Top (tt) : Jet mass : Jet mass

pythia6~6.426--1herwig7~7.0.0Array
(
    [0] => pythia6
    [1] => 6.426--1herwig7
    [2] => 7.0.0
)
Array
(
    [0] => Array
        (
            [0] => pythia6
            [1] => 6.426--1herwig7
        )

    [1] => Array
        (
            [0] => 7.0.0
        )

)
Array
(
    [pythia6] => Array
        (
            [0] => 6.426--1herwig7
        )

    [7.0.0] => Array
        (
            [0] => 
        )

)

pp @ 8000 GeV