void test()
{
	TChain *chain = new TChain("test");
	chain->Add("test.root");

	chain->Draw("beta_Pip:p_Pip >> betaPip(1000, 0.0, 2.5, 1000, 0.0, 1.1)", "", "contz");
	chain->Draw("beta_P:p_P >> betaP(1000, 0.0, 2.5, 1000, 0.0, 1.1)", "", "same contz");
}