High precision predictions for exclusive V H production at the LHC

Li, Ye; Liu, Xiaohui

doi:10.1007/jhep06(2014)028

Cited by 27 publications

(26 citation statements)

References 72 publications

(134 reference statements)

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“…Their explicit expressions read The coefficients c R ij in eq. (2.27) are the (in principle known) coefficients of ln R in the η cut -independent two-loop beam function [13,19], which we also verified. 2 They satisfy 30) and are given by…”

Section: Regime 2: P Cutsupporting

confidence: 77%

“…These logarithms dominate the perturbative series when p cut T Q, and represent an important source of theory uncertainty [2,3]. They can be systematically resummed to improve the perturbative predictions and assess the associated uncertainties, which has been well-developed in Drell-Yan and Higgs production [2,[4][5][6][7][8][9][10][11][12][13][14][15][16][17], and has also been applied to several other color-singlet processes [1,[18][19][20][21][22][23][24][25].…”

Section: Contentsmentioning

confidence: 99%

“…The building blocks on the right, together with the gluon-to-quark case, are given by These expressions agree with the color-stripped convolutions given in refs. [13,19], accounting for different conventions for splitting functions. The two-loop finite terms in eq.…”

Section: A2 Beam Function Master Formula For η Cut → ∞mentioning

confidence: 99%

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Jet veto resummation with jet rapidity cuts

Michel

Pietrulewicz

Tackmann

2019

J. High Energ. Phys.

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Jet vetoes are widely used in experimental analyses at the LHC to distinguish different hard-interaction processes. Experimental jet selections require a cut on the (pseudo)rapidity of reconstructed jets, |η jet | ≤ η cut . We extend the standard jet-p T (jet-veto) resummation, which implicitly works in the limit η cut → ∞, by incorporating a finite jet rapidity cut. We also consider the case of a step in the required p cut T at an intermediate value of |η| 2.5, which is of experimental relevance to avoid the increased pile-up contamination beyond the reach of the tracking detectors. We identify all relevant parametric regimes, discuss their factorization and resummation as well as the relations between them, and show that the phenomenologically relevant regimes are free of large nonglobal logarithms. The η cut dependence of all resummation ingredients is computed to the same order to which they are currently known for η cut → ∞. Our results pave the way for carrying out the jet-veto resummation including a sharp cut or a step at η cut to the same order as is currently available in the η cut → ∞ limit. The numerical impact of the jet rapidity cut is illustrated for benchmark qq and gg initiated color-singlet processes at NLL +NLO. We find that a rapidity cut at high η cut = 4.5 is safe to use and has little effect on the cross section. A sharp cut at η cut = 2.5 can in some cases lead to a substantial increase in the perturbative uncertainties, which can be mitigated by instead using a step in the veto.

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Section: Regime 2: P Cutsupporting

confidence: 77%

Section: Contentsmentioning

confidence: 99%

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Jet veto resummation with jet rapidity cuts

Michel

Pietrulewicz

Tackmann

2019

J. High Energ. Phys.

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“…(1.1) can be systematically summed up to all orders in α s . This resummation for jet vetoes in hadronic collisions has been well-developed in the context of Drell-Yan and Higgs production [14,[16][17][18][19][20][21][22][23][24][25][26][27][28][29], and the same methods have also been used to study diboson processes [30][31][32][33][34][35].…”

Section: Jhep07(2016)119mentioning

confidence: 99%

Impact of jet veto resummation on slepton searches

Tackmann

Waalewijn

Zeune

2016

J. High Energ. Phys.

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Several searches for new physics at the LHC require a fixed number of signal jets, vetoing events with additional jets from QCD radiation. As the probed scale of new physics gets much larger than the jet-veto scale, such jet vetoes strongly impact the QCD perturbative series, causing nontrivial theoretical uncertainties. We consider slepton pair production with 0 signal jets, for which we perform the resummation of jet-veto logarithms and study its impact. Currently, the experimental exclusion limits take the jet-veto cut into account by extrapolating to the inclusive cross section using parton shower Monte Carlos. Our results indicate that the associated theoretical uncertainties can be large, and when taken into account have a sizeable impact already on present exclusion limits. This is improved by performing the resummation to higher order, which allows us to obtain accurate predictions even for high slepton masses. For the interpretation of the experimental results to benefit from improved theory predictions, it would be useful for the experimental analyses to also provide limits on the unfolded visible 0-jet cross section.

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“…Analytic resummations of threshold and jet-veto logarithms have been extensively discussed in Refs. [13][14][15][16]. Next-to-leading order (NLO) electroweak (EW) corrections have been presented in Refs.…”

Section: Introductionmentioning

confidence: 99%

Higgsstrahlung at NNLL′+NNLO matched to parton showers in GENEVA

et al. 2019

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We present results for the Higgsstrahlung process within the Geneva Monte Carlo framework. We combine the fully differential NNLO calculation with the higher-order resummation in the 0-jettiness resolution variable (beam thrust). The resulting parton-level events are further showered and hadronised by Pythia8. The beam thrust resummation is carried out to NNLL accuracy, which consistently incorporates all singular virtual and real NNLO corrections. It thus provides a natural perturbative connection between the NNLO calculation and the parton shower regime, including a systematic assessment of perturbative uncertainties. In this way, observables which are inclusive over the additional radiation are correct to NNLO, while the description of 0-jet-like resummation variables is improved beyond the parton shower approximation. We provide predictions for the 13 TeV LHC. THEORETICAL FRAMEWORKThe theoretical framework of our calculation is based on the Geneva method, which has been developed in Refs. [23,[28][29][30]. While we report in the following all the necessary ingredients for the specific Higgsstrahlung process under investigation, we refer the interested readers to the original papers where the derivations of the results used here are presented in greater detail.

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High precision predictions for exclusive V H production at the LHC

Cited by 27 publications

References 72 publications

Jet veto resummation with jet rapidity cuts

Jet veto resummation with jet rapidity cuts

Impact of jet veto resummation on slepton searches

Higgsstrahlung at NNLL′+NNLO matched to parton showers in GENEVA

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