skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Fitting the strong coupling constant with soft-drop thrust

Abstract

Soft drop has been shown to reduce hadronisation effects at $e^+e^-$ colliders for the thrust event shape. In this context, we perform fits of the strong coupling constant for the soft-drop thrust distribution at NLO+NLL accuracy to pseudo data generated by the Sherpa event generator. In particular, we focus on the impact of hadronisation corrections, which we estimate both with an analytical model and a Monte-Carlo based one, on the fitted value of $$\alpha_s(m_Z)$$. We find that grooming can reduce the size of the shift in the fitted value of $$\alpha_s$$ due to hadronisation. In addition, we also explore the possibility of extending the fitting range down to significantly lower values of (one minus) thrust. Here, soft drop is shown to play a crucial role, allowing us to maintain good fit qualities and stable values of the fitted strong coupling. The results of these studies show that soft-drop thrust is a promising candidate for fitting $$\alpha_s$$ at $e^+ e^-$ colliders with reduced impact of hadronisation effects.

Authors:
 [1];  [2];  [3];  [4];  [5]
+ Show Author Affiliations
  1. Univ. di Genova (Italy). Dept. di Fisica
  2. Georg-August-Univ. at Göttingen (Germany). Inst. für Theoretische Physik; Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  3. Georg-August-Univ. at Göttingen (Germany). Inst. für Theoretische Physik
  4. Paris Saclay Univ., Gif-sur-Yvette (France). Inst. de Physique Théorique
  5. Georg-August-Univ. at Göttingen (Germany). Inst. für Theoretische Physik; Paris Saclay Univ., Gif-sur-Yvette (France). Inst. de Physique Théorique
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1546010
Report Number(s):
arXiv:1906.10504; FERMILAB-PUB-19-266-T; MCNET-19-14
Journal ID: ISSN 1029-8479; oai:inspirehep.net:1741249
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2019; Journal Issue: 11; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; jets; QCD phenomenology

Citation Formats

Marzani, Simone, Reichelt, Daniel, Schumann, Steffen, Soyez, Gregory, and Theeuwes, Vincent. Fitting the strong coupling constant with soft-drop thrust. United States: N. p., 2019. Web. doi:10.1007/JHEP11(2019)179.
Copy to clipboard
Marzani, Simone, Reichelt, Daniel, Schumann, Steffen, Soyez, Gregory, & Theeuwes, Vincent. Fitting the strong coupling constant with soft-drop thrust. United States. doi:10.1007/JHEP11(2019)179.
Copy to clipboard
Marzani, Simone, Reichelt, Daniel, Schumann, Steffen, Soyez, Gregory, and Theeuwes, Vincent. Fri . "Fitting the strong coupling constant with soft-drop thrust". United States. doi:10.1007/JHEP11(2019)179. https://www.osti.gov/servlets/purl/1546010.
Copy to clipboard
@article{osti_1546010,
title = {Fitting the strong coupling constant with soft-drop thrust},
author = {Marzani, Simone and Reichelt, Daniel and Schumann, Steffen and Soyez, Gregory and Theeuwes, Vincent},
abstractNote = {Soft drop has been shown to reduce hadronisation effects at $e^+e^-$ colliders for the thrust event shape. In this context, we perform fits of the strong coupling constant for the soft-drop thrust distribution at NLO+NLL accuracy to pseudo data generated by the Sherpa event generator. In particular, we focus on the impact of hadronisation corrections, which we estimate both with an analytical model and a Monte-Carlo based one, on the fitted value of $\alpha_s(m_Z)$. We find that grooming can reduce the size of the shift in the fitted value of $\alpha_s$ due to hadronisation. In addition, we also explore the possibility of extending the fitting range down to significantly lower values of (one minus) thrust. Here, soft drop is shown to play a crucial role, allowing us to maintain good fit qualities and stable values of the fitted strong coupling. The results of these studies show that soft-drop thrust is a promising candidate for fitting $\alpha_s$ at $e^+ e^-$ colliders with reduced impact of hadronisation effects.},
doi = {10.1007/JHEP11(2019)179},
journal = {Journal of High Energy Physics (Online)},
number = 11,
volume = 2019,
place = {United States},
year = {2019},
month = {11}
}
Copy to clipboard
Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI:  10.1007/JHEP11(2019)179
Copyright Statement
Other availability
Search WorldCat Search WorldCat to find libraries that may hold this journal
Save / Share:
Export Metadata
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.

