scholarly journals Universal scalar leptoquark action for matching

2021 ◽  
Vol 2021 (11) ◽  
Author(s):  
Athanasios Dedes ◽  
Kostas Mantzaropoulos
Keyword(s):  
Field Theory ◽  
Effective Field Theory ◽  
Effective Action ◽  
Dipole Moments ◽  
Effective Field ◽  
Fine Tuning ◽  
Neutrino Masses ◽  
Electric Dipole Moments ◽  
Scalar Leptoquark ◽  
Scalar Leptoquarks

Abstract In this study we present a universal effective action for one-loop matching of all scalar leptoquarks. We use both the Universal One-Loop Effective Action (UOLEA) and covariant diagrams to evaluate the Wilson coefficients directly in the Green basis for up to dimension-6 operators. On the technical side, we use the newly developed method of evaluating supertraces, to further validate the results stemming from the use of covariant diagrams. As an application, we perform a fully functional matching onto Standard Model Effective Field Theory (SMEFT) of a model with two scalar leptoquark fields: a weak isospin singlet and a doublet. We demonstrate its use by calculating several observables, such as lepton magnetic and electric dipole moments, neutrino masses, proton decay rate, while we comment upon fine tuning issues in this model. Apart from its phenomenological interest, this model generates the majority of dimension-6 operators and provides an EFT benchmark towards future matching automation.

scholarly journals Electric dipole moments of light nuclei from chiral effective field theory

2011 ◽  
Vol 84 (6) ◽  
Author(s):  
J. de Vries ◽  
R. Higa ◽  
C.-P. Liu ◽  
E. Mereghetti ◽  
I. Stetcu ◽  
...  
Keyword(s):  
Field Theory ◽  
Effective Field Theory ◽  
Electric Dipole ◽  
Dipole Moments ◽  
Effective Field ◽  
Light Nuclei ◽  
Chiral Effective Field Theory ◽  
Electric Dipole Moments

scholarly journals Effective field theory interpretation of lepton magnetic and electric dipole moments

2021 ◽  
Vol 2021 (7) ◽  
Author(s):  
Jason Aebischer ◽  
Wouter Dekens ◽  
Elizabeth E. Jenkins ◽  
Aneesh V. Manohar ◽  
Dipan Sengupta ◽  
...  
Keyword(s):  
Field Theory ◽  
Standard Model ◽  
Effective Field Theory ◽  
Electric Dipole ◽  
Dipole Moments ◽  
Effective Field ◽  
Effective Theory ◽  
Electric Dipole Moments ◽  
Independent Analysis ◽  
The One

Abstract We perform a model-independent analysis of the magnetic and electric dipole moments of the muon and electron. We give expressions for the dipole moments in terms of operator coefficients of the low-energy effective field theory (LEFT) and the Standard Model effective field theory (SMEFT). We use one-loop renormalization group improved perturbation theory, including the one-loop matching from SMEFT onto LEFT, and one-loop lepton matrix elements of the effective-theory operators. Semileptonic four-fermion operators involving light quarks give sizable non-perturbative contributions to the dipole moments, which are included in our analysis. We find that only a very limited set of the SMEFT operators is able to generate the current deviation of the magnetic moment of the muon from its Standard Model expectation.

scholarly journals Nuclear electric dipole moments in chiral effective field theory

2015 ◽  
Vol 2015 (3) ◽  
Author(s):  
J. Bsaisou ◽  
J. de Vries ◽  
C. Hanhart ◽  
S. Liebig ◽  
Ulf-G. Meißner ◽  
...  
Keyword(s):  
Field Theory ◽  
Effective Field Theory ◽  
Electric Dipole ◽  
Dipole Moments ◽  
Effective Field ◽  
Chiral Effective Field Theory ◽  
Electric Dipole Moments

scholarly journals Electric dipole moments of three-nucleon systems in the pionless effective field theory

2021 ◽  
Vol 104 (2) ◽  
Author(s):  
Zichao Yang ◽  
Emanuele Mereghetti ◽  
Lucas Platter ◽  
Matthias R. Schindler ◽  
Jared Vanasse
Keyword(s):  
Field Theory ◽  
Effective Field Theory ◽  
Electric Dipole ◽  
Dipole Moments ◽  
Effective Field ◽  
Electric Dipole Moments

Electric dipole moment induced by CP-violating deformations in the noncommutative Standard Model

2017 ◽  
Vol 32 (07) ◽  
pp. 1750044 ◽  
Author(s):  
Wei-Jian Wang ◽  
Zhe-Hui Yan ◽  
Rong-Hua Guan ◽  
Xing-Ning Wei
Keyword(s):  
Field Theory ◽  
Dipole Moment ◽  
Standard Model ◽  
Effective Field Theory ◽  
Electric Dipole ◽  
Dipole Moments ◽  
Effective Field ◽  
Observable Effect ◽  
Electric Dipole Moments ◽  
Intrinsic Feature

The possibility to detect the noncommutative (NC) spacetime in the electric dipole moments (EDM) experiments is studied in the effective field theory of noncommutative Standard Model (NCSM) with many additional deformations. The EDM given by the previous literatures do not have any observable effect since they are spin-independent. In this work, it is found that three of the deformed terms provide extra sources of CP violation contributed to EDM. We show that these EDMs are sensitive to the spin and thus have potential to be measured in the highly precise experiments. In particular, the EDM induced by NC spacetime may not be parallel to the direction of spin, which demonstrates the intrinsic feature of NC field theory.

scholarly journals Erratum to: Nuclear electric dipole moments in chiral effective field theory

2015 ◽  
Vol 2015 (5) ◽  
Author(s):  
J. Bsaisou ◽  
J. de Vries ◽  
C. Hanhart ◽  
S. Liebig ◽  
Ulf-G. Meißner ◽  
...  
Keyword(s):  
Field Theory ◽  
Effective Field Theory ◽  
Electric Dipole ◽  
Dipole Moments ◽  
Effective Field ◽  
Chiral Effective Field Theory ◽  
Electric Dipole Moments

scholarly journals Probing the nonunitarity of the leptonic mixing matrix at the CEPC

2016 ◽  
Vol 31 (33) ◽  
pp. 1644006 ◽  
Author(s):  
Stefan Antusch ◽  
Oliver Fischer
Keyword(s):  
Field Theory ◽  
Standard Model ◽  
Effective Field Theory ◽  
New Physics ◽  
Effective Field ◽  
Neutrino Masses ◽  
Performance Parameters ◽  
The Standard Model ◽  
Mixing Matrix ◽  
Theory Framework

The nonunitarity of the leptonic mixing matrix is a generic signal of new physics aiming at the generation of the observed neutrino masses. We discuss the Minimal Unitarity Violation (MUV) scheme, an effective field theory framework which represents the class of extensions of the Standard Model (SM) by heavy neutral leptons, and discuss the present bounds on the nonunitarity parameters as well as estimates for the sensitivity of the CEPC, based on the performance parameters from the preCDR.

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