The angle is (0, 360).
| electron sector | [math]\varphi_{e}^{LAB}[/math] | [math]\varphi_{pion}^{LAB}[/math] | [math]\varphi_{e}^{LAB} - \varphi_{pion}^{LAB}[/math] after correction | 
| 1 |  |  |   | 
| 2 |  |  |   | 
| 3 |  |  |   | 
| 4 |  |  |   | 
| 5 |  |  |   | 
| 6 |  |  |   | 
The angle is (0, 360).
I used 27 files. The cut is applied on [math]1.6 \lt  Q^{2} \lt  1.9[/math].