Albanese, Pietro (2022) Improving the sensitivity study of Bc+ -> tau+ nu at the LHCb detector by rejecting the three most dangerous background modes. Bachelor's Thesis, Physics.
|
Text
bPHYS_2022_PietroAlbanese.pdf Download (1MB) | Preview |
|
![[img]](https://fse.studenttheses.ub.rug.nl/style/images/fileicons/text.png) |
Text
toestemming.pdf Restricted to Registered users only Download (93kB) |
Abstract
As part of a sensitivity study for the LHCb upgrade, the invariant mass of the pions produced in the decays B+ c → τ +(→ π +π −π +ντ )ντ and B+ → τ +(→ π +π −π +ντ )ντ is analysed, in order to distinguish these two signal modes from the three most dangerous background modes: B+ → π +π −π +D0 , B+ → π +π −π +D0∗ and B+ → D−(→ π −π +π −)π +π + (normalization mode). The data were simulated using the fast simulation package RapidSim and it was found that a cut on the invariant mass of the pions at minv = 1.8 GeV is able to remove 99.98% of the normalization mode, 88.82% of B+ → π +π −π +D0 and 86.86% of B+ → π +π −π +D0∗ , while maintaining 99.999% of both signal modes. Then the effect of this cut is studied by performing a MultiVariate Analysis, whose purpose is to separate signal from background by analysing multiple observables. Lastly, a likelihood fit was simulated to estimate the number of yields of B+ c and B+. It was found that the uncertainty on the number of yields of B+ c and B+ decreased by 17.7% and 4.4% respectively by including the invariant mass cut.
| Item Type: | Thesis (Bachelor's Thesis) |
|---|---|
| Supervisor name: | Mulder, M. |
| Degree programme: | Physics |
| Thesis type: | Bachelor's Thesis |
| Language: | English |
| Date Deposited: | 08 Jul 2022 08:54 |
| Last Modified: | 26 Aug 2022 13:27 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/27680 |
Actions (login required)
 |
View Item |