NNLO QCD corrections to jet production in charged current deep inelastic scattering

Abstract

The production of jets in charged current deep inelastic scattering (CC DIS) constitutes a class of observables that can be used to simultaneously test perturbative predictions for the strong and the electroweak sectors of the Standard Model. We compute both single jet and di-jet production in CC DIS for the first time at next-to-next-to-leading order (NNLO) in the strong coupling. Our computation is fully differential in the jet and lepton kinematics, and we observe a substantial reduction of scale variation uncertainties in the NNLO predictions compared to next-to-leading order (NLO). Our calculation will prove essential for full exploitation of data at a possible future LHeC collider.

Jet production in charged-current deep-inelastic scattering to third order in QCD

“…At larger values of x, valence-type quark distributions of the different charges determine the behaviour of the distributions. As noted already for the NNLO case in [21], the agreement with data is systematically better for the e + p than for the e − p case, and can be traced back to a discrepancy in the x-distribution of e − p around x ∼ 0.15, perhaps pointing to a PDF effect.…”

“…The integrated counterterm is exactly equivalent to the radiative contribution to the inclusive cross section which is mapped to the Born phase space during the analytic integration, such that when the three terms in (1) are combined, the fully differential cross section at N k LO is recovered. In this letter we use the NNLO calculation of di-jet production in charged current DIS implemented using antenna subtraction from [21] alongside the inclusive N 3 LO charged current structure functions of [32] in order to produce for the first time differential distributions for single jet production in CC DIS (F = ν + j). These corrections are arXiv:1812.06104v2 [hep-ph] 19 Mar 2019 all implemented in the parton-level Monte Carlo event generator NNLOjet.…”

“…The theory distributions are corrected for hadronisation and QED radiative effects using the multiplicative factors provided in [45]. We validated the P2B implementation up to NNLO against the results using pure antenna subtraction in [21] for e + p scattering for the above cuts, resulting in sub per-mille level agreement (within numerical integration errors) for the NNLO contribution to the cross section: −440.77 ± 0.24 fb (P2B) versus −440.82±0.30 fb (antenna). When combined with the LO and NLO terms, we are confident that we have excellent agreement between the two methods for all choices of renormalisation and factorisation scales.…”

MadFlow: automating Monte Carlo simulation on GPU for particle physics processes

“…Despite the HEP community interest in providing computational tools for experimental setups, we still observe a growing trend towards the increase of computational time required to solve complex problems [2,3] in particular for Monte Carlo (MC) simulation of particle physics processes. Moreover, this growing trend is further increased by the current state of the art implementations of MC simulation libraries, which still today rely almost exclusively, on CPU architecture [4][5][6][7].…”

NNLO QCD Corrections to W+jet Production in NNLO JET

“…Following results for boson production in association with a jet [8,[18][19][20][21][22][23][24] and di-jet production [25][26][27] in proton-proton collisions, di-jet production in neutral current, charged current and diffractive DIS [28][29][30][31] and three-jet production in e + e − -annihilation [32], the process library in NNLOJET has recently been expanded to include Higgs production in vector boson fusion (VBF) in proton-proton collisions [33], and single-jet production to N3LO QCD in NC DIS [34], using the method of Projection-To-Born (P2B).…”