void feyn() {
	TCanvas *c1 = new TCanvas("c1", "Muon Decay", 10,10, 600, 300);
	c1->Range(0, 0, 160, 110);
	gStyle->SetLineWidth(3);
	TArrow * muarr = new TArrow( 55,55 , 5,5, .05, "-|>-");
	TArrow * nubarmuarr = new TArrow( 5,105 , 55,55, .05, "-|>-");
	TArrow * Warr = new TArrow( 55,55 , 105,55, .1, "--->-");
	TArrow * earr = new TArrow( 155,105 , 105,55, .05, "-|>-");
	TArrow * nuearr = new TArrow( 105,55 , 55,105, .05, "-|>-");
	Warr->SetLineStyle(2);
	muarr->Draw();
	nubarmuarr->Draw();
	Warr->Draw();
	earr->Draw();
	nuearr->Draw();
	TLatex t;
	t.SetTextAlign(22);
	t.SetTextSize(0.12);
	t.DrawLatex(10,30,"#mu^{+}");
	t.DrawLatex(10,75,"#bar{#nu}_{#mu}");
	t.DrawLatex(140,75,"e^{+}");
	t.DrawLatex(65,75,"#nu_{e}");
	t.DrawLatex(90,40,"W^{+}");
	t.DrawLatex(120,15,"#mu^{+}#rightarrowe^{+}#nu_{e}#bar{#nu}_{#mu}");
//	TCurlyArc *gamarc = new TCurlyArc(55,55,15,225,360);
//	gamarc->SetWavy();
//	gamarc->Draw();
//	t.DrawLatex(55,25,"#gamma");
}