Search for the decay B → ppτν at LHCb
File(s)
Author(s)
Newcombe, Ryan
Type
Thesis
Abstract
This work presents a search for the decay B → ppτν using data gathered with the
LHCb experiment from 2016 to 2018. No significant signal is observed and a limit is
placed on the ratio of branching fractions
R(pp) = B → ppτν/B → ppμν < 1.46
at a 95% confidence level, which represents the first limit on a semileptonic ratio of
this kind involving decays that are suppressed by the most poorly understood ele-
ment of the CKM matrix; Vub. An investigation into the B → pp transition form
factors in B → ppℓν decays, which was instrumental in facilitating the search for
B → ppτν , is also presented using the 2011–2012 LHCb data sample.
LHCb experiment from 2016 to 2018. No significant signal is observed and a limit is
placed on the ratio of branching fractions
R(pp) = B → ppτν/B → ppμν < 1.46
at a 95% confidence level, which represents the first limit on a semileptonic ratio of
this kind involving decays that are suppressed by the most poorly understood ele-
ment of the CKM matrix; Vub. An investigation into the B → pp transition form
factors in B → ppℓν decays, which was instrumental in facilitating the search for
B → ppτν , is also presented using the 2011–2012 LHCb data sample.
Version
Open Access
Date Issued
2022-04
Date Awarded
2022-07
Copyright Statement
Creative Commons Attribution NonCommercial Licence
License URL
Advisor
Patel, Mitesh
Sponsor
Science and Technology Facilities Council (Great Britain)
Publisher Department
Physics
Publisher Institution
Imperial College London
Qualification Level
Doctoral
Qualification Name
Doctor of Philosophy (PhD)