Fitting the strong coupling constant with soft-drop thrust

Marzani, Simone; Reichelt, Daniel; Schumann, Steffen; Soyez, Gregory; Theeuwes, Vincent

doi:10.1007/JHEP11(2019)179

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

Journal Article · 28 November 2019 · Journal of High Energy Physics (Online)

DOI: https://doi.org/10.1007/JHEP11(2019)179 · OSTI ID:1546010

Marzani, Simone ^[1]; Reichelt, Daniel ^[2]; Schumann, Steffen ^[3]; Soyez, Gregory ^[4]; Theeuwes, Vincent ^[5]

Univ. di Genova (Italy). Dept. di Fisica
Georg-August-Univ. at Göttingen (Germany). Inst. für Theoretische Physik; Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Georg-August-Univ. at Göttingen (Germany). Inst. für Theoretische Physik
Paris Saclay Univ., Gif-sur-Yvette (France). Inst. de Physique Théorique
Georg-August-Univ. at Göttingen (Germany). Inst. für Theoretische Physik; Paris Saclay Univ., Gif-sur-Yvette (France). Inst. de Physique Théorique

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.

View Accepted Manuscript (DOE)

Cite

Export

Save

Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Grant/Contract Number:: AC02-07CH11359

OSTI ID:: 1546010

Report Number(s):: FERMILAB-PUB--19-266-T; MCNET--19-14; arXiv:1906.10504; oai:inspirehep.net:1741249

Journal Information:: Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 11 Vol. 2019; ISSN 1029-8479

Publisher:: Springer BerlinCopyright Statement

Country of Publication:: United States

Language:: English

References (56)

