Phenomenology of jet angularities at the LHC

Reichelt, Daniel; Fedkevych, Oleh; Marzani, Simone; Schumann, Steffen; Soyez, Grégory

doi:10.1007/jhep03(2022)131

Cited by 26 publications

(12 citation statements)

References 121 publications

(227 reference statements)

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“…From a phenomenological viewpoint, a dedicated study of hadronisation corrections is required for practical applications to precision physics. In this context, it would be interesting to see if recent approaches either on the analytic front [76], using Monte Carlo techniques [77], or even methods based on Deep-Learning [78], could be helpful.…”

Section: Discussionmentioning

confidence: 99%

Lund and Cambridge multiplicities for precision physics

Medves

Soto-Ontoso²,

Soyez³

2022

J. High Energ. Phys.

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We revisit the calculation of the average jet multiplicity in high-energy collisions. First, we introduce a new definition of (sub)jet multiplicity based on Lund declusterings obtained using the Cambridge jet algorithm. We develop a new systematic resummation approach. This allows us to compute both the Lund and the Cambridge average multiplicities to next-to-next-to-double (NNDL) logarithmic accuracy in electron-positron annihilation, an order higher in accuracy than previous works in the literature. We match our resummed calculation to the exact NLO ($$ \mathcal{O} $$ O ($$ {\alpha}_s^2 $$ α s 2 )) result, showing predictions for the Lund multiplicity at LEP energies with theoretical uncertainties up to 50% smaller than the previous state-of-the-art. Adding hadronisation corrections obtained by Monte Carlo simulations, we also show a good agreement with existing Cambridge multiplicity data. Finally, to highlight the flexibility of our method, we extend the Lund multiplicity calculation to hadronic collisions where we reach next-to-double logarithmic accuracy for colour singlet production.

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Section: Discussionmentioning

confidence: 99%

Lund and Cambridge multiplicities for precision physics

Medves

Soto-Ontoso²,

Soyez³

2022

J. High Energ. Phys.

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show abstract

“…From a phenomenological viewpoint, a dedicated study of hadronisation corrections is required for practical applications to precision physics. In this context, it would be interesting to see if recent approaches either on the analytic front [74], using Monte Carlo techniques [75], or even methods based on Deep-Learning [76], could be helpful.…”

Section: Discussionmentioning

confidence: 99%

Lund and Cambridge multiplicities for precision physics

Medves¹,

Soto-Ontoso²,

Soyez³

2022

Preprint

Self Cite

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We revisit the calculation of the average jet multiplicity in high-energy collisions. First, we introduce a new definition of (sub)jet multiplicity based on Lund declusterings obtained using the Cambridge jet algorithm. We develop a new systematic resummation approach. This allows us to compute both the Lund and the Cambridge average multiplicities to next-to-nextto-double (NNDL) logarithmic accuracy in electron-positron annihilation, an order higher in accuracy than previous works in the literature. We match our resummed calculation to the exact NLO (O α 2 s ) result, showing predictions for the Lund multiplicity at LEP energies with theoretical uncertainties up to 50% smaller than the previous state-of-the-art. Adding hadronisation corrections obtained by Monte Carlo simulations, we also show a good agreement with existing Cambridge multiplicity data. Finally, to highlight the flexibility of our method, we extend the Lund multiplicity calculation to hadronic collisions where we reach next-to-double logarithmic accuracy for colour singlet production.

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“…Several hallmark observables in the field of jet substructure at the LHC have now been extended systematically to NLL and partially NNLL accuracy. Examples include the jet mass [162][163][164][165][166], jet angularities [164,[167][168][169][170][171], the groomed jet radius [172], the momentum sharing fraction z g [159,160], the jet shape [173], the angle between different jet axes [174], the jet pull [175,175,176], and the primary Lund plane [177]. A new jet grooming technique called dynamical grooming has been developed in Ref.…”

Section: Jets and Their Substructurementioning

confidence: 99%

Snowmass 2021 White Paper: Resummation for future colliders

Beekveld¹,

Jaskiewicz²,

Liu³

et al. 2022

Preprint

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Resummation techniques are essential for high-precision phenomenology at current and future high-energy collider experiments. Perturbative computations of cross sections often suffer from large logarithmic corrections, which must be resummed to all orders to restore the reliability of predictions from first principles. The precise understanding of the all-order structure of field theories allows for fundamental tests of the Standard Model and new physics searches. In this white paper, we review recent progress in modern resummation techniques and outline future directions. In particular, we focus on the resummation beyond leading power, the joint resummation of different classes of logarithms relevant for jets and their substructure, small-x resummation in the high-energy regime and the QCD fragmentation process in the small-z h limit.

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Phenomenology of jet angularities at the LHC

Cited by 26 publications

References 121 publications

Lund and Cambridge multiplicities for precision physics

Lund and Cambridge multiplicities for precision physics

Lund and Cambridge multiplicities for precision physics

Snowmass 2021 White Paper: Resummation for future colliders

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