<html><body><div style="font-family: arial,helvetica,sans-serif; font-size: 12pt; color: #000000"><div>Hi all,</div><div><br data-mce-bogus="1"></div><div>Here is a follow up to yesterday discussion about phi difference for protons. I brought it up at today's software meeting. Our guess was correct. Current version of tracking does not account for energy losses between the vertex and the first tracking layer. Veronique has some ideas how to implement this. Inclusion of the forward micromegas into the forward tracking should help with this as well since it is much closer to the vertex than R1 drift chambers.</div><div><br></div><div data-marker="__SIG_PRE__">-Eugene</div></div></body></html>