Difference between revisions of "Bachelor student Projects"
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achterhalen hoe daarop het beste de spin-richting van het top-quark kan worden bepaald. Dit kan | achterhalen hoe daarop het beste de spin-richting van het top-quark kan worden bepaald. Dit kan | ||
vervolgens met de ATLAS data worden vergeleken, indien de tijd dat toestaat. | vervolgens met de ATLAS data worden vergeleken, indien de tijd dat toestaat. | ||
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| + | {| border="1" cellpadding="2" cellspacing="0" | ||
| + | |- | ||
| + | ! style="background:#339999;" | <font color=#ffffff> 2) Accurate measurement of the mass of the Higgs particle </font> | ||
| + | |} | ||
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| + | ''' Supervisors:''' Ivo van Vulpen (staf) and Antonio Castelli (PhD student) | ||
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| + | ''' Research description: ''' | ||
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| + | The ATLAS detector allows to measure the mass of the | ||
| + | Higgs boson, recently discovered in 2012. | ||
| + | This measurement is a crucial test for the validity of the | ||
| + | Standard Model, the theory that describes the interaction | ||
| + | among elementary particles. | ||
| + | The student will be guided through the strategy of the | ||
| + | measurement of the Higgs boson mass from the measurement | ||
| + | of the mass of the four leptons produced in one of its possible | ||
| + | decay. | ||
| + | The student's task will be to study the impact of the er- | ||
| + | ror distribution of the four leptons mass in the final mea- | ||
| + | surement of the Higgs mass. In order to do that he/she will | ||
| + | learn the fundamental notions of statistical data analysis us- | ||
| + | ing the ROOT software. He/she will then be asked to study | ||
| + | the simulated ATLAS data to understand the main sources of | ||
| + | uncertainty on the momentum of the reconstructed particles. | ||
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| + | Schedule | ||
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| + | week 1: Small introduction about theory and ATLAS experiment | ||
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| + | week 2: Introduction to ROOT and Higgs to four lepton event selection | ||
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| + | week 3/4: Creation and study of four lepton distribution of mass and error | ||
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| + | week 4/5: Creation and study of four lepton distribution of mass and error | ||
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| + | week 6/7: Closer look at events with large error, where does it come from? | ||
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| + | week 8/9: Closer look at events with large error, where does it come from? | ||
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| + | week 10: Presentation of the results | ||
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| + | week 11: Writing and discussion | ||
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| + | week 12: Writing and discussion | ||