How to add TLegend in roofit?

[souvik]

Hi Experts,
I have TLegend like this now. All the text is within the box now.
First I want to remove the box. And “Belle II 2020” will be bold and “prelimenery” will not be in bold.
And B -> D* pi will be like this — B -> D* pi(— should highlight the blue colour) and same thing for bkg it should be in green colour.

I have tried this and my output is something like this.

Please suggest me what should I do ?

Thanks

  TLegend *leg1 = new TLegend(0.8, 0.5, 0.3, 0.9);
  leg1->SetFillColor(kWhite);
  leg1->AddEntry(deltam, "Belle II 2020 (Preliminary)", "");
  leg1->AddEntry(deltam, "N = (3395 #pm 61)", "");
  leg1->AddEntry(deltam, "#intL dt = 72 fb^{-1}", "");
  leg1->AddEntry(deltam, "B^{0} -> D^{*}#pi", "");
  leg1->AddEntry(deltam, "bkg", "");
  leg1->Draw();

[yus]

Hi,

@souvik

First I want to remove the box.

– add
leg1->SetBorderSize(0);
right before
leg1->Draw();

@souvik

And “Belle II 2020” will be bold and “prelimenery” will not be in bold.

– I believe this should not be a part of the legend. The legend is usually there to explain what different lines/points/bands refer to. For everything else you should just create a TText or a TLatex object on the canvas.

@souvik

And B → D* pi will be like this — B → D* pi(— should highlight the blue colour) and same thing for bkg

– to do this, instead of deltam in both
leg1->AddEntry(deltam, "B^{0} -> D^{}#pi", “”);
and
leg1->AddEntry(deltam, “bkg”, “”);
you should provide a name of the object holding the blue solid line and green dashed line, respectively.

P.S. You really REALLY don’t want to abbreviate “background” to “bkg” in the legend.

[couet]

What is deltam ? the first parameter of AddEntry should be a ROOT object inheriting from the TAttxxx classes… See the TLegend documentation

[souvik]

Thanks.It did help.

[souvik]

#textbf{Belle II} Simulation didn’t work.

Don’t know why ?

[souvik]

I got this now.

Thanks.