Bouma, Sander (2022) Analysis of the invariant mass resolution of e+e− pairs in Λ0b → Λ0e+e− decays before and after the upgrade of the LHCb experiment. Bachelor's Thesis, Physics.
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Abstract
In order to use the Λ0 b → Λ 0 e +e − decay as a probe for LFU, it needs to be possible to distinguish this decay mode between other decay modes with the same decay products. This is done by the reconstruction of the invariant mass of e +e − pairs. In this thesis, an analysis is performed on the resolution of the invariant mass of these e +e − pairs for both Run 2 and Run 3 of the LHCb, using MC simulated data. This is done by comparing the true momenta and invariant masses to the reconstructed momenta and invariant masses of e +e − pairs in both runs. It was found that the resolution in Run 3 is worse by a factor of 1.25. and that there are more energy losses by a factor of 1.7. The bremsstrahlung reconstruction for Run 3 has improved, as there are 12% more electrons reconstructed with on average a higher accuracy by a factor of 2.1.
| Item Type: | Thesis (Bachelor's Thesis) |
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| Supervisor name: | Veghel, M.C. van and Mulder, M. |
| Degree programme: | Physics |
| Thesis type: | Bachelor's Thesis |
| Language: | English |
| Date Deposited: | 11 Jul 2022 09:26 |
| Last Modified: | 09 Apr 2024 09:03 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/27716 |
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