NLO QCD matrix elements + parton showers in e+e− → hadrons Gehrmann, Thomas; Höche, Stefan; Krauss, Frank Journal of High Energy Physics, Vol. 2013, Issue 1 https://doi.org/10.1007/JHEP01(2013)144	journal	January 2013
Momentum conservation and unitarity in parton showers and NLL resummation Höche, Stefan; Reichelt, Daniel; Siegert, Frank Journal of High Energy Physics, Vol. 2018, Issue 1 https://doi.org/10.1007/JHEP01(2018)118	journal	January 2018
Soft evolution of multi-jet final states Gerwick, Erik; Schumann, Steffen; Höche, Stefan Journal of High Energy Physics, Vol. 2015, Issue 2 https://doi.org/10.1007/JHEP02(2015)106	journal	February 2015
Interleaved parton showers and tuning prospects Corke, Richard; Sjöstrand, Torbjörn Journal of High Energy Physics, Vol. 2011, Issue 3 https://doi.org/10.1007/JHEP03(2011)032	journal	March 2011
QCD matrix elements + parton showers. The NLO case Höche, Stefan; Krauss, Frank; Schönherr, Marek Journal of High Energy Physics, Vol. 2013, Issue 4 https://doi.org/10.1007/JHEP04(2013)027	journal	April 2013
Soft drop Larkoski, Andrew J.; Marzani, Simone; Soyez, Gregory Journal of High Energy Physics, Vol. 2014, Issue 5 https://doi.org/10.1007/JHEP05(2014)146	journal	May 2014
A general method for the resummation of event-shape distributions in e + e − annihilation Banfi, Andrea; McAslan, Heather; Monni, Pier Francesco Journal of High Energy Physics, Vol. 2015, Issue 5 https://doi.org/10.1007/JHEP05(2015)102	journal	May 2015
Phenomenology of event shapes at hadron colliders Banfi, Andrea; Salam, Gavin P.; Zanderighi, Giulia Journal of High Energy Physics, Vol. 2010, Issue 6 https://doi.org/10.1007/JHEP06(2010)038	journal	June 2010
Factorization for groomed jet substructure beyond the next-to-leading logarithm Frye, Christopher; Larkoski, Andrew J.; Schwartz, Matthew D. Journal of High Energy Physics, Vol. 2016, Issue 7 https://doi.org/10.1007/JHEP07(2016)064	journal	July 2016
A study of jet mass distributions with grooming Marzani, Simone; Schunk, Lais; Soyez, Gregory Journal of High Energy Physics, Vol. 2017, Issue 7 https://doi.org/10.1007/JHEP07(2017)132	journal	July 2017
Soft-drop thrust Baron, Jeremy; Marzani, Simone; Theeuwes, Vincent Journal of High Energy Physics, Vol. 2018, Issue 8 https://doi.org/10.1007/JHEP08(2018)105	journal	August 2018
High precision determination of αs from a global fit of jet rates Verbytskyi, Andrii; Banfi, Andrea; Kardos, Adam Journal of High Energy Physics, Vol. 2019, Issue 8 https://doi.org/10.1007/JHEP08(2019)129	journal	August 2019
A critical appraisal of NLO+PS matching methods Höche, Stefan; Krauss, Frank; Schönherr, Marek Journal of High Energy Physics, Vol. 2012, Issue 9 https://doi.org/10.1007/JHEP09(2012)049	journal	September 2012
Towards an understanding of jet substructure Dasgupta, Mrinal; Fregoso, Alessandro; Marzani, Simone Journal of High Energy Physics, Vol. 2013, Issue 9 https://doi.org/10.1007/JHEP09(2013)029	journal	September 2013
The Lund Monte Carlo for jet fragmentation Sjöstrand, Torbjörn Computer Physics Communications, Vol. 27, Issue 3 https://doi.org/10.1016/0010-4655(82)90175-8	journal	September 1982
The dipole formalism for the calculation of QCD jet cross sections at next-to-leading order Catani, S.; Seymour, M. H. Physics Letters B, Vol. 378, Issue 1-4 https://doi.org/10.1016/0370-2693(96)00425-X	journal	June 1996
A QCD model for jet fragmentation including soft gluon interference Webber, B. R. Nuclear Physics B, Vol. 238, Issue 3 https://doi.org/10.1016/0550-3213(84)90333-X	journal	June 1984
QCD coherent branching and semi-inclusive processes at large χ Catani, S.; Webber, B. R.; Marchesini, G. Nuclear Physics B, Vol. 349, Issue 3 https://doi.org/10.1016/0550-3213(91)90390-J	journal	February 1991
Resummation of large logarithms in e+e− event shape distributions Catani, S.; Trentadue, L.; Turnock, G. Nuclear Physics B, Vol. 407, Issue 1 https://doi.org/10.1016/0550-3213(93)90271-P	journal	October 1993
A general algorithm for calculating jet cross sections in NLO QCD Catani, S.; Seymour, M. H. Nuclear Physics B, Vol. 485, Issue 1-2 https://doi.org/10.1016/S0550-3213(96)00589-5	journal	February 1997
A brief introduction to PYTHIA 8.1 Sjöstrand, Torbjörn; Mrenna, Stephen; Skands, Peter Computer Physics Communications, Vol. 178, Issue 11 https://doi.org/10.1016/j.cpc.2008.01.036	journal	June 2008