Works referenced in this record:

Review of Particle Physics
journal, August 2018

Strong Running Coupling at τ and Z 0 Mass Scales from Lattice QCD
journal, June 2012

Determination of the strong coupling constant using matched NNLO+NLLA predictions for hadronic event shapes in e + e − annihilations
journal, August 2009

Precise Determination of the Strong Coupling Constant at NNLO in QCD from the Three-Jet Rate in Electron–Positron Annihilation at LEP
journal, February 2010

Non-perturbative contribution to the thrust distribution in e + e − annihilation
journal, December 2008

Power corrections in the dispersive model for a determination of the strong coupling constant from the thrust distribution
journal, January 2013

Quantum Chromodynamics Test for Jets
journal, December 1977

Soft-drop thrust
journal, August 2018

  • Baron, Jeremy; Marzani, Simone; Theeuwes, Vincent
  • Journal of High Energy Physics, Vol. 2018, Issue 8
  • DOI: 10.1007/JHEP08(2018)105

Soft drop
journal, May 2014

  • Larkoski, Andrew J.; Marzani, Simone; Soyez, Gregory
  • Journal of High Energy Physics, Vol. 2014, Issue 5
  • DOI: 10.1007/JHEP05(2014)146

Jet Substructure as a New Higgs-Search Channel at the Large Hadron Collider
journal, June 2008

Towards an understanding of jet substructure
journal, September 2013

  • Dasgupta, Mrinal; Fregoso, Alessandro; Marzani, Simone
  • Journal of High Energy Physics, Vol. 2013, Issue 9
  • DOI: 10.1007/JHEP09(2013)029

FastJet user manual: (for version 3.0.2)
journal, March 2012

Factorization for groomed jet substructure beyond the next-to-leading logarithm
journal, July 2016

  • Frye, Christopher; Larkoski, Andrew J.; Schwartz, Matthew D.
  • Journal of High Energy Physics, Vol. 2016, Issue 7
  • DOI: 10.1007/JHEP07(2016)064

A study of jet mass distributions with grooming
journal, July 2017

  • Marzani, Simone; Schunk, Lais; Soyez, Gregory
  • Journal of High Energy Physics, Vol. 2017, Issue 7
  • DOI: 10.1007/JHEP07(2017)132

Soft evolution of multi-jet final states
journal, February 2015

  • Gerwick, Erik; Schumann, Steffen; Höche, Stefan
  • Journal of High Energy Physics, Vol. 2015, Issue 2
  • DOI: 10.1007/JHEP02(2015)106

Phenomenology of event shapes at hadron colliders
journal, June 2010

  • Banfi, Andrea; Salam, Gavin P.; Zanderighi, Giulia
  • Journal of High Energy Physics, Vol. 2010, Issue 6
  • DOI: 10.1007/JHEP06(2010)038

Resummation of large logarithms in e+e− event shape distributions
journal, October 1993

A parton shower algorithm based on Catani-Seymour dipole factorisation
journal, March 2008

A critical appraisal of NLO+PS matching methods
journal, September 2012

  • Höche, Stefan; Krauss, Frank; Schönherr, Marek
  • Journal of High Energy Physics, Vol. 2012, Issue 9
  • DOI: 10.1007/JHEP09(2012)049

QCD matrix elements + parton showers. The NLO case
journal, April 2013

  • Höche, Stefan; Krauss, Frank; Schönherr, Marek
  • Journal of High Energy Physics, Vol. 2013, Issue 4
  • DOI: 10.1007/JHEP04(2013)027

Scattering Amplitudes with Open Loops
journal, March 2012

The Lund Monte Carlo for jet fragmentation
journal, September 1982

Rivet user manual
journal, December 2013

  • Buckley, Andy; Butterworth, Jonathan; Grellscheid, David
  • Computer Physics Communications, Vol. 184, Issue 12
  • DOI: 10.1016/j.cpc.2013.05.021

NLO QCD matrix elements + parton showers in e+e− → hadrons
journal, January 2013

  • Gehrmann, Thomas; Höche, Stefan; Krauss, Frank
  • Journal of High Energy Physics, Vol. 2013, Issue 1
  • DOI: 10.1007/JHEP01(2013)144

Momentum conservation and unitarity in parton showers and NLL resummation
journal, January 2018

  • Höche, Stefan; Reichelt, Daniel; Siegert, Frank
  • Journal of High Energy Physics, Vol. 2018, Issue 1
  • DOI: 10.1007/JHEP01(2018)118

Herwig++ physics and manual
journal, November 2008

The midpoint between dipole and parton showers
journal, September 2015

General-purpose event generators for LHC physics
journal, July 2011

Non-perturbative QCD effects in jets at hadron colliders
journal, February 2008

The jet mass distribution after Soft Drop
journal, February 2018

A general method for the resummation of event-shape distributions in e + e − annihilation
journal, May 2015

  • Banfi, Andrea; McAslan, Heather; Monni, Pier Francesco
  • Journal of High Energy Physics, Vol. 2015, Issue 5
  • DOI: 10.1007/JHEP05(2015)102

QCD coherent branching and semi-inclusive processes at large χ
journal, February 1991

A QCD model for jet fragmentation including soft gluon interference
journal, June 1984

Colour reconnections in Herwig++
journal, November 2012

Improving the simulation of quark and gluon jets with Herwig 7
journal, December 2017

Interleaved parton showers and tuning prospects
journal, March 2011

  • Corke, Richard; Sjöstrand, Torbjörn
  • Journal of High Energy Physics, Vol. 2011, Issue 3
  • DOI: 10.1007/JHEP03(2011)032
    [ × clear filter / sort ]

    Similar records in OSTI.GOV collections: