Pair Production of the Doubly Charged Leptons via Electroweak Vector Boson Fusion at the Large Hadron Collider

Pair production of the doubly charged leptons X±± via vector boson fusion （γγ, Zγ and WW） at the large hadron collider is studied. Our numerical results show that the cross section via Zγ fusion is very small. For the center-of-mass energy √s= 14 TeV and Mx = 200 650 GeV, the values of the cross sections σγγ and σww are in the ranges of 5.2 fb-0.04 fb and 20.2 fb 1.2 fb, respectively.     

离子液体对淀粉酶催化反应的影响

用分光光度法研究了二烷基咪唑氯类和二烷基咪唑磷酸酯类离子液体对淀粉酶催化反应的影响,通过吸光度的变化来测定淀粉水解的程度。 结果表明,这两类离子液体对淀粉酶催化反应均有明显的抑制作用,其中1-己基-3-甲基咪唑氯[HMIM]Cl的抑制作用最大。 而且,对于相同的阴离子,随着阳离子咪唑环烷基取代基链长的增加,抑制作用也增加。