View source for Pion Meeting June 11 2021 4:30PM ET

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* Bluejeans link: [https://bluejeans.com/420107252 420 107 252]
* Dial-in: [tel:408-740-7256p420107252# 408-740-7256] (US), [tel:888-240-2560p420107252# 888-240-2560] (US Toll Free), [tel:408-317-9253p420107252# 408-317-9253] (Alternate number)

=Agenda=

# Updates on pion detector studies (Elham)
# Beam generator simulations (Raj)
# Bayesian pion background correction (Julia)

=Attendance=

Elham, Sakib, Julia, Raj, David, Wouter

=Minutes=

* David's slides:
** Large number of events are peaked in two peaks phi-shifted by 10 degrees from the pion lucite detector
** This peak bypasses the showermax at the high-radius end
** These events seem to hit the outer corners of the lucite
** TODO: run simulation with showermax lightguides as vacuum (hypothesis: is it showermax secondaries scattering to high-r into the lightguide, then back inwards to the lucite?)
** TODO: add detector both upstream and downstream of showermax at the same time
* Elham
** Pion lucite lightguide as vacuum: slight decrease in Moller rate
** Pion/electron ratio at main detector plane is 0.1%, as expected, with rate of Moller electrons in agreement -> all seems well
** Most background in lucite is coming from same sector in hit phi vs vertex phi
** Angle into lucite: small coding error
** TODO: fix expression for theta with hit.x and hit.y
* Julia
** Bayesian correction of pion correction: postponed due to technical difficulties