Rivet user manual Buckley, Andy; Butterworth, Jonathan; Grellscheid, David Computer Physics Communications, Vol. 184, Issue 12 https://doi.org/10.1016/j.cpc.2013.05.021	journal	December 2013
Soft-drop event shapes in electron–positron annihilation at next-to-next-to-leading order accuracy Kardos, Adam; Somogyi, Gábor; Trócsányi, Zoltán Physics Letters B, Vol. 786 https://doi.org/10.1016/j.physletb.2018.10.014	journal	November 2018
General-purpose event generators for LHC physics Buckley, Andy; Butterworth, Jonathan; Gieseke, Stefan Physics Reports, Vol. 504, Issue 5 https://doi.org/10.1016/j.physrep.2011.03.005	journal	July 2011
Better jet clustering algorithms Dokshitzer, Yu. L.; Leder, G. D.; Moretti, S. Journal of High Energy Physics, Vol. 1997, Issue 08 https://doi.org/10.1088/1126-6708/1997/08/001	journal	August 1997
Matching NLO QCD computations and parton shower simulations Frixione, Stefano; Webber, Bryan R. Journal of High Energy Physics, Vol. 2002, Issue 06 https://doi.org/10.1088/1126-6708/2002/06/029	journal	June 2002
Theoretical uncertainties on α _s from event-shape variables in e ⁺ e ⁻ annihilations Jones, Roger W. L.; Ford, Matthew; Salam, Gavin P. Journal of High Energy Physics, Vol. 2003, Issue 12 https://doi.org/10.1088/1126-6708/2003/12/007	journal	December 2003
Principles of general final-state resummation and automated implementation Banfi, Andrea; Salam, Gavin P.; Zanderighi, Giulia Journal of High Energy Physics, Vol. 2005, Issue 03 https://doi.org/10.1088/1126-6708/2005/03/073	journal	March 2005
PYTHIA 6.4 physics and manual Sjöstrand, Torbjörn; Mrenna, Stephen; Skands, Peter Journal of High Energy Physics, Vol. 2006, Issue 05 https://doi.org/10.1088/1126-6708/2006/05/026	journal	May 2006
Non-perturbative QCD effects in jets at hadron colliders Dasgupta, Mrinal; Magnea, Lorenzo; Salam, Gavin P. Journal of High Energy Physics, Vol. 2008, Issue 02 https://doi.org/10.1088/1126-6708/2008/02/055	journal	February 2008
A parton shower algorithm based on Catani-Seymour dipole factorisation Schumann, S.; Krauss, F. Journal of High Energy Physics, Vol. 2008, Issue 03 https://doi.org/10.1088/1126-6708/2008/03/038	journal	March 2008
Event generation with SHERPA 1.1 Gleisberg, T.; Höche, S.; Krauss, F. Journal of High Energy Physics, Vol. 2009, Issue 02 https://doi.org/10.1088/1126-6708/2009/02/007	journal	February 2009
Determination of the strong coupling constant using matched NNLO+NLLA predictions for hadronic event shapes in e ⁺ e ⁻ annihilations Dissertori, G.; Ridder, A. Gehrmann-De; Gehrmann, T. Journal of High Energy Physics, Vol. 2009, Issue 08 https://doi.org/10.1088/1126-6708/2009/08/036	journal	August 2009
Precise determination of the strong coupling constant in N _f = 2+1 lattice QCD with the Schrödinger functional scheme collaboration, Pacs-Cs; Aoki, S.; Ishikawa, K. -I Journal of High Energy Physics, Vol. 2009, Issue 10 https://doi.org/10.1088/1126-6708/2009/10/053	journal	October 2009
α s ( M Z 2 ) from hadronic τ decays Maltman, K.; Yavin, T. Physical Review D, Vol. 78, Issue 9 https://doi.org/10.1103/PhysRevD.78.094020	journal	November 2008
Charmed and light pseudoscalar meson decay constants from four-flavor lattice QCD with physical light quarks Bazavov, A.; Bernard, C.; Komijani, J. Physical Review D, Vol. 90, Issue 7 https://doi.org/10.1103/PhysRevD.90.074509	journal	October 2014
Review of Particle Physics Tanabashi, M.; Hagiwara, K.; Hikasa, K. Physical Review D, Vol. 98, Issue 3 https://doi.org/10.1103/PhysRevD.98.030001	journal	August 2018
Jet Substructure as a New Higgs-Search Channel at the Large Hadron Collider Butterworth, Jonathan M.; Davison, Adam R.; Rubin, Mathieu Physical Review Letters, Vol. 100, Issue 24 https://doi.org/10.1103/PhysRevLett.100.242001	journal	June 2008
Precise Determination of the Strong Coupling Constant at NNLO in QCD from the Three-Jet Rate in Electron–Positron Annihilation at LEP Dissertori, G.; Gehrmann-DeRidder, A.; Gehrmann, T. Physical Review Letters, Vol. 104, Issue 7 https://doi.org/10.1103/PhysRevLett.104.072002	journal	February 2010
Scattering Amplitudes with Open Loops Cascioli, F.; Maierhöfer, P.; Pozzorini, S. Physical Review Letters, Vol. 108, Issue 11 https://doi.org/10.1103/PhysRevLett.108.111601	journal	March 2012
