Innovating Works

JEC4HL-LHC

Financiado
Jet Energy Corrections for High-Luminosity LHC
The 2020 update of the European Strategy for Particle Physics puts the HL-LHC at the focal point, together with continued innovation in experimental techniques. Its primary goals include searching for new physics at high energy, e... The 2020 update of the European Strategy for Particle Physics puts the HL-LHC at the focal point, together with continued innovation in experimental techniques. Its primary goals include searching for new physics at high energy, exploration of the Higgs potential and precision tests of the Standard Model. At a hadron collider such as LHC, practically all measurements rely on jet energy corrections (JEC). Many important benchmark channels, such as top quark decaying to b jets and ud or cs jet pairs and inclusive jets produced with numerous gluon jets, have JEC as their limiting uncertainty. At present, the JEC uncertainties are at a level of 1% overall, with similar additional uncertainties from flavor-specific JEC from simulation only. However, evidence suggests that the simulation is biased at the level of these uncertainties, and that these biases will become the decisive factor for further progress. Here we show how to correct these biases with data-driven methods and bring the total uncertainties toward 0.1% level. We found that with integrated luminosity of more than 100/fb, the Z+flavor channel can be used to precisely measure all flavor-JEC, when combined with our novel techniques to address flavor-dependent biases from initial and final state radiation, underlying event and heavy-flavor neutrino production. Furthermore, we found that inclusive jet production can be used to monitor further drifts of JEC at 0.1% precision and that our observations can be motivated with a parameterized model of particle flow jet response. Our results plot a path to JEC at the HL-LHC high pileup environment, and show how to systematically control the leading simulation uncertainties with data and allow many physics analyses to improve their JEC-related systematic uncertainties. We anticipate our work will be a starting point to transition to 0.1%-level precision in JEC across the field and that it will lead to a number of precision jet physics measurements as a result. ver más
31/08/2027
HELSINGIN YLIOPIST...
2M€
Perfil tecnológico estimado
Duración del proyecto: 59 meses Fecha Inicio: 2022-09-07
Fecha Fin: 2027-08-31

Línea de financiación: concedida

El organismo HORIZON EUROPE notifico la concesión del proyecto el día 2022-09-07
Línea de financiación objetivo El proyecto se financió a través de la siguiente ayuda:
ERC-2021-COG: ERC CONSOLIDATOR GRANTS
Cerrada hace 3 años
Presupuesto El presupuesto total del proyecto asciende a 2M€
Líder del proyecto
HELSINGIN YLIOPISTO No se ha especificado una descripción o un objeto social para esta compañía.
Perfil tecnológico TRL 4-5