Total σ : Cross sections

pythia8~8.180--1sherpa~1.2.2pArray
(
    [0] => pythia8
    [1] => 8.180--1sherpa
    [2] => 1.2.2p
)
Array
(
    [0] => Array
        (
            [0] => pythia8
            [1] => 8.180--1sherpa
        )

    [1] => Array
        (
            [0] => 1.2.2p
        )

)
Array
(
    [pythia8] => Array
        (
            [0] => 8.180--1sherpa
        )

    [1.2.2p] => Array
        (
            [0] => 
        )

)

pp @ 7000 GeV