(2.1), the transition amplitudes for the production 2Note that in the s-channel scenario m ˚ < m ˜ is possible, since ˚is always allowed to decay into neutrinos, meaning that it can never be a viable DM candidate. Available software includes: Mathematica 9 (with FeynArts-3.8, FeynCalc-8. They run 64-bit CentOS 6.4 (Red Hat Linux 6.4). In the case of t-channel annhilations according to eq. Both Romulus and Remus have 16 GB of RAM and 8 CPUs. 表示的构造: processes can be calculated with FeynCalc or Package-X. Gordon 恒等式: 这个稍微难点儿, 下面给出证明: 已知 Dirac 方程与旋量场展开式: 取正能解有 先计算, 证毕. Heres an example problem from an online course Im taking: Recalling that a,a 1, calculate the commutator: a is an annihilation operator and a dagger is a creation operator.
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