Azimuthal correlations of high transverse momentum jets at next-to-leading order in the parton branching method

Abdulhamid, M. I.; Al-Mashad, M. A.; Martinez, A. Bermudez; Bonomelli, G.; Bubanja, I.; Crnkovic, N.; Colombina, F.; D'Anzi, B.; Cerci, S.; Davydov, M.; Banos, L. I. Estevez; Forzano, N.; Hautmann, F.; Jung, H.; Kim, S.; Quiros, A. Leon; Martins, D. E.; Mendizabal, M.; Figueroa, K. Moral; Prestel, S.; Monfared, S. Taheri; Süslü, C.; Cerci, D. Sunar; van Kampen, A. M.; Van Mechelen, P.; Verbytskyi, A.; Wang, Q.; Yang, H.; Zhou, Y.

doi:10.48550/arxiv.2112.10465

Cited by 6 publications

(21 citation statements)

References 50 publications

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“…2 and discussed in detail in Ref. [14]. Only in the very high p leading T region, a deviation from the measurement is observed, which could be perhaps interpreted as coming from a violation of factorization.…”

Section: Back-to-back Azimuthal Correlations In Z+jet and Multijet Pr...mentioning

confidence: 89%

“…The extension to multijet production is illustrated in Ref. [14]. Predictions are obtained by processing the MADGRAPH5_AMC@NLO event files in LHE format [35] through CAS-CADE3 [34] for an inclusion of TMD effects in the initial state and for simulation of the corresponding parton shower (labeled MCatNLO+CAS3 in the following).…”

Section: Calculation Of Z+jet Distributionsmentioning

confidence: 99%

“…Fixed order NLO Z+jet production is calculated with MADGRAPH5_AMC@NLO in a procedure similar to the one applied for dijet production described in [14] (labeled MCatNLO(fNLO)). For the MC@NLO mode, the HERWIG6 [36,37] subtraction terms are calculated, as they are best suited for the use with PB -parton densities, because both apply the same angular ordering condition.…”

Section: Calculation Of Z+jet Distributionsmentioning

confidence: 99%

“…In a previous publication [14] we have investigated the ∆φ 12 correlation in high-p T dijet events by applying TMD PDFs and parton shower together with NLO calculations of the hard scattering process. The application of TMD PDFs allows a direct investigation of initial state parton radiation (an overview on TMD PDFs is given in Ref.…”

Section: Introductionmentioning

confidence: 99%

“…In Ref. [14] these PB TMD PDFs were applied to multijet production at large transverse momenta. We apply the same method to the calculation of Z+jet production.…”

Section: Introductionmentioning

confidence: 99%

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Back-to-back azimuthal correlations in Z+jet events at high transverse momentum in the TMD parton branching method at next-to-leading order

Yang¹,

Martínez²,

Banos³

et al. 2022

Preprint

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Azimuthal correlations in Z+jet production at large transverse momenta are computed by matching Parton -Branching (PB) TMD parton distributions and showers with NLO calculations via MCatNLO. The predictions are compared with those for dijet production in the same kinematic range. The azimuthal correlations ∆φ between the Z boson and the leading jet are steeper compared to those in dijet production at transverse momenta O(100) GeV, while they become similar for very high transverse momenta O(1000) GeV. The different patterns of Z+jet and dijet azimuthal correlations can be used to search for potential factorization -breaking effects in the back-to-back region, which depend on the different color and spin structure of the final states and their interferences with the initial states. In order to investigate these effects experimentally, we propose to measure the ratio of the distributions in ∆φ for Z+jet-and multijet production at low and at high transverse momenta, and compare the results to predictions obtained assuming factorization. We examine the role of theoretical uncertainties by performing variations of the factorization scale, renormalization scale and matching scale. In particular, we present a comparative study of matching scale uncertainties in the cases of PB-TMD and collinear parton showers.

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Section: Back-to-back Azimuthal Correlations In Z+jet and Multijet Pr...mentioning

confidence: 89%

Section: Calculation Of Z+jet Distributionsmentioning

confidence: 99%

Section: Calculation Of Z+jet Distributionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…In Ref. [14] these PB TMD PDFs were applied to multijet production at large transverse momenta. We apply the same method to the calculation of Z+jet production.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Back-to-back azimuthal correlations in Z+jet events at high transverse momentum in the TMD parton branching method at next-to-leading order

Yang¹,

Martínez²,

Banos³

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

Multi-jet merging with TMD parton branching

Martínez

Hautmann

Mangano

2022

J. High Energ. Phys.

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One of the main theoretical systematic uncertainties in studies of final states with large jet multiplicities at high-energy hadron colliders is associated with the merging of QCD parton showers and hard-scattering matrix elements. We present a method to incorporate the physics of transverse momentum recoils due to initial-state shower evolution into multi-jet merging algorithms by using the concept of transverse momentum dependent (TMD) distributions and the associated parton branching. We investigate the dependence on the merging scale and illustrate the impact of the new method at the level of both exclusive and inclusive final-state observables by studying differential jet rates, transverse momentum spectra and multiplicity distributions, using vector boson + jets events at the LHC as a case study.

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Back-to-back azimuthal correlations in $$\mathrm {Z} +$$jet events at high transverse momentum in the TMD parton branching method at next-to-leading order

et al. 2022

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Azimuthal correlations in $$\mathrm {Z} +$$ Z + jet production at large transverse momenta are computed by matching Parton-Branching (PB) TMD parton distributions and showers with NLO calculations via MCatNLO. The predictions are compared with those for dijet production in the same kinematic range. The azimuthal correlations $$\Delta \phi $$ Δ ϕ between the Z boson and the leading jet are steeper compared to those in dijet production at transverse momenta $$\mathcal{O}(100)$$ O ( 100 ) GeV , while they become similar for very high transverse momenta $${{\mathcal {O}}}(1000)$$ O ( 1000 ) GeV . The different patterns of $$\mathrm {Z} +$$ Z + jet and dijet azimuthal correlations can be used to search for potential factorization-breaking effects in the back-to-back region, which depend on the different color and spin structure of the final states and their interferences with the initial states. In order to investigate these effects experimentally, we propose to measure the ratio of the distributions in $$\Delta \phi $$ Δ ϕ for $$\mathrm {Z} +$$ Z + jet- and multijet production at low and at high transverse momenta, and compare the results to predictions obtained assuming factorization. We examine the role of theoretical uncertainties by performing variations of the factorization scale, renormalization scale and matching scale. In particular, we present a comparative study of matching scale uncertainties in the cases of PB-TMD and collinear parton showers.

show abstract

Azimuthal correlations of high transverse momentum jets at next-to-leading order in the parton branching method

Cited by 6 publications

References 50 publications

Back-to-back azimuthal correlations in Z+jet events at high transverse momentum in the TMD parton branching method at next-to-leading order

Back-to-back azimuthal correlations in Z+jet events at high transverse momentum in the TMD parton branching method at next-to-leading order

Multi-jet merging with TMD parton branching

Back-to-back azimuthal correlations in $$\mathrm {Z} +$$jet events at high transverse momentum in the TMD parton branching method at next-to-leading order

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