Journal Article/Contribution to a conference proceedings/Contribution to a book

PUBDB-2022-06884

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Measurement and QCD analysis of inclusive jet production in deep inelastic scattering at ZEUS

Lorkowski, F.DESY* ; ZEUS Collaboration (Collaboration author)DESY*

2023
SISSA Trieste

This record in other databases:    

Please use a persistent id in citations: doi:10.22323/1.414.0949  doi:10.3204/PUBDB-2022-06884

Abstract: The measurement of jet production in $e^\pm p$ scattering at HERA is an important input for the understanding of QCD and a well established tool to test perturbative QCD predictions. Jet cross sections can be used to precisely determine the strong coupling constant and its correlation to the gluon distribution function of the proton. A new measurement of inclusive jet cross sections in neutral current deep inelastic scattering using the ZEUS detector at the HERA collider is obtained. The data were taken at HERA 2 at a center of mass energy of $318\,\text{GeV}$ and correspond to an integrated luminosity of $347{pb}^{-1}$. Massless jets, reconstructed using the $k_\perp$-algorithm in the Breit reference frame, are measured as a function of the squared momentum transfer $Q^2$ and the transverse momentum of the jets in the Breit frame $p_{\perp,\text{Breit}}$. The measured jet cross sections are compared to previous measurements as well as NNLO QCD theory predictions. The measurement is used in a QCD analysis at NNLO accuracy to perform a simultaneous determination of parton distribution functions of the proton and the strong coupling constant, resulting in a value of $alpha_\text{s}(M_\text{Z}^2) = 0.1138 \pm 0.0014 \text{ (exp/fit) } {}^{+0.0004}_{-0.0008} \text{ (model/param.) } {}^{+0.0008}_{-0.0007} \text{ (scale)}$. A significantly improved accuracy is observed compared to similar measurements of the strong coupling constant.

Keyword(s): strong interaction, coupling constant ; jet, production ; p, distribution function ; parton, distribution function ; jet, transverse momentum ; quantum chromodynamics, perturbation theory ; gluon, distribution function ; deep inelastic scattering, neutral current ; strong coupling ; DESY HERA Stor ; ZEUS ; GeV ; correlation ; Breit frame ; scattering ; momentum transfer

---

Contributing Institute(s):

1. ZEUS Kollaboration (ZEUS)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)

Experiment(s):

1. HERA: ZEUS

Appears in the scientific report 2022

---

Database coverage:
; ; ; ; DOAJ Seal

---