#include <TObject.h>
#include <TPDGCode.h>
-class AliESDtrack;
+class AliExternalTrackParam;
class AliESDv0 : public TObject {
public:
AliESDv0();
+ AliESDv0(const AliExternalTrackParam &t1, Int_t i1,
+ const AliExternalTrackParam &t2, Int_t i2);
Double_t ChangeMassHypothesis(Int_t code=kK0Short);