Summary
The project will characterise the physics of semileptonic b -> c tau nu quark transitions, by studying the angular properties of B -> D(*) tau nu meson decays. The branching fractions of B -> D(*) tau nu decays are measured to be larger than expected relative to their B -> D(*) mu nu counterparts, offering an intriguing hint of beyond the Standard Model (SM) physics in the form of lepton universality violation. Due to the spin structure of B -> D(*) tau nu decays, the full decay rate is described by a sum of twelve angular terms each with a corresponding coefficient. The values of these coefficients can be altered by New Physics (NP) operators such as charged Higgs bosons, Z' bosons, or leptoquarks, and measuring their values thus provides a powerful probe to search for deviations from the SM.
The project will use LHCb Run 1 and 2 data to measure the B -> D(*) tau nu angular coefficients and signal yields in a model-independent manner, making use of novel binned template fit methods that fully account for resolution effects caused by the missing neutrino information. The measurements made will be a ground-breaking proof-of-principal, paving the way for high-precision angular coefficient measurements in future.
The project will use LHCb Run 1 and 2 data to measure the B -> D(*) tau nu angular coefficients and signal yields in a model-independent manner, making use of novel binned template fit methods that fully account for resolution effects caused by the missing neutrino information. The measurements made will be a ground-breaking proof-of-principal, paving the way for high-precision angular coefficient measurements in future.
Unfold all
/
Fold all
More information & hyperlinks
| Web resources: | https://cordis.europa.eu/project/id/894674 |
| Start date: | 01-10-2020 |
| End date: | 30-09-2022 |
| Total budget - Public funding: | 203 149,44 Euro - 203 149,00 Euro |
Cordis data
Original description
The project will characterise the physics of semileptonic b -> c tau nu quark transitions, by studying the angular properties of B -> D(*) tau nu meson decays. The branching fractions of B -> D(*) tau nu decays are measured to be larger than expected relative to their B -> D(*) mu nu counterparts, offering an intriguing hint of beyond the Standard Model (SM) physics in the form of lepton universality violation. Due to the spin structure of B -> D(*) tau nu decays, the full decay rate is described by a sum of twelve angular terms each with a corresponding coefficient. The values of these coefficients can be altered by New Physics (NP) operators such as charged Higgs bosons, Z' bosons, or leptoquarks, and measuring their values thus provides a powerful probe to search for deviations from the SM.The project will use LHCb Run 1 and 2 data to measure the B -> D(*) tau nu angular coefficients and signal yields in a model-independent manner, making use of novel binned template fit methods that fully account for resolution effects caused by the missing neutrino information. The measurements made will be a ground-breaking proof-of-principal, paving the way for high-precision angular coefficient measurements in future.
Status
CLOSEDCall topic
MSCA-IF-2019Update Date
28-04-2024
Images
No images available.
Geographical location(s)
