Next-to-leading-logarithmic power corrections for 
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-jettiness subtraction in color-singlet production

Boughezal, Radja; Isgrò, Andrea; Petriello, Francis John

doi:10.1103/physrevd.97.076006

Cited by 82 publications

(112 citation statements)

References 45 publications

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“…We also showed that requiring a substantially harder jet reduces the effect of power corrections considerably and renders the method more competitive. Our calculation demonstrates the importance of a dedicated program to compute the effects of power corrections analytically, as has already been performed for the color-singlet case [12,36,[39][40][41], in order to improve the effectiveness of the N -jettiness method.…”

Section: Discussionmentioning

confidence: 89%

H + 1 jet production revisited

Campbell

Ellis

Seth

2019

J. High Energ. Phys.

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We revisit the next-to-next-to-leading order (NNLO) calculation of the Higgs boson+1 jet production process, calculated in the m t → ∞ effective field theory. We perform a detailed comparison of the result calculated using the jettiness slicing method, with published results obtained using subtraction methods. The results of the jettiness calculation agree with the two previous subtraction calculations at benchmark points. The performance of the jettiness slicing approach is greatly improved by adopting a definition of 1-jettiness that accounts for the boost of the Born system. Nevertheless, the results demonstrate that power corrections in the jettiness slicing method remain significant. At large transverse momentum the effect of power corrections is much reduced, as expected.

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Section: Discussionmentioning

confidence: 89%

H + 1 jet production revisited

Campbell

Ellis

Seth

2019

J. High Energ. Phys.

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“…In this section we analyze the terms that contribute to the NLP-NLL cross section. In the color-singlet case, it was observed [6,7] For processes with one jet in the final state, the NLL power correction are inherently process dependent since they require the subleading collinear matrix elements. It is not unreasonable to assume that, like in the color singlet case, there is a choice of ρ i that reduces the impact of power corrections, avoiding the need to implement NLL contributions.…”

Section: F Nlp-nll Contributionsmentioning

confidence: 99%

Next-to-leading power corrections to V+1 jet production in N -jettiness subtraction

2020

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We discuss the subleading power corrections to one-jet production processes in N -jettiness subtraction using vector-boson plus jet production as an example. We analytically derive the next-to-leading power leading logarithmic corrections (NLP-LL) through O(α S ) in perturbative QCD, and outline the calculation of the next-to-leading logarithmic corrections (NLP-NLL). Our result is differential in the jet transverse momentum and rapidity, and in the vector boson momentum squared and rapidity. We present simple formulae that separate the NLP corrections into universal factors valid for any one-jet cross section and process-dependent matrix-element corrections. We discuss in detail features of the NLP corrections such as the process independence of the leading-logarithmic result that occurs due to the factorization of matrix elements in the subleading soft limit, the occurrence of poles in the non-hemisphere soft function at NLP and the cancellation of potential T 1 /Q corrections to the N -jettiness factorization theorem. We validate our analytic result by comparing them to numerically-fitted coefficients, finding good agreement for both the inclusive and the differential cross sections.arXiv:1907.12213v2 [hep-ph] 6 Aug 2019 separate the power corrections into process-independent terms valid for any one-jet production process and process-dependent matrix element correction factors. Important aspects of our results are summarized below.• We make use of the expansion by regions [32,33] to perform the computation of the cross section. In particular, we split the phase space into two beam regions, a jet region and a soft region.• We show that all NLP-LL corrections at NLO arise from the emission of soft partons, as in the case of color-singlet production [1, 2], and show how to obtain such subleading soft corrections by making use of the subleading soft theorem [34]. This allows us to write the NLP-LL result in a universal form valid for all one-jet processes.• We show that the non-hemisphere soft contributions defined in [35], which are finite at leading power, contribute to poles when extended to next-to-leading power. These poles are necessary for the consistency of the result at NLP.• We demonstrate the cancellation of potential power corrections suppressed only by T /Q, where T is the one-jettiness event shape variable and Q is a generic hard scale.Our paper is organized as follows. In Section II we discuss the Born-level process for V + j production and introduce the notation used in the remainder of the manuscript. We discuss our strategy for the computation of the NLP corrections in Section III, and illustrate the separation of the phase space into different regions. In Section IV, we write down a general expression for the phase space that is valid in every region, separating the case where the two final-state partons are measured as two separate jets from the case where they are part of the same jet.We then proceed to expand the phase space in each region, listing all the relevant expansion coefficients in t...

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“…Even if not, elucidation of NLP contributions at a fixed order in α s may have a key role to play in estimating higher order cross-sections. It can furthermore aid in the development of subtraction schemes for the efficient numerical cancellation of infrared singularities [19,20].…”

Section: Introductionmentioning

confidence: 99%

“…[26][27][28][29][30], and results using the diagrammatic approach are in progress [51]. The various approaches have also been used to examine NLP effects at fixed order in the coupling [19,20,[52][53][54]. Of particular relevance for the present study is Ref.…”

Section: Introductionmentioning

confidence: 99%

Next-to-leading power threshold effects for inclusive and exclusive processes with final state jets

Beekveld

Beenakker

Laenen

et al. 2020

J. High Energ. Phys.

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It is well known that cross-sections in perturbative QCD receive large corrections from soft and collinear radiation, whose properties must be resummed to all orders in the coupling. Whether or not the universal properties of this radiation can be extended to next-to-leading power (NLP) in the threshold expansion has been the subject of much recent study. In this paper, we consider two types of NLP effects: the interplay of next-to-soft and collinear radiation in processes with final state jets and the NLP contributions stemming from soft quarks. We derive an NLP amplitude for soft gluons and quarks, valid for an arbitrary number of coloured or colourless massless final state particles. We show explicitly that this framework can be used to correctly obtain the dominant NLP effects in three different types of processes at next-to-leading order: deep-inelastic scattering, hadroproduction via electron-positron annihilation and prompt photon production. Our results provide an important ingredient for developing a universal resummation formalism for NLP effects.

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Next-to-leading-logarithmic power corrections for N -jettiness subtraction in color-singlet production

Cited by 82 publications

References 45 publications

H + 1 jet production revisited

H + 1 jet production revisited

Next-to-leading power corrections to V+1 jet production in N -jettiness subtraction

Next-to-leading power threshold effects for inclusive and exclusive processes with final state jets

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