The isospin-3 three-particle K-matrix at NLO in ChPT
(2023) In Journal of High Energy Physics 2023(5).- Abstract
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.
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https://lup.lub.lu.se/record/dff6e0f5-ad48-47e8-8031-7d9a823bdc9e
- author
- Baeza-Ballesteros, Jorge ; Bijnens, Johan LU ; Husek, Tomáš LU ; Romero-López, Fernando ; Sharpe, Stephen R. and Sjö, Mattias LU
- organization
- publishing date
- 2023-05
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Chiral Lagrangian, Hadronic Spectroscopy, Lattice QCD, Structure and Interactions
- in
- Journal of High Energy Physics
- volume
- 2023
- issue
- 5
- article number
- 187
- publisher
- Springer
- external identifiers
-
- scopus:85160063113
- ISSN
- 1029-8479
- DOI
- 10.1007/JHEP05(2023)187
- language
- English
- LU publication?
- yes
- id
- dff6e0f5-ad48-47e8-8031-7d9a823bdc9e
- date added to LUP
- 2023-08-23 14:56:27
- date last changed
- 2023-11-08 09:42:28
@article{dff6e0f5-ad48-47e8-8031-7d9a823bdc9e, abstract = {{<p>The three-particle K-matrix, K<sub>df</sub><sub>,</sub><sub>3</sub> , 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<sub>df</sub><sub>,</sub><sub>3</sub> is significantly improved with respect to leading order once NLO effects are incorporated.</p>}}, author = {{Baeza-Ballesteros, Jorge and Bijnens, Johan and Husek, Tomáš and Romero-López, Fernando and Sharpe, Stephen R. and Sjö, Mattias}}, issn = {{1029-8479}}, keywords = {{Chiral Lagrangian; Hadronic Spectroscopy; Lattice QCD; Structure and Interactions}}, language = {{eng}}, number = {{5}}, publisher = {{Springer}}, series = {{Journal of High Energy Physics}}, title = {{The isospin-3 three-particle K-matrix at NLO in ChPT}}, url = {{http://dx.doi.org/10.1007/JHEP05(2023)187}}, doi = {{10.1007/JHEP05(2023)187}}, volume = {{2023}}, year = {{2023}}, }