374 citations · 6.3k across the 173 of their papers we have counts for
107 papers · 1 filter
Misalignment dynamics of Scalar Condensates with Yukawa coupling: Particle and Entropy Production
Nathan Herring, Daniel Boyanovsky
Misalignment dynamics, the non-equilibrium evolution of a scalar (or pseudoscalar) condensate in a potential landscape, broadly describes a solution to the strong CP problem, a mec…
Is the finite temperature effective potential, effective for dynamics?
Nathan Herring, Shuyang Cao, Daniel Boyanovsky
We study the applicability of the finite temperature effective potential in the equation of motion of a homogeneous "misaligned" scalar condensate , and find important caveats t…
Is the effective potential, effective for dynamics?
Nathan Herring, Shuyang Cao, Daniel Boyanovsky
We critically examine the applicability of the effective potential within dynamical situations and find, in short, that the answer is negative. An important caveat of the use of an…
Effective field theory of particle mixing
Shuyang Cao, Daniel Boyanovsky
We introduce an effective field theory to study \emph{indirect} mixing of two fields induced by their couplings to a common decay channel in a medium. The extension of the method o…
Chern Simons condensate from misaligned axions
Shuyang Cao, Daniel Boyanovsