Article
Physics, Particles & Fields
Upalaparna Banerjee, Joydeep Chakrabortty, Suraj Prakash, Shakeel Ur Rahaman, Michael Spannowsky
Summary: The BSMEFT is a theoretical framework constructed when the physics spectrum beyond the SM is non-degenerate, including additional IR degrees of freedom. Constructing a BSMEFT is usually the first step after experimental evidence for a new particle is established. This paper provides BSMEFT models and their EFT Lagrangian for three different scenarios.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Ki-Seok Kim
Summary: This study investigates disordered strongly coupled conformal field theories in the large central-charge limit. By considering a quenched average for metric fluctuations and the renormalization group flow of the metric-tensor distribution function, it is revealed that the renormalized distribution function universally shows a power-law behavior, interpreted as an infinite randomness fixed point.
Article
Physics, Particles & Fields
Mathias Heiles, Matthias Koenig, Matthias Neubert
Summary: The paper constructs an effective field theory describing the decays of a heavy vector resonance V into Standard Model particles based on SCETBSM. By using the renormalization-group evolution of the couplings in the effective Lagrangian, large logarithms associated with the scale ratio can be resummed to all orders.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Di Zhang, Shun Zhou
Summary: In this paper, the complete one-loop matching of the Type-I seesaw model onto the Standard Model Effective Field Theory (SMEFT) is accomplished, resulting in 31 dimension-six operators in the Warsaw basis of the SMEFT. The Wilson coefficients of these operators are computed up to O(M-2), where M is the mass scale of heavy Majorana neutrinos. The effects of heavy Majorana neutrinos on low-energy phenomenology are explored through this one-loop matching, along with discussions on threshold corrections in the Standard Model and the coefficient of the dimension-five operator.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Editorial Material
Physics, Particles & Fields
Quentin Bonnefoy, Luca Di Luzio, Christophe Grojean, Ayan Paul, Alejo N. Rossia
Summary: Investigations indicate that higher-dimensional operators in effective field theories cannot source gauge anomalies by modifying interactions involved in triangle diagrams, with dimension-6 operators able to be chosen independently without affecting the consistency of the theory. This finding applies to both the Standard Model and the Standard Model Effective Field Theory, offering a new method to verify the absence of anomalies in the Standard Model.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
L. Allwicher, D. A. Faroughy, F. Jaffredo, O. Sumensari, F. Wilsch
Summary: We investigate the high-pT tails of the pp -> lv and pp -> ll Drell-Yan processes as probes of New Physics in semileptonic interactions. We provide a general decomposition of the 2 -> 2 scattering amplitudes and derive constraints on Wilson coefficients for semileptonic four-fermion and dipole operators as well as leptoquark models using the latest LHC run-II data. Our results highlight the complementarity between high-pT processes, electroweak pole measurements, and low-energy flavor data.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Jiayin Gu, Lian-Tao Wang
Summary: By classifying massless helicity amplitudes, we are able to systematically derive sum rules for dimension-6 operators in the Standard Model Effective Field Theory which offer insights into the relationships between operator coefficients and the properties of the full theory. These sum rules extend beyond tree level and can be practically utilized to compute one-loop contributions to low energy observables, while also providing a unique perspective on custodial symmetries in the SM Higgs and fermion sectors.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
John Ellis, Maeve Madigan, Ken Mimasu, Veronica Sanz, Tevong You
Summary: The search for effective field theory deformations of the Standard Model is conducted through a global approach in the framework of the Standard Model Effective Field Theory. The analysis includes constraints on the coefficients of SMEFT operators and explores specific ultra-violet completions of the Standard Model, but does not find significant evidence for physics beyond the Standard Model.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Fabiola Fortuna, Pablo Roig, Jose Wudka
Summary: In this study, interactions between dark matter and standard model particles with spin one mediators are analyzed within an effective field theory framework. Solutions corresponding to operators with antisymmetric tensor mediators that meet various experimental constraints are obtained.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Adam Falkowski, Martin Gonzalez-Alonso, Oscar Naviliat-Cuncic
Summary: This paper reviews and analyzes precision measurements in allowed nuclear beta decays and neutron decay, confirming the V-A character of the interaction and updating the values for V-ud and g(A) at the 10^(-4) level. By incorporating data from mirror beta transitions in new global fits, the study also places new stringent limits on exotic couplings involving left-handed and right-handed neutrinos.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Mohammed Khalil, Raissa F. P. Mendes, Nestor Ortiz, Jan Steinhoff
Summary: In certain scalar-field extensions to general relativity, the effect of dynamical scalarization, where scalar charges develop on compact objects in an inspiraling binary, can be modeled using effective-field-theory methods applied to the binary within the post-Newtonian approximation. Previous studies focused on the adiabatic case for quasicircular orbits. This work explores the full dynamical evolution around the phase transition to the scalarized regime, considering generic orbits and quantifying nonadiabatic behavior. The results indicate that the full dynamics must be taken into account to reliably predict the onset of scalarization.
Article
Astronomy & Astrophysics
Yi-Lin Li, Xi-Jing Wang, Guoyang Fu, Jian-Pin Wu
Summary: In this paper, a 3-dimensional holographic effective theory with gauge-axion coupling is implemented and an analytical black hole solution is obtained. The Direct current (DC) thermoelectric conductivities are investigated, and it is found that the DC electric conductivity is temperature dependent when the gauge-axion coupling vanishes, unlike the 4-dimensional axion model. Moreover, the gauge-axion coupling induces a metal insulator transition (MIT) at zero temperature. The properties of other DC thermoelectric conductivities are also discussed, and the violation of the Wiedemann-Franz law in this model is discovered.
Article
Physics, Particles & Fields
Andreas Helset, Elizabeth E. Jenkins, Aneesh V. Manohar
Summary: S-matrix elements are unaffected by field redefinitions and are determined by geometric quantities such as the curvature of the field-space manifold. A formalism is presented where both scalar and gauge fields are considered together, using a metric on the combined space. Scalar and gauge scattering amplitudes are given by the Riemann curvature of this combined space, and one-loop divergences can be computed using geometric invariants. The formalism is applied to compute renormalization group equations for even-parity bosonic operators in the Standard Model Effective Field Theory.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Borna Salehian, Hong-Yi Zhang, Mustafa A. Amin, David Kaiser, Mohammad Hossein Namjoo
Summary: This paper systematically derives the SP equations and relativistic corrections from the nonlinear and fully relativistic KGE equations in an expanding universe, providing insights into deviations and applicability beyond the SP system. The method presented simplifies the analysis of scalar dark matter dynamics and accurately captures deviations from the SP system towards the full KGE case, particularly in calculating the mass-radius relationship of solitons.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Multidisciplinary
Xu Li, Hao Xu, Chengjie Yang, Cen Zhang, Shuang-Yong Zhou
Summary: In this paper, we discuss a general method for obtaining full positivity bounds on multifield effective field theories, showing that the traditional approach only gives incomplete bounds for theories with three or more low-energy modes. We introduce a new method to determine optimal positivity bounds either analytically or numerically, and demonstrate its effectiveness with various examples in particle physics and cosmology. This SDP approach leads to improved or entirely new results, and is numerically more efficient compared to previous methods.
PHYSICAL REVIEW LETTERS
(2021)