Low energy electromagnetic processes based on the chiral effective field theory approach

2010 ◽  
Vol 34 (9) ◽  
pp. 1393-1395
Author(s):  
D Rozpedzik ◽  
J Golak
Keyword(s):  
Field Theory ◽  
Effective Field Theory ◽  
Effective Field ◽  
Low Energy ◽  
Theory Approach ◽  
Chiral Effective Field Theory ◽  
Electromagnetic Processes

scholarly journals ELECTROMAGNETIC PROCESSES IN χEFT

2009 ◽  
Vol 24 (11n13) ◽  
pp. 931-936 ◽  
Author(s):  
S. PASTORE ◽  
R. SCHIAVILLA ◽  
J. L. GOITY
Keyword(s):  
Field Theory ◽  
Circular Polarization ◽  
Cross Section ◽  
Effective Field Theory ◽  
Magnetic Moments ◽  
Effective Field ◽  
Polarization Parameter ◽  
Chiral Effective Field Theory ◽  
Electromagnetic Processes ◽  
Theory Framework

Nuclear electromagnetic currents derived in a chiral-effective-field-theory framework including explicit nucleons, Δ isobars, and pions up to N2LO, i.e. ignoring loop corrections, are used in a study of neutron radiative captures on protons and deuterons at thermal energies, and of A=2 and 3 nuclei magnetic moments. With the strengths of the Δ-excitation currents determined to reproduce the n-p cross section and isovector combination of the trinucleon magnetic moments, we find that the cross section and photon circular polarization parameter, measured respectively in n-d and [Formula: see text] processes, are significantly underpredicted by theory.

scholarly journals Low-energy phenomenology of scalar leptoquarks at one-loop accuracy

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Valerio Gherardi ◽  
David Marzocca ◽  
Elena Venturini
Keyword(s):  
Field Theory ◽  
Dipole Moment ◽  
Effective Field Theory ◽  
Magnetic Dipole Moment ◽  
Effective Field ◽  
Low Energy ◽  
Theory Approach ◽  
The Standard Model ◽  
Complete Study ◽  
Scalar Leptoquarks

Abstract We perform a complete study of the low-energy phenomenology of S1 and S3 leptoquarks, aimed at addressing the observed deviations in B-meson decays and the muon magnetic dipole moment. Leptoquark contributions to observables are computed at one-loop accuracy in an effective field theory approach, using the recently published complete one-loop matching of these leptoquarks to the Standard Model effective field theory. We present several scenarios, discussing in each case the preferred parameter space and the most relevant observables.

scholarly journals THE ROLE OF THE Δ(1232)-RESONANCE IN COVARIANT BARYON CHIRAL PERTURBATION THEORY

2014 ◽  
Vol 26 ◽  
pp. 1460088
Author(s):  
J. M. ALARCÓN
Keyword(s):  
Field Theory ◽  
Perturbation Theory ◽  
Effective Field Theory ◽  
Effective Field ◽  
Scattering Data ◽  
Theory Approach ◽  
Chiral Perturbation ◽  
Chiral Effective Field Theory ◽  
Dynamical Degree

We stress, on theoretical and phenomenological grounds, the importance of the Δ(1232)-resonance in a chiral effective field theory approach to the study of πN scattering. We show how its inclusion as a dynamical degree of freedom allow us to obtain reliably valuable information from πN scattering data.

scholarly journals Partial restoration of chiral symmetry in hot and dense neutron matter

2017 ◽  
Vol 26 (01n02) ◽  
pp. 1740010 ◽  
Author(s):  
Jeremy W. Holt ◽  
Keighley E. Rockcliffe
Keyword(s):  
Field Theory ◽  
Chiral Symmetry ◽  
Effective Field Theory ◽  
Effective Field ◽  
Neutron Matter ◽  
Low Energy ◽  
Chiral Symmetry Restoration ◽  
Chiral Effective Field Theory ◽  
Partial Restoration

We review efforts to describe the approach to chiral symmetry restoration in neutron matter from the low-energy realization of QCD, chiral effective field theory.

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