the unit-charged technipions.Within the considered parameter space we find that:(a)the enhancements to the branching ratios in question can be as large as three orders of magnitude;(b)the ALEPH data of B→Xsvv lead to strong mass bounds on mpl and mp8:mp8≥620,475 GeV for FQ=40 GeV and mpl=100,400 GeV,respectively;(c)the CDF data of Bs→μμlead to a relatively weak limit:mp8≥320 GeV for FQ=40 GeV and mpl=200 GeV.展开更多
We investigate the influence of correlation between water molecules transport through the neighbouring nanopores, whose centres are at a distance of only 6.2A, using the molecular dynamics simulations. Water molecule ...We investigate the influence of correlation between water molecules transport through the neighbouring nanopores, whose centres are at a distance of only 6.2A, using the molecular dynamics simulations. Water molecule distribution in nanopore and average water flow are obtained. It is found that the average water molecule number and water flow are slightly different between a system made of the neighbouring nanopores and a system of a single pore. This indicates that transport of water chains in neighbouring pores do no show significant influence each other. These findings should be helpful in designing efficient artificial membrane made of nanopores and providing an insight into effects of the biological channel structure on the water permeation.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No.19575015the Sino-British Friendship Scholarship Scheme。
文摘We calculate the contributions to the rare B-decays,B→Xs,d vv and Bs,d→l+l-from the unit-charged technipions.Within the considered parameter space we find that:(a)the enhancements to the branching ratios in question can be as large as three orders of magnitude;(b)the ALEPH data of B→Xsvv lead to strong mass bounds on mpl and mp8:mp8≥620,475 GeV for FQ=40 GeV and mpl=100,400 GeV,respectively;(c)the CDF data of Bs→μμlead to a relatively weak limit:mp8≥320 GeV for FQ=40 GeV and mpl=200 GeV.
基金Supported by Chinese Academy of Sciences, the National Natural Science Foundation of China under Grant Nos 10674146, 10604060 and 10825520, and Shanghai Supercomputer Center of China.We thank Professor Hu Jun for the suggestion of this work, and Wang Chunlei and Xiu Peng for helpful discussion and comments.
文摘We investigate the influence of correlation between water molecules transport through the neighbouring nanopores, whose centres are at a distance of only 6.2A, using the molecular dynamics simulations. Water molecule distribution in nanopore and average water flow are obtained. It is found that the average water molecule number and water flow are slightly different between a system made of the neighbouring nanopores and a system of a single pore. This indicates that transport of water chains in neighbouring pores do no show significant influence each other. These findings should be helpful in designing efficient artificial membrane made of nanopores and providing an insight into effects of the biological channel structure on the water permeation.
