Predictions for energy correlators probing substructure of groomed heavy quark jets

Lee, Christopher; Shrivastava, Prashant; Vaidya, Varun

doi:10.1007/jhep09(2019)045

Cited by 30 publications

(25 citation statements)

References 91 publications

(167 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[62] and e (α) 2 for bottom quarks in Ref. [63]. So far, either Monte Carlo hadronization models, models based on scaling from single gluon emission, or naive analytical shape functions have been used to estimate hadronization corrections for these observables, and no attempt has been made at obtaining a rigorous operator based description of hadronization corrections after jet grooming.…”

Section: Contentsmentioning

confidence: 99%

“…Scaling results based on the kinematics of single gluon emission in soft drop were considered in Refs. [50,64], and shape function models for soft drop hadronization corrections have been employed for jet angularities [55], D 2 [57,65], and heavy quark induced jets [62,63].…”

Section: Contentsmentioning

confidence: 99%

“…In Ref. [63] the angularity a = 1.5 was considered where the collinear mode becomes nonperturbative before the collinear-soft modes do. In this case our conclusions from the jet mass analysis do not apply.…”

Section: Comparison With Previous Workmentioning

confidence: 99%

See 2 more Smart Citations

Nonperturbative corrections to soft drop jet mass

Hoang

Mantry

Pathak

et al. 2019

J. High Energ. Phys.

View full text Add to dashboard Cite

We provide a quantum field theory based description of the nonperturbative effects from hadronization for soft drop groomed jet mass distributions using the soft-collinear effective theory and the coherent branching formalism. There are two distinct regions of jet mass m J where grooming modifies hadronization effects. In a region with intermediate m J an operator expansion can be used, and the leading power corrections are given by three universal nonperturbative parameters that are independent of all kinematic variables and grooming parameters, and only depend on whether the parton initiating the jet is a quark or gluon. The leading power corrections in this region cannot be described by a standard normalized shape function. These power corrections depend on the kinematics of the subjet that stops soft drop through short distance coefficients, which encode a perturbatively calculable dependence on the jet transverse momentum, jet rapidity, and on the soft drop grooming parameters z cut and β. Determining this dependence requires a resummation of large logarithms, which we carry out at LL order. For smaller m J there is a nonperturbative region described by a one-dimensional shape function that is unusual because it is not normalized to unity, and has a non-trivial dependence on β. A Measurement Operator for the Boundary Term 62 B Collinear-Soft Function with a Probe Nonperturbative Gluon 64 B.1 Analysis with One Perturbative Gluon 64 B.2 Analysis with Two Perturbative Emissions 67 -1 -soft drop operator expansion (SDOE) region: QΛ QCD m 2 J m 2 J QQ cut 1 2+β Figure 2. Pythia prediction for m 2 J /E 2 J distribution indicating three different regions of the spectrum. Here we take R ee 0 = π 2 and the inequality " " in the "p + cs p + Λ " constraint for the SDOE region is replaced by a factor of 5.In Fig. 2 we show a Pythia8 Monte Carlo prediction for this groomed jet mass spectrum with z cut = 0.1 and β = 2. We distinguish three relevant regions of the spectrum: the soft drop nonperturbative region (SDNP) to the far left (left of the magenta dashed line), the soft drop operator expansion region (SDOE) in the middle (between the dashed lines), and the ungroomed resummation region on the far right where soft drop turns off but the log resummation for the ungroomed case is still active (right of the green dashed line). The distinction between the SDNP and SDOE regions is determined by Eq. (1.1), while the distinction between the SDOE and ungroomed resummation region is given by soft drop operator expansion (SDOE):ungroomed resummation region:For the hemisphere case in e + e − one has R = π/2. For R = 1, in the e + e − case this boundary roughly corresponds to m 2 J /E 2 J = z cut which we use in Fig. 2. In all three of these regions the resummation of large logarithms is important, though the precise nature of this resummation is different. There is an additional transition between resummation and fixed-order regions which occurs on the very far right of Fig. 2, near where dσ/dm J goes to zero (not indicated in th...

show abstract

Section: Contentsmentioning

confidence: 99%

Section: Contentsmentioning

confidence: 99%

See 1 more Smart Citation

Nonperturbative corrections to soft drop jet mass

Hoang

Mantry

Pathak

et al. 2019

J. High Energ. Phys.

View full text Add to dashboard Cite

show abstract

“…In this work, we focus on the soft drop grooming algorithm of [4]. Both on the experimental [5][6][7][8] and the theoretical side [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24], significant progress has been made recently in improving our understanding of soft drop groomed jet observables. In the heavy-ion community, soft drop groomed jet substructure observables have also received increasing attention from both experiment [25][26][27][28] and theory [29][30][31][32][33][34][35][36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

The soft drop groomed jet radius at NLL

Kang

Lee

Liu

et al. 2020

J. High Energ. Phys.

View full text Add to dashboard Cite

We present results for the soft drop groomed jet radius R g at next-to-leading logarithmic accuracy. The radius of a groomed jet which corresponds to the angle between the two branches passing the soft drop criterion is one of the characteristic observables relevant for the precise understanding of groomed jet substructure. We establish a factorization formalism that allows for the resummation of all relevant large logarithms, which is based on demonstrating the all order equivalence to a jet veto in the region between the boundaries of the groomed and ungroomed jet. Non-global logarithms including clustering effects due to the Cambridge/Aachen algorithm are resummed to all orders using a suitable Monte Carlo algorithm. We perform numerical calculations and find a very good agreement with Pythia 8 simulations. We provide theoretical predictions for the LHC and RHIC.

show abstract

“…Phenomenological results give a good description of the LHC experimental measurements with improved control over theoretical uncertainties. Effective field theories for heavy jet substructure are also being developed, first in p+p collisions [15]. This serves as a motivation to revisit and further improve the Altarelli-Parisi splitting functions in nuclear matter that are the key ingredients in high-precision calculations in the theory of strong interactions and in Monte-Carlo event generators for heavy ion physics [16].…”

Section: Introductionmentioning

confidence: 99%

Aspects of heavy flavor jet physics in heavy ion collisions

Vitev¹

2019

Proceedings of 13th International Workshop in High pT Physics in the RHIC and LHC Era — PoS(High-pT2019)

View full text Add to dashboard Cite

In these proceedings I discuss several recent developments in the physics of heavy flavor jets in heavy ion collisions. i) The dijet mass modification in nucleus-nucleus reactions has been proposed as a new observable with enhanced sensitivity to parton energy loss in nuclear matter. It also enables more precise studies of heavy quark mass effects on parton shower formation. ii) Computational techniques from soft-collinear effective theory have allowed us to bridge the gap between high energy and heavy ion QCD phenomenology. I show the first application of the semiinclusive jet function formalism to heavy flavor jet production in proton-nucleus and nucleusnucleus collisions at the LHC. iii) Last but not least, central to the theoretical calculations of heavy flavor jets is the accurate theoretical description of in-medium parton showers. A formalism to compute branching processes in nuclear matter to any desired order in opacity has been developed and illustrative numerical results are presented.

show abstract

Predictions for energy correlators probing substructure of groomed heavy quark jets

Cited by 30 publications

References 91 publications

Nonperturbative corrections to soft drop jet mass

Nonperturbative corrections to soft drop jet mass

The soft drop groomed jet radius at NLL

Aspects of heavy flavor jet physics in heavy ion collisions

Contact Info

Product

Resources

About