scholarly journals Determination of SU(2) chiral perturbation theory low energy constants from a precise description of pion-pion scattering threshold parameters

2013 ◽  
Vol 88 (5) ◽  
Author(s):  
J. Nebreda ◽  
J. R. Peláez ◽  
G. Ríos
Keyword(s):  
Perturbation Theory ◽  
Chiral Perturbation Theory ◽  
Low Energy ◽  
Chiral Perturbation ◽  
Precise Description ◽  
Pion Scattering ◽  
Energy Constants

scholarly journals Determination of low-energy constants of Wilson chiral perturbation theory

2013 ◽  
Vol 2013 (5) ◽  
Author(s):  
Gregorio Herdoíza ◽  
◽  
Karl Jansen ◽  
Chris Michael ◽  
Konstantin Ottnad ◽  
...  
Keyword(s):  
Perturbation Theory ◽  
Chiral Perturbation Theory ◽  
Low Energy ◽  
Chiral Perturbation ◽  
Energy Constants

scholarly journals New method for fitting the low-energy constants in chiral perturbation theory

2020 ◽  
Vol 102 (9) ◽  
Author(s):  
Qin-He Yang ◽  
Wei Guo ◽  
Feng-Jun Ge ◽  
Bo Huang ◽  
Hao Liu ◽  
...  
Keyword(s):  
Perturbation Theory ◽  
Chiral Perturbation Theory ◽  
Low Energy ◽  
New Method ◽  
Chiral Perturbation ◽  
Energy Constants

scholarly journals Chiral Perturbation Theory vs. Linear Sigma Model in A Chiral Imbalance Medium

2019 ◽  
Author(s):  
Alexander Andrianov ◽  
Vladimir Andrianov ◽  
Domenec Espriu
Keyword(s):  
Perturbation Theory ◽  
Chiral Perturbation Theory ◽  
Sigma Model ◽  
Decay Constant ◽  
Charged Pion ◽  
Low Energy ◽  
Linear Sigma Model ◽  
Chiral Perturbation ◽  
Energy Constants ◽  
Parity Breaking

We compare Chiral Perturbation Theory (ChPT) and the Linear Sigma Model (LSM) as realizations of low energy QCD for light mesons in a chirally imbalanced medium. The relations between the low-energy constants of the Chiral Lagrangian and the corresponding constants of the Linear Sigma Model are established as well as the expressions for the decay constant of $\pi $-meson in the medium and for the mass of the $a_0$. In the large $N_c$ count taken from QCD the correspondence of ChPT and LSM is remarkably good and give a solid ground for search of chiral imbalance manifestation in pion physics. A possible experimental detection of chiral imbalance (and therefore a phase with Local Parity Breaking) is outlined in the charged pion decays inside the fireball.

scholarly journals SU(2) chiral perturbation theory low-energy constants from2+1flavor staggered lattice simulations

2013 ◽  
Vol 88 (1) ◽  
Author(s):  
Szabolcs Borsányi ◽  
Stephan Dürr ◽  
Zoltán Fodor ◽  
Stefan Krieg ◽  
Andreas Schäfer ◽  
...  
Keyword(s):  
Perturbation Theory ◽  
Chiral Perturbation Theory ◽  
Low Energy ◽  
Chiral Perturbation ◽  
Energy Constants

scholarly journals LOW-ENERGY CONSTANTS AND CONDENSATES FROM THE V – A SPECTRUM

2014 ◽  
Vol 35 ◽  
pp. 1460443
Author(s):  
DIOGO BOITO ◽  
MAARTEN GOLTERMAN ◽  
MATTHIAS JAMIN ◽  
KIM MALTMAN ◽  
SANTIAGO PERIS
Keyword(s):  
Perturbation Theory ◽  
Spectral Data ◽  
Chiral Perturbation Theory ◽  
Low Energy ◽  
Chiral Perturbation ◽  
Energy Constants

We present an analysis of the isospin-one V – A correlator based on our successful simultaneous description of the OPAL V and A non-strange tau spectral data. We discuss the values obtained for the Chiral Perturbation Theory low-energy constants L10 and C87 as well as the dimension-six and eight condensates and compare them with those in the literature.

scholarly journals The role of isospin filtering reactions in the S = −1 sector

2019 ◽  
Vol 199 ◽  
pp. 03008
Author(s):  
A. Feijoo ◽  
V.K. Magas ◽  
A. Ramos
Keyword(s):  
Perturbation Theory ◽  
High Spin ◽  
Chiral Perturbation Theory ◽  
Low Energy ◽  
Scattering Data ◽  
Leading Order ◽  
Chiral Perturbation ◽  
Effective Lagrangian ◽  
Energy Constants

The present study reveals interesting constraining effects of isospin filtering reactions on the low energy constants present in meson-baryon chiral effective Lagrangian, particularly, on the next-to-leading order constants. Our model has been developed within the framework of Unitarized Chiral Perturbation Theory and has been fitted to two-body scattering data in the sector of S = −1. In addition, the model was further elaborated by means of the inclusion of high-spin hyperonic resonances.

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