SubsidieMeestersChallenging the Standard Model with suppressed b to d l+l- decays
The project aims to investigate rare b to dll decays to uncover new physics and matter-antimatter asymmetries, utilizing advanced analysis tools from the LHCb experiment.
Projectdetails
Introduction
The Standard Model (SM) of particle physics is one of the most complete theories in science with a hugely successful predicting power. However, it is unable to explain critical observed phenomena, such as the dominance of matter over antimatter in the universe, and thus needs to be extended.
Rare Decays and New Physics
Rare decays of b quarks to an s quark and two leptons (b to sll) are very sensitive to the existence of New Physics (NP). Recent measurements of their properties show intriguing deviations with respect to SM predictions that could be the first clear hint of NP in decades.
In this project, I will explore the related and even more suppressed b-quark decays to a d quark and two leptons (b to dll), which are so far poorly known and will shed light on the type of NP that could explain the observed discrepancies. For this purpose, my team will develop innovative analysis tools and exploit the uniquely large sample of b hadrons from the LHCb experiment.
Research Questions
The CLIMB project will address two specific questions:
- Are the deviations observed in b to sll decays also present in b to dll transitions?
- Are there new sources of matter-antimatter asymmetry beyond the SM in b to dll processes?
Methodology
The first question will be addressed by measuring differential decay probabilities and lepton universality ratios in b to dll decays for the first time. In the SM, these transitions are related by the quark-mixing matrix, the hierarchy of which is not fully understood. NP models aim to provide an explanation for the structure observed in nature. Knowing the properties of b to dll decays precisely is a critical input in this endeavor.
The second question will be answered by measuring matter-antimatter asymmetries in b to dll decays with unprecedented precision, providing very strong constraints to NP models predicting an enhanced quantity.
Challenges
The main challenge of this program lies in the study of very suppressed decays. Innovative reconstruction and selection techniques will be developed to access them.
Financiële details & Tijdlijn
Financiële details
| Subsidiebedrag | € 1.622.273 |
| Totale projectbegroting | € 1.622.273 |
Tijdlijn
| Startdatum | 1-4-2023 |
| Einddatum | 31-3-2028 |
| Subsidiejaar | 2023 |
Partners & Locaties
Projectpartners
- UNIVERSITAT DE BARCELONApenvoerder
Land(en)
Vergelijkbare projecten binnen European Research Council
| Project | Regeling | Bedrag | Jaar | Actie |
|---|---|---|---|---|
AcceLerated PreCision Tests of Lepton UniversAlityThe ALPaCA project aims to enhance real-time analysis systems for the LHCb experiment to improve measurements of lepton flavor universality and identify new physics through advanced computing. | ERC Starting... | € 1.384.543 | 2022 | Details |
Comprehensive search for new phenomena in the dilepton spectrum at the LHCThe DITTO project aims to achieve precise measurements of high mass Drell-Yan processes to explore new physics beyond the Standard Model using advanced techniques at the LHC. | ERC Consolid... | € 1.999.409 | 2023 | Details |
B-resonance Algorithm using Rare DecaysBARD aims to enhance the search for new light particles coupling to third generation quarks at the LHC by advancing data analysis techniques, potentially leading to groundbreaking discoveries. | ERC Starting... | € 1.479.375 | 2024 | Details |
New physics in parity violation. From the Thomson limit to the energy frontierThis project aims to enhance the precision of the weak mixing angle in the Standard Model by integrating LHC and MESA data, potentially revealing new physics across a vast energy range. | ERC Advanced... | € 3.202.849 | 2024 | Details |
INnovative TRiggEr techniques for beyond the standard model PhysIcs Discovery at the LHCThis project aims to enhance trigger systems at the LHC using advanced Machine Learning to identify long-lived particles, potentially revealing evidence of beyond the standard model physics. | ERC Starting... | € 1.499.375 | 2023 | Details |
AcceLerated PreCision Tests of Lepton UniversAlity
The ALPaCA project aims to enhance real-time analysis systems for the LHCb experiment to improve measurements of lepton flavor universality and identify new physics through advanced computing.
Comprehensive search for new phenomena in the dilepton spectrum at the LHC
The DITTO project aims to achieve precise measurements of high mass Drell-Yan processes to explore new physics beyond the Standard Model using advanced techniques at the LHC.
B-resonance Algorithm using Rare Decays
BARD aims to enhance the search for new light particles coupling to third generation quarks at the LHC by advancing data analysis techniques, potentially leading to groundbreaking discoveries.
New physics in parity violation. From the Thomson limit to the energy frontier
This project aims to enhance the precision of the weak mixing angle in the Standard Model by integrating LHC and MESA data, potentially revealing new physics across a vast energy range.
INnovative TRiggEr techniques for beyond the standard model PhysIcs Discovery at the LHC
This project aims to enhance trigger systems at the LHC using advanced Machine Learning to identify long-lived particles, potentially revealing evidence of beyond the standard model physics.