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arxiv: 2309.02889 · v2 · pith:7L2J6GOWnew · submitted 2023-09-06 · ✦ hep-ex

Measurement of jet production in deep inelastic scattering and NNLO determination of the strong coupling at ZEUS

ZEUS Collaboration: I. Abt , R. Aggarwal , V. Aushev , O. Behnke , A. Bertolin , I. Bloch , I. Brock , N.H. Brook
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R. Brugnera A. Bruni P.J. Bussey A. Caldwell C.D. Catterall J. Chwastowski J. Ciborowski R. Ciesielski A.M. Cooper-Sarkar M. Corradi R.K. Dementiev S. Dusini J. Ferrando B. Foster E. Gallo D. Gangadharan A. Garfagnini A. Geiser G. Grzelak C. Gwenlan D. Hochman N.Z. Jomhari I. Kadenko U. Karshon P. Kaur R. Klanner U. Klein I.A. Korzhavina N. Kovalchuk M. Kuze B.B. Levchenko A. Levy B. L\"ohr E. Lohrmann A. Longhin F. Lorkowski E. Lunghi I. Makarenko J. Malka S. Masciocchi K. Nagano J.D. Nam Yu. Onishchuk E. Paul I. Pidhurskyi A. Polini M. Przybycie\'n A. Quintero M. Ruspa U. Schneekloth T. Sch\"orner-Sadenius I. Selyuzhenkov M. Shchedrolosiev L.M. Shcheglova N. Sherrill I.O. Skillicorn W. S{\l}omi\'nski A. Solano L. Stanco N. Stefaniuk B. Surrow K. Tokushuku O. Turkot T. Tymieniecka A. Verbytskyi W.A.T. Wan Abdullah K. Wichmann M. Wing S. Yamada Y. Yamazaki A.F. \.Zarnecki O. Zenaiev
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A new measurement of inclusive-jet cross sections in the Breit frame in neutral current deep inelastic scattering using the ZEUS detector at the HERA collider is presented. The data were taken in the years 2004 to 2007 at a centre-of-mass energy of $318\,\text{GeV}$ and correspond to an integrated luminosity of $347\,\text{pb}^{-1}$. Massless jets, reconstructed using the $k_t$-algorithm in the Breit reference frame, have been 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 and to perturbative QCD predictions. The measurement has been used in a next-to-next-to-leading-order QCD analysis to perform a simultaneous determination of parton distribution functions of the proton and the strong coupling, resulting in a value of $\alpha_s(M_Z^2) = 0.1142 \pm 0.0017~\text{(experimental/fit)}$ ${}^{+0.0006}_{-0.0007}~\text{(model/parameterisation)}$ ${}^{+0.0006}_{-0.0004}~\text{(scale)}$, whose accuracy is improved compared to similar measurements. In addition, the running of the strong coupling is demonstrated using data obtained at different scales.

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