15 virtual int runNumber() = 0;
16 virtual int eventId() = 0;
17 virtual double vertexZ() = 0;
18 virtual double s() = 0;
19 virtual double t() = 0;
20 virtual double u() = 0;
21 virtual double pt() = 0;
22 virtual double costh() = 0;
23 virtual double x1() = 0;
24 virtual double x2() = 0;
25 virtual int pid() = 0;