Measurement of multijet production in $${e\!\!\;p}$$ e p collisions at high $$\varvec{Q^2}$$ Q 2 and determination of the strong coupling $$\varvec{{\alpha _s}} $$ α s

Abstract

Inclusive jet, dijet and trijet differential cross sections are measured in neutral current deep-inelastic scattering for exchanged boson virtualities 150 < Q 2 < 15 000 GeV 2 using the H1 detector at HERA. The data were taken in the years 2003 to 2007 and correspond to an integrated luminosity of 351 pb −1 . Double differential jet cross sections are obtained using a regularised unfolding procedure. They are presented as a function of Q 2 and the transverse momentum of the jet, P

Precise QCD Predictions for the Production of Dijet Final States in Deep Inelastic Scattering

“…Our results are fully differential in the kinematical variables of the final state lepton and the jets. We applied our calculation to the kinematical situation that is relevant to a recent dijet measurement by the H1 Collaboration [6]. Except for jet production at low transverse momentum (where the experimental event selection cuts destabilize the perturbative convergence), we observe the NNLO corrections to be moderate in size and to overlap with the scale uncertainty band of the previously available NLO PRL 117, 042001 (2016) P H Y S I C A L R E V I E W L E T T E R S week ending 22 JULY 2016 042001-3…”

“…Dijet final states have been measured to high precision over a large kinematical range by the H1 [4][5][6] and ZEUS [7,8] experiments, which have also used these measurements in the determination of the strong coupling constant. The reconstruction of jets is performed in the Breit frame, defined by the direction of the virtual photon and incoming proton, while the jet rapidity coverage is limited by the detector's geometry in the laboratory frame.…”

“…[36]) and by the infrared pole cancellation between the integrated subtraction terms and the two-loop matrix elements. As a first application of our calculation, we consider the recent measurement by the H1 Collaboration [6] of dijet production in DIS at high values of virtuality Q 2 . The measurement was performed on data taken at the DESY HERA electron-proton collider at a center-of-mass energy of ffiffi ffi s p ¼ 319 GeV.…”

“…The theoretical predictions are corrected bin by bin for hadronization and electroweak effects using the tables provided in Ref. [6].…”

“…1. Inclusive dijet production in deep inelastic scattering as a function of the average transverse momentum of the two leading jets in the Breit frame at LO, NLO, NNLO, compared to data from the H1 Collaboration [6]. PRL …”