HEИндивидуална стипендия2022–2024

RadCor4HEF · Radiative Corrections for Heavy Quark(-onium) Production in High-Energy Factorisation

„Хоризонт Европа“ — Действия „Мария Склодовска-Кюри“

Период: 2022-12-01 → 2024-11-30
Финансиране от ЕС: 195 915 €
Участници: 2
Схема: HORIZON-TMA-MSCA-PF-EF

Линиите свързват координатора с партньорите.

Накратко на български

Производството на тежки кварки при високоенергийни сблъсъци се анализира чрез нови математически методи за изчисление. Това помага за по-точни теоретични предсказания, които са необходими, за да се разграничат новите физични явления от познатите процеси в ускорителите.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Radiative Corrections for Heavy Quark(-onium) Production in High-Energy Factorisation

With the Large Hadron Collider (LHC) and the prospects for the Future Hadron-Hadron Circular Collider (FCC-hh), hadronic collisions at high energy will remain for the coming decades our main tools to look for new physical phenomena. In such collisions, the processes involving strong interactions, i.e. Quantum Chromodynamics (QCD), constitute the main part of the Standard Model (SM) background. With increasing collision energy, the commonly used framework for theoretical predictions in QCD -- the Collinear Factorisation (CF) in the fixed order in strong coupling constant (alpha_s), becomes insufficient. This happens because of the appearance of large higher-order in alpha_s corrections to the hard-scattering coefficient function of CF, enhanced by logarithms of partonic collision energy or rapidity between two particles or jets, produced in the collision. In this project we have used the formalism of High-Energy Factorisation (HEF) to resum such large logarithmic corrections within CF for processes of inclusive and exclusive heavy quarkonium production. We match the HEF-resummed predictions with fixed-order computations in CF to provide uniformly-accurate theoretical predictions across wide range of energies. We also compute one-loop and real-emission Next-to-Leading Order (NLO) corrections to one of the process-dependent part of the HEF-formula -- the impact-factor, with the goal of extending our predictions beyond the Doubly-Logarithmic Approximation (DLA) which had been used so far to provide CF+HEF matched predictions.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

At High Energy hadron colliders, the wide phase space for particle emissions can compensate the smallness of the strong-interaction coupling of Quantum Chromodynamics (QCD). At the LHC this effect is crucial for production of mesons containing charm and bottom quarks. At hadron collider with energy of 100 TeV, all Standard Model physics will be affected by these large corrections.RadCor4HEF's objective is to develop an efficient and robust method to match these phase-space corrections, provided by High-Energy Factorization (HEF) formalism with standard QCD computations in Collinear Factorization(CF). At present, this is not available. I aim at advancing the HEF including sub-leading corrections in the strong-interaction coupling within a new computational framework. I will apply it to study the production of (i) the eta_{c,b}-mesons in the LHCb kinematics, (ii) photoproduction of J/psi and Upsilon mesons (iii) hadroproduction of open heavy-flavour mesons.For all of these observables the theoretical uncertainties are larger than the experimental ones and we will change this. The matched CF+HEF framework solves the instability problems of standard CF computations for eta_{c,b}, J/psi and open heavy flavour meson production at the LHC energies. RadCor4HEF will contribute to our quest to understand the proton structure and to predict heavy-quark bound-state production, which are the most poorly understood parts of QCD.The science generated by RadCor4HEF will be disseminated via top-level publications, oral communications, outreach events and computing codes integrated in the EU Virtual Access ""NLOAccess"". Project activities will take place in the theory pole of IJCLab Orsay managed by CNRS, which gathers all the required expertise in the theory and phenomenology of QCD and particle physics. The exceptional environment part of Paris-Saclay U. will offer me an ideal training to develop my skills, to extend my research network and to become an independent researcher.""

Оригинален текст от CORDIS (на английски).

Участници

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS · ParisКоординаторФранция
UNIVERSITE PARIS-SACLAY · Gif-Sur-YvetteФранция