RT Dissertation/Thesis
T1 Tests of Lepton Flavour Universality with Semileptonic D and B decays at the LHCb experiment
A1 Gioventù, Alessandra
K1 lepton flavour universality
K1 standard model
K1 new physics
K1 lhc
K1 lhcb
K1 heavy flavour
AB In The Standard Model, the coupling between the leptons and the gaugebosons is independent of the lepton generation. This is called Lepton Flavour Universality (LFU). This thesis aimsto test LFU by studying two different processes involving D and B meson decays using data recorded by the LHCbexperiment. The first LFU test aims to measure the branching fraction ratio R(mu/e)=BF(D0->Kmunu)/BF(D0->Kenu). The result, which is still blinded, presents an uncertainty of 0.003(stat)±0.013(syst). The second LFU testis a simultaneous measurement of R(D0) and R(D*0), defined as BF(B->D(*)0taunu)/BF(B->D(*)0lnu), where(l=mu,e). This thesis presents a model implemented to study one of the main background components of this study,the inclusive Ds->3pi(X) decays, where the Ds decays in the tau decay vertex.
YR 2023
FD 2023
LK http://hdl.handle.net/10347/30570
UL http://hdl.handle.net/10347/30570
LA eng
DS Minerva
RD 27 abr 2026