On the background in the $γp \to ω(π^0γ) p$ reaction and mixed event simulation

Details On the background in the $γp \to ω(π^0γ) p$ reaction and mixed event simulation On the background in the $γp \to ω(π^0γ) p$ reaction and mixed event simulation

2010-03-11

arxiv.org/abs/1003.2363v1

Eur.Phys.J.A46:223-230,2010

Physics

Nuclear Physics

Nuclear Theory

10 pages, 5 figures

Scientific paper

10.1140/epja/i2010-11033-x

In this paper we evaluate sources of background for the $\gamma p \to \omega p$, with the $\omega$ detected through its $\pi^0 \gamma$ decay channel, to compare with the experiment carried out at ELSA. We find background from $\gamma p \to \pi^0 \pi^0 p$ followed by decay of a $\pi^0$ into two $\gamma$, recombining one $\pi^0$ and one $\gamma$, and from the $\gamma p \to \pi^0 \eta p$ reaction with subsequent decay of the $\eta$ into two photons. This background accounts for the data at $\pi^0 \gamma$ invariant masses beyond 700 MeV, but strength is missing at lower invariant masses which was attributed to photon misidentification events, which we simulate to get a good reproduction of the experimental background. Once this is done, we perform an event mixing simulation to reproduce the calculated background and we find that the method provides a good description of the background at low $\pi^0 \gamma$ invariant masses but fakes the background at high invariant masses, making background events at low invariant masses, which are due to $\gamma$ misidentification events, responsible for the background at high invariant masses which is due to the $\gamma p \to \pi^0 \pi^0 p$ and $\gamma p \to \pi^0 \eta p$ reactions.

Affiliated with

Also associated with

No associations

Rating

On the background in the $γp \to ω(π^0γ) p$ reaction and mixed event simulation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with On the background in the $γp \to ω(π^0γ) p$ reaction and mixed event simulation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the background in the $γp \to ω(π^0γ) p$ reaction and mixed event simulation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-540801