Results 71 to 80 of about 670,040 (334)
Minimal Extension of the Standard Model Scalar Sector [PDF]
, 2006 The minimal extension of the scalar sector of the standard model contains an additional real scalar field with no gauge quantum numbers. Such a field does not couple to the quarks and leptons directly but rather through its mixing with the standard model
Donal O’Connell +4 more
core +2 more sources
Population Ecology, EarlyView.Population size and dynamics fundamentally shape speciation by influencing genetic drift, founder events, and adaptive potential. Small populations may speciate rapidly due to stronger drift, whereas large populations harbor more genetic diversity, which can alter divergence trajectories. We highlight theoretical models that incorporate population size
Ryo Yamaguchi +3 more
wiley +1 more source
Zero-dimensional models for gravitational and scalar QED decoherence
New Journal of Physics, 2022 We investigate the dynamics of two quantum mechanical oscillator system–bath toy models obtained by truncating to zero spatial dimensions linearized gravity coupled to a massive scalar field and scalar quantum electrodynamics (QED).
Qidong Xu, M P Blencowe
doaj +1 more source
Scalar and vector gauges unification in de Sitter ambient space formalism
Nuclear Physics B, 2022 We consider the massless minimally coupled scalar field in the de Sitter ambient space formalism as a gauge potential or connection field. We construct the scalar gauge theory by helping an arbitrary constant five-vector field Bα analogous to the ...
M.V. Takook
doaj +1 more source
Mixing Renormalization for Scalar Fields [PDF]
International Journal of Modern Physics A, 2003 We consider the renormalization of theories with many scalar fields. We discuss at the one-loop level some simple, non-gauge models with an arbitrary number of scalars and fermions both in mass-shell and MS schemes. In the MS scheme we give a detailed qualitative analysis of the RG flow of dimensionless couplings in flavor space.
openaire +3 more sources
Generalized second law of thermodynamics in scalar-tensor gravity
, 2014 Within the context of scalar-tensor gravity, we explore the generalized second law (GSL) of gravitational thermodynamics. We extend the action of ordinary scalar-tensor gravity theory to the case in which there is a non-minimal coupling between the ...
Abdolmaleki, A., Karami, K., Najafi, T.
core +1 more source
Exploring lipid diversity and minimalism to define membrane requirements for synthetic cells
FEBS Letters, EarlyView.Designing the lipid membrane of synthetic cells is a complex task, in which its various roles (among them solute transport, membrane protein support, and self‐replication) should all be integrated. In this review, we report the latest top‐down and bottom‐up advances and discuss compatibility and complexity issues of current engineering approaches ...
Sergiy Gan +2 more
wiley +1 more source
A 3D Phase Space Analysis of Scalar Field Potentials
Universe, 2022 In this study, we present the phase-space analysis of Quintessence models specified by the choice of two potentials, namely the Recliner potential and what we call the broken exponential-law potential, which is a new proposal.
Francesco Pace, Noemi Frusciante
doaj +1 more source
Quantum gravity and scalar fields
Physics Letters B, 2010 In this paper we consider the quantization of a scalar field coupled to gravity at one loop order. We investigate the divergences appearing in the mass (i.e. phi^2) term in the effective action. We use the Vilkovisky-DeWitt effective action technique which guarantees that the result is gauge invariant as well as gauge condition independent in contrast ...
Mackay PT, Toms DJ
openaire +4 more sources
Reformulating scalar–tensor field theories as scalar–scalar field theories using a novel geometry
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2022 In this paper, I shall show how the notions of Finsler geometry can be used to construct a similar geometry using a scalar field, f , on the cotangent bundle of a differentiable manifold M . This will enable me to use the second vertical derivatives of f , along with ...
openaire +3 more sources