The isospin-3 three-particle K-matrix at NLO in ChPT

Jorge Baeza-Ballesteros; Johan Bijnens; Tomáš Husek; Fernando Romero-López; Stephen R. Sharpe; Mattias Sjö

doi:10.1007/JHEP05(2023)187

The isospin-3 three-particle K-matrix at NLO in ChPT

Jorge Baeza-Ballesteros, Johan Bijnens, Tomáš Husek, Fernando Romero-López, Stephen R. Sharpe, Mattias Sjö

Particle and nuclear physics

Research output: Contribution to journal › Article › peer-review

Abstract

The three-particle K-matrix, K_df_,₃ , is a scheme-dependent quantity that parametrizes short-range three-particle interactions in the relativistic-field-theory three-particle finite-volume formalism. In this work, we compute its value for systems of three pions at maximal isospin through next-to-leading order (NLO) in Chiral Perturbation Theory (ChPT). We compare the values to existing lattice QCD results and find that the agreement between lattice QCD data and ChPT in the first two coefficients of the threshold expansion of K_df_,₃ is significantly improved with respect to leading order once NLO effects are incorporated.

Original language	English
Article number	187
Journal	Journal of High Energy Physics
Volume	2023
Issue number	5
DOIs	https://doi.org/10.1007/JHEP05(2023)187
Publication status	Published - 2023 May

Subject classification (UKÄ)

Subatomic Physics

Free keywords

Chiral Lagrangian
Hadronic Spectroscopy
Lattice QCD
Structure and Interactions

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10.1007/JHEP05(2023)187Licence: CC BY

1 Doctoral Thesis (compilation)

Multi-Meson Dynamics in Chiral Perturbation Theory
Sjö, M., 2023 Nov 7, Lund: Lund University (Media-Tryck). 399 p.
Research output: Thesis › Doctoral Thesis (compilation)

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title = "The isospin-3 three-particle K-matrix at NLO in ChPT",

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keywords = "Chiral Lagrangian, Hadronic Spectroscopy, Lattice QCD, Structure and Interactions",

author = "Jorge Baeza-Ballesteros and Johan Bijnens and Tom{\'a}{\v s} Husek and Fernando Romero-L{\'o}pez and Sharpe, {Stephen R.} and Mattias Sj{\"o}",

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T1 - The isospin-3 three-particle K-matrix at NLO in ChPT

AU - Baeza-Ballesteros, Jorge

AU - Bijnens, Johan

AU - Husek, Tomáš

AU - Romero-López, Fernando

AU - Sharpe, Stephen R.

AU - Sjö, Mattias

PY - 2023/5

Y1 - 2023/5

N2 - The three-particle K-matrix, Kdf,3 , is a scheme-dependent quantity that parametrizes short-range three-particle interactions in the relativistic-field-theory three-particle finite-volume formalism. In this work, we compute its value for systems of three pions at maximal isospin through next-to-leading order (NLO) in Chiral Perturbation Theory (ChPT). We compare the values to existing lattice QCD results and find that the agreement between lattice QCD data and ChPT in the first two coefficients of the threshold expansion of Kdf,3 is significantly improved with respect to leading order once NLO effects are incorporated.

AB - The three-particle K-matrix, Kdf,3 , is a scheme-dependent quantity that parametrizes short-range three-particle interactions in the relativistic-field-theory three-particle finite-volume formalism. In this work, we compute its value for systems of three pions at maximal isospin through next-to-leading order (NLO) in Chiral Perturbation Theory (ChPT). We compare the values to existing lattice QCD results and find that the agreement between lattice QCD data and ChPT in the first two coefficients of the threshold expansion of Kdf,3 is significantly improved with respect to leading order once NLO effects are incorporated.

KW - Chiral Lagrangian

KW - Hadronic Spectroscopy

KW - Lattice QCD

KW - Structure and Interactions

U2 - 10.1007/JHEP05(2023)187

DO - 10.1007/JHEP05(2023)187

M3 - Article

AN - SCOPUS:85160063113

SN - 1029-8479

VL - 2023

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 5

M1 - 187

ER -

The isospin-3 three-particle K-matrix at NLO in ChPT

Abstract

Subject classification (UKÄ)

Free keywords

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Research output

Multi-Meson Dynamics in Chiral Perturbation Theory

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