Impact of jet-production data on the next-to-next-to-leading-order determination of HERAPDF2.0 parton distributions

0566575 - FZÚ 2023 RIV DE eng J - Článek v odborném periodiku
Abt, I. - Aggarwal, R. - Andreev, V. - Cvach, Jaroslav - Hladký, Jan - Reimer, Petr … celkem 234 autorů
Impact of jet-production data on the next-to-next-to-leading-order determination of HERAPDF2.0 parton distributions.
European Physical Journal C. Roč. 82, č. 3 (2022), č. článku 243. ISSN 1434-6044. E-ISSN 1434-6052
Grant CEP: GA MŠMT LG14033
Institucionální podpora: RVO:68378271
Klíčová slova: DESY HERA Stor * deep inelastic scattering * ZEUS * H1 * parametrization
Obor OECD: Particles and field physics
Impakt faktor: 4.4, rok: 2022
Způsob publikování: Open access

The HERAPDF2.0 ensemble of parton distribution functions (PDFs) was introduced in 2015. The final stage is presented, a next-to-next-to-leading-order (NNLO) analysis of the HERA data on inclusive deep inelastic ep scattering together with jet data as published by the H1 and ZEUS collaborations. A perturbative QCD fit, simultaneously of αs(MZ2)αs(MZ2) and the PDFs, was performed with the result αs(MZ2)=0.1156±0.0011 (exp) −0.0002+0.0001 (model+parameterisation) ±0.0029 (scale)αs(MZ2)=0.1156±0.0011 (exp) −0.0002+0.0001 (model+parameterisation) ±0.0029 (scale). The PDF sets of HERAPDF2.0Jets NNLO were determined with separate fits using two fixed values of αs(MZ2)αs(MZ2), αs(MZ2)=0.1155αs(MZ2)=0.1155 and 0.118, since the latter value was already chosen for the published HERAPDF2.0 NNLO analysis based on HERA inclusive DIS data only.
Trvalý link: https://hdl.handle.net/11104/0337889