Strong Running Coupling at τ and Z 0 Mass Scales from Lattice QCD Blossier, B.; Boucaud, Ph.; Brinet, M. Physical Review Letters, Vol. 108, Issue 26 https://doi.org/10.1103/PhysRevLett.108.262002	journal	June 2012
Quantum Chromodynamics Test for Jets Farhi, Edward Physical Review Letters, Vol. 39, Issue 25 https://doi.org/10.1103/PhysRevLett.39.1587	journal	December 1977
Herwig++ physics and manual Bähr, Manuel; Gieseke, Stefan; Gigg, Martyn A. The European Physical Journal C, Vol. 58, Issue 4 https://doi.org/10.1140/epjc/s10052-008-0798-9	journal	November 2008
Non-perturbative contribution to the thrust distribution in e + e − annihilation Davison, R. A.; Webber, B. R. The European Physical Journal C, Vol. 59, Issue 1 https://doi.org/10.1140/epjc/s10052-008-0836-7	journal	December 2008
Determination of the strong coupling αS from hadronic event shapes with $\mathcal{O}(\ensuremath {\alpha _{\mathrm {S}}}^{3})$ and resummed QCD predictions using JADE data Bethke, S.; Kluth, S.; Pahl, C. The European Physical Journal C, Vol. 64, Issue 3 https://doi.org/10.1140/epjc/s10052-009-1149-1	journal	October 2009
FastJet user manual: (for version 3.0.2) Cacciari, Matteo; Salam, Gavin P.; Soyez, Gregory The European Physical Journal C, Vol. 72, Issue 3 https://doi.org/10.1140/epjc/s10052-012-1896-2	journal	March 2012
Colour reconnections in Herwig++ Gieseke, Stefan; Röhr, Christian; Siódmok, Andrzej The European Physical Journal C, Vol. 72, Issue 11 https://doi.org/10.1140/epjc/s10052-012-2225-5	journal	November 2012
Power corrections in the dispersive model for a determination of the strong coupling constant from the thrust distribution Gehrmann, Thomas; Luisoni, Gionata; Monni, Pier Francesco The European Physical Journal C, Vol. 73, Issue 1 https://doi.org/10.1140/epjc/s10052-012-2265-x	journal	January 2013
Measurement of the strong coupling α S from the three-jet rate in e+e−-annihilation using JADE data Schieck, J.; Bethke, S.; Kluth, S. The European Physical Journal C, Vol. 73, Issue 3 https://doi.org/10.1140/epjc/s10052-013-2332-y	journal	March 2013
The midpoint between dipole and parton showers Höche, Stefan; Prestel, Stefan The European Physical Journal C, Vol. 75, Issue 9 https://doi.org/10.1140/epjc/s10052-015-3684-2	journal	September 2015
Herwig 7.0/Herwig++ 3.0 release note Bellm, Johannes; Gieseke, Stefan; Grellscheid, David The European Physical Journal C, Vol. 76, Issue 4 https://doi.org/10.1140/epjc/s10052-016-4018-8	journal	April 2016
Improving the simulation of quark and gluon jets with Herwig 7 Reichelt, Daniel; Richardson, Peter; Siodmok, Andrzej The European Physical Journal C, Vol. 77, Issue 12 https://doi.org/10.1140/epjc/s10052-017-5374-8	journal	December 2017
The jet mass distribution after Soft Drop Marzani, Simone; Schunk, Lais; Soyez, Gregory The European Physical Journal C, Vol. 78, Issue 2 https://doi.org/10.1140/epjc/s10052-018-5579-5	journal	February 2018
Studies of QCD at ${\rm e}^ + {\rm e}^-$ centre-of-mass energies between 91 and 209 GeV The European Physical Journal C, Vol. 35, Issue 4, p. 457-486 https://doi.org/10.1140/epjc/s2004-01891-4	journal	July 2004
A modified cluster-hadronisation model Winter, J. -C.; Krauss, F.; Soff, G. The European Physical Journal C, Vol. 36, Issue 3 https://doi.org/10.1140/epjc/s2004-01960-8	journal	August 2004
Event generation with Sherpa 2.2 Bothmann, Enrico; Singh Chahal, Gurpreet; Höche, Stefan SciPost Physics, Vol. 7, Issue 3 https://doi.org/10.21468/SciPostPhys.7.3.034	journal	January 2019

Similar Records

Jet energy drop

Journal Article · 2020 · Journal of High Energy Physics (Online) · OSTI ID:1763668

Cal, Pedro; Lee, Kyle; Ringer, Felix; +1 more

Recursive Soft Drop

Journal Article · 2018 · Journal of High Energy Physics (Online) · OSTI ID:1499467

Dreyer, Frédéric A.; Necib, Lina; Soyez, Gregory; +1 more

EFT for soft drop double differential cross section

Journal Article · 2021 · Journal of High Energy Physics (Online) · OSTI ID:1851457

Pathak, Aditya; Stewart, Iain W.; Vaidya, Varun; +1 more

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
QCD phenomenology
jets

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

Citation Formats

References (56)

Similar Records

Related Subjects