Cms data analysis
Download
1 / 22

CMS Data Analysis - PowerPoint PPT Presentation


  • 98 Views
  • Uploaded on

CMS Data Analysis. Available Data Sets. 2000 di-muon events around the J/ ψ 2000 di-electron events around the J/ ψ 2000 di-electron events around the Υ 100,000 di-muon events in the invariant mass range 2-110 GeV 100,000 di-electron events in the invariant mass range 2-110 GeV

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' CMS Data Analysis' - york


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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Available data sets
Available Data Sets

  • 2000 di-muon events around the J/ψ

  • 2000 di-electron events around the J/ψ

  • 2000 di-electron events around the Υ

  • 100,000 di-muon events in the invariant mass range 2-110 GeV

  • 100,000 di-electron events in the invariant mass range 2-110 GeV

  • 500 di-electron events around the Z boson

  • 500 di-muon events around the Z boson

  • 500 events of W to eν

  • 500 events of W to μν

  • 13 Higgs candidate events: H to γγ, 4e, 2e2μ, 4μ

  • ~50 1/pb single muons for top quark analysis (508,561 events)


Available data sets1
Available Data Sets

  • 2000 di-muon events around the J/ψ

  • 2000 di-electron events around the J/ψ

  • 2000 di-electron events around the Υ

  • 100,000 di-muon events in the invariant mass range 2-110 GeV

  • 100,000 di-electron events in the invariant mass range 2-110 GeV

  • 500 di-electron events around the Z boson

  • 500 di-muon events around the Z boson

  • 500 events of W to eν

  • 500 events of W to μν

  • 13 Higgs candidate events: H to γγ, 4e, 2e2μ, 4μ

  • ~50 1/pb single muons for top quark analysis (508,561 events)


Available data sets2
Available Data Sets

  • 2000 di-muon events around the J/ψ

  • 2000 di-electron events around the J/ψ

  • 2000 di-electron events around the Υ

  • 100,000 di-muon events in the invariant mass range 2-110 GeV

  • 100,000 di-electron events in the invariant mass range 2-110 GeV

  • 500 di-electron events around the Z boson

  • 500 di-muon events around the Z boson

  • 500 events of W to eν

  • 500 events of W to μν

  • 13 Higgs candidate events: H to γγ, 4e, 2e2μ, 4μ

  • ~50 1/pb single muons for top quark analysis (508,561 events)


Why the tt data set
Whythe tt̄ Data Set?

  • Reasons for chosing the tt̄ data set:

    • well-designed accompanying activity

    • activity requires use of simulated data to determine cuts and efficiencies

    • provides an opportunity to learn Linux, C++, and ROOT


Preparatory activity
Preparatory Activity

  • Dan Karmgard downloaded data and several example programs to his local Linux machine

    • created individual accounts for each member of the group

  • We used MobaXterm to give us virtual terminals on that machine to access the data

  • We studied C++ for aproximately two weeks before starting work with ROOT



Beginnings of top analysis diagnostic plots
Beginnings of Top Analysis:Diagnostic Plots

  • The following plots demonstrate that we can access, read, and histogram data using ROOT


Beginnings of top analysis diagnostic plots1
Beginnings of Top Analysis:Diagnostic Plots

  • Muons


Beginnings of top analysis diagnostic plots2
Beginnings of Top Analysis:Diagnostic Plots

  • Electrons


Beginnings of top analysis diagnostic plots3
Beginnings of Top Analysis:Diagnostic Plots

  • Photons


Beginnings of top analysis diagnostic plots4
Beginnings of Top Analysis:Diagnostic Plots

  • Jets


Beginnings of top analysis diagnostic plots5
Beginnings of Top Analysis:Diagnostic Plots

  • MET



Enriching the top content of the data sample strategy
Enriching the Top Content of the Data Sample: Strategy

  • Identify measured quantities that allow us to distinguish between tt̄ events and expected background

  • Number of simulated events

    • tt̄: 383,167 (signal)

    • Drell-Yan: 109,656 (background)

    • W + Jets: 76,196 (background)

    • QCD: 137 (background)

      total: 569,156






Enriching the top content
Enriching the Top Content

  • Angular

    Distribution


Plans for next summer
Plans for Next Summer

  • Continue tt̄ analysis

    • Develop a set of cuts

    • Determine efficiencies

    • Create tt̄ mass plots

    • Calculate tt̄ cross-section and mass


Conclusions
Conclusions

  • We’ve made substantial progress toward analyzing CMS data in its native format

  • We are in a good position to finish the tt̄ analysis by the end of next summer

  • We are better poised to access and analyze CMS data in general

  • In celebration of CERN’s 60th anniversary, CMS is releasing 27.3 Terabytes of data in September 2014

    • We plan to be ready!


ad