[Triumf-seminars] TRIUMF Particle Phys/SciTec Seminar today at 12:15

[TRIUMF Seminars]

Date/Time: Mon 2016-08-15 at 12:15

Location:  Auditorium          

Speaker:   Jie Fu (UBC)

Title:     Study of Backgrounds in the NA62 measurement of K+ → π+νν and search for π0 → νν decay

Abstract: The NA62 experiment aims at measuring the branching ratio of the ultra-rare decay K->pi nu nubar; with 10% precision. To achieve the desired precision, high levels of background rejection must be accomplished using techniques such as high-resolution timing, kinematic rejection, particle identification, and hermetic vetoing of photons. K+ -> pi+ pi0 (Kpi2) decays, one of the largest background sources, are mainly rejected by kinematics reconstruction and photon vetoing in NA62. To evaluate Kpi2 background rejection capabilities of the NA62 system, we studied the inefficiency of these two techniques using 2015 minimum bias data. Also, an upper limit on the branching ratio of the invisible decay pi0 -> nu nubar , was obtained at 90% confidence level.


Please bring your own lunch.

______________________________

General TRIUMF seminar information available at http://www.triumf.ca/home/upcoming-events/about-seminars-lectures