1 / 13

Processes involving final state: Protons, muons, and gammas in MINERvA/Jupiter Group Meeting

This study focuses on understanding processes involving final states, specifically protons, muons, and gammas, using data from MINERvA/Jupiter Group Meeting. Various calculations and comparisons are made using truth and reconstructed information to analyze the properties of these particles.

aunzueta
Download Presentation

Processes involving final state: Protons, muons, and gammas in MINERvA/Jupiter Group Meeting

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. final state study Jaewon Park University of Rochester MINERvA/Jupiter Group Meeting, Feb 7, 2007

  2. Processes involving with final state • Proton and muon tracks will determine primary vertex • Two gammas are from NC CC

  3. ECAL for • Generate single pi0 event • Theta=0, 20cm from US-ECAL • 200MeV to 1GeV • OD hit ignored • Energy summed using dE/dx weighting

  4. Processes involving with final state • Truth primary vertex is used • Didn’t require minimum angle between two gammas • I used truth information to know which gammas is associated with each hits. • Calculate gamma’s momentum from direction and energy

  5. Flowchart dE/dx weighted energy deposit from truth hit primary vertex Two gammas’ center of energy w.r.t. primary vertex Two gammas’ total energy deposit Two gammas’ direction w.r.t. primary vertex Two gammas’ 4-momentum Pi0’s 4-omentum Pi0’s mass

  6. Sanity check • Compare reconstructed gamma with truth information Truth info Using center of energy Difference

  7. Sanity check(2)

  8. invariant mass • It’ll be useful to use this quantity in filter out background.

  9. resolution • Good agreement with ECAL calculation

  10. NC RES events • Two gammas’ resolution • Each gamma energy > 100MeV

  11. NC RES events – Pi0 resolution • Reconstructed pi0 mass peak is found at 128MeV (5% less than true value) • True pi0 mass: 135MeV

  12. Checking tracker data • True pi0 vertex • 1151/5000 selection eff: requires primary proton and primary pi0 and two gammas • vPos(3) from tracker vertex result • 326/5000: requires event=vevent and vMoth=0 • 51/5000 selection eff: combine two selections

  13. Next step • Determine primary vertex from proton track • Need to check definition of ntuple • Scintillator bar ID can be used in stead of using truth hit position

More Related