Precise determination of α<sub>S</sub>(
$ m_{Z^0 } $
) from a global fit of energy-energy correlations to NNLO+NNLL predictions

Kardos, Ádám; Kluth, S.; Somogyi, G.; Tulipánt, Zoltán; Verbytskyi, A.

doi:10.1051/epjconf/201920605002

Cited by 12 publications

(37 citation statements)

References 74 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since P (2) qg is part of the singlet time-like splitting kernel matrix governing the logarithmic structure of the EEC in the z → 0 limit [24], the new result for P (2) qg modifies the small angle limit of the Higgs EEC at O(α 3 s ) and beyond. The result in e + e − is not modified since in that case P (2) qg contributes to the z → 0 logarithmic coefficients only 8 The contact terms of the EEC in N = 4 were also obtained in ref. [41].…”

Section: Jhep08(2021)022supporting

confidence: 53%

“…[23] to obtain the endpoint behaviors of the EEC in N = 4 up to three loops. 8 In QCD, it has been applied in ref. [24] to extract V…”

Section: Jhep08(2021)022mentioning

confidence: 99%

“…In the quest of understanding the nature of the strong interaction, the study of QCD radiation produced in high-energy electron-positron collisions provides a powerful lens into the behavior of Quantum Chromodynamics (QCD). Among the observables that one can consider to perform precision studies of QCD radiation, the Energy-Energy Correlation (EEC) [1] stands out for its simplicity, and has been an important benchmark observable to test QCD and to extract the strong coupling constant α s , which has been explored both at LEP and at SLAC [2][3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Energy-Energy Correlation in the back-to-back limit at N3LO and N3LL′

Ebert

Mistlberger

Vita

2021

J. High Energ. Phys.

View full text Add to dashboard Cite

We present the analytic formula for the Energy-Energy Correlation (EEC) in electron-positron annihilation computed in perturbative QCD to next-to-next-to-next-to-leading order (N3LO) in the back-to-back limit. In particular, we consider the EEC arising from the annihilation of an electron-positron pair into a virtual photon as well as a Higgs boson and their subsequent inclusive decay into hadrons. Our computation is based on a factorization theorem of the EEC formulated within Soft-Collinear Effective Theory (SCET) for the back-to-back limit. We obtain the last missing ingredient for our computation — the jet function — from a recent calculation of the transverse-momentum dependent fragmentation function (TMDFF) at N3LO. We combine the newly obtained N3LO jet function with the well known hard and soft function to predict the EEC in the back-to-back limit. The leading transcendental contribution of our analytic formula agrees with previously obtained results in $$ \mathcal{N} $$ N = 4 supersymmetric Yang-Mills theory. We obtain the N = 2 Mellin moment of the bulk region of the EEC using momentum sum rules. Finally, we obtain the first resummation of the EEC in the back-to-back limit at N3LL′ accuracy, resulting in a factor of ∼ 4 reduction of uncertainties in the peak region compared to N3LL predictions.

show abstract

Section: Jhep08(2021)022supporting

confidence: 53%

“…[23] to obtain the endpoint behaviors of the EEC in N = 4 up to three loops. 8 In QCD, it has been applied in ref. [24] to extract V…”

Section: Jhep08(2021)022mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Energy-Energy Correlation in the back-to-back limit at N3LO and N3LL′

Ebert

Mistlberger

Vita

2021

J. High Energ. Phys.

View full text Add to dashboard Cite

show abstract

“…One option for obtaining the hadronization corrections is to extract them from Monte Carlo simulations. Recent examples of this approach include the studies of the energy-energy correlation [36] and the two-jet rate [37]. Some previous extractions of the strong coupling from event shape moments [23,38] and event shape distributions [39] have used an analytic hadronization model based on the dispersive approach to power corrections [40][41][42].…”

Section: Modeling Of Non-perturbative Correctionsmentioning

confidence: 99%

“…In this work we use the Monte Carlo event generation setups similar to those in previous comparable studies [36]. We made use of the Herwig7.2.0 [45] and Sherpa2.2.8 [46] Monte Carlo event generators (MCEGs) with similar setups for perturbative calculations, but different hadronization models.…”

Section: Monte Carlo Hadronization Modelsmentioning

confidence: 99%

Determination of $$\alpha _{S}$$ beyond NNLO using event shape averages

Kardos

Somogyi²,

Verbytskyi

2021

Eur. Phys. J. C

View full text Add to dashboard Cite

We consider a method for determining the QCD strong coupling constant using fits of perturbative predictions for event shape averages to data collected at the LEP, PETRA, PEP and TRISTAN colliders. To obtain highest accuracy predictions we use a combination of perturbative $${{{\mathcal {O}}}}(\alpha _{S}^{3})$$ O ( α S 3 ) calculations and estimations of the $${{{\mathcal {O}}}}(\alpha _{S}^{4})$$ O ( α S 4 ) perturbative coefficients from data. We account for non-perturbative effects using modern Monte Carlo event generators and analytic hadronization models. The obtained results show that the total precision of the $$\alpha _{S}$$ α S determination cannot be improved significantly with the higher-order perturbative QCD corrections alone, but primarily requires a deeper understanding of the non-perturbative effects.

show abstract

Analytic next-to-leading order calculation of energy-energy correlation in gluon-initiated Higgs decays

Luo

Shtabovenko

Yang

et al. 2019

J. High Energ. Phys.

View full text Add to dashboard Cite

The energy-energy correlation (EEC) function in e + e − annihilation is currently the only QCD event shape observable for which we know the full analytic result at the next-to-leading order (NLO). In this work we calculate the EEC observable for gluon initiated Higgs decay analytically at NLO in the Higgs Effective Field Theory (HEFT) framework and provide the full results expressed in terms of classical polylogarithms, including the asymptotic behavior in the collinear and back-to-back limits. This observable can be, in principle, measured at the future e + e − colliders such as CEPC, ILC, FCC-ee or CLIC. It provides an interesting opportunity to simultaneously probe our understanding of the strong and Higgs sectors and can be used for the determinations of the strong coupling.

show abstract

Precise determination of α_S( $ m_{Z^0 } $ ) from a global fit of energy-energy correlations to NNLO+NNLL predictions

Cited by 12 publications

References 74 publications

The Energy-Energy Correlation in the back-to-back limit at N3LO and N3LL′

The Energy-Energy Correlation in the back-to-back limit at N3LO and N3LL′

Determination of $$\alpha _{S}$$ beyond NNLO using event shape averages

Analytic next-to-leading order calculation of energy-energy correlation in gluon-initiated Higgs decays

Contact Info

Product

Resources

About

Precise determination of αS( $ m_{Z^0 } $ ) from a global fit of energy-energy correlations to NNLO+NNLL predictions

Cited by 12 publications

References 74 publications

The Energy-Energy Correlation in the back-to-back limit at N3LO and N3LL′

The Energy-Energy Correlation in the back-to-back limit at N3LO and N3LL′

Determination of $$\alpha _{S}$$ beyond NNLO using event shape averages

Analytic next-to-leading order calculation of energy-energy correlation in gluon-initiated Higgs decays

Contact Info

Product

Resources

About

Precise determination of α_S( $ m_{Z^0 } $ ) from a global fit of energy-energy correlations to NNLO+NNLL predictions