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PHYSICS ANALYSIS AT THE CMS EXPERIMENT
SUPERVISOR: Mirena Paneva SUPERSTUDENTS: Simona Todorova Kaloyan Botev
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BASIC EQUATIONS IN CERN:
HIGGS BOSON CERN’S PHYSICS FITTING HIGGS BOSON X BOSON PHYSICS IN CERN COMPUTING UNFITTED HISTOGRAM GOOD HISTOGRAM
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THE PROJECT WORK: TASK: RECONSTRUCTION OF THE Z BOSON
THE BASICS OF PHYSICS ANALYSIS AT THE CMS EXPERIMENT USING SOME OF THE SOFTWARE TOOLS TO VISUALIZE AND ANALYZE DATA RECONSTRUCTION OF THE Z BOSON
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WHAT IS CMS ABOUT?
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HOW TO RECONSTRUCT THE Z BOSON?
WHAT IS Z BOSON?
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HOW TO RECONSTRUCT THE Z BOSON?
WHAT IS INVARIANT MASS? CHARACTERISTIC OF THE SYSTEM'S TOTAL ENERGY AND MOMENTUM THAT IS THE SAME IN ALL FRAMES OF REFERENCE
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WHAT DO YOU NEED? LINUX LOGICAL THINKING PINCH OF PYTHON SKILLS
100 C++ PROGRAMING SKILLS CMSSW ACCESS (NEARLY IMPOSSIBLE)
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THEORETICAL EXPLANATION
SPECIAL RELATIVITY? ENERGY-MOMENTUM RELATION: 𝑬 𝟐 = (𝒑𝒄) 𝟐 + ( 𝒎 𝒐 𝒄 𝟐 ) 𝟐 E - ENRGY P - MOMENTUM Mo - INVARIANT MASS
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THEORETICAL EXPLANATION
SPECIAL RELATIVITY? 𝒎 𝟐 = 𝑬 𝟐 𝒄 𝟒 − 𝒑 𝟐 𝒄 𝟐 Working in natural system : c= h=1 𝒎 𝒐 = 𝑬 ′ + 𝑬 ′′ 𝟐 − ( 𝒑 ′ + 𝒑 ′′ ) 𝟐 E ‘– ENRGY OF FIRST PARTICLE E”- ENERGY OF SECOND PARTICLE P’- VECTOR OF THE MOMENTUM OF FIRST PARTICLE P”- VECTOR OF THE MOMENTUM OF SECOND PARTICLE
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THE IMPORTANCE OF COMPUTING
“THE OLD-FASHIONED WAY”
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TLORENTZVECTOR- THE LOVED ONE
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HISTOGRAMS AND PARAMETERS
Pt
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HISTOGRAMS AND PARAMETERS
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HISTOGRAMS AND PARAMETERS
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HISTOGRAMS AND PARAMETERS
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HISTOGRAMS AND PARAMETERS
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FITTING HISTOGRAMS WHY BOTH GAUSS AND BREIT-WIGNER?
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FITTING HISTOGRAMS
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FITTING HISTOGRAMS
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2D HISTOGRAMS
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2D HISTOGRAMS
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DIGITAL VISUALISATION
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DIGITAL VISUALISATION
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DIGITAL VISUALISATION
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WHAT IS THE Z BOSON DECAY?
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THANK YOU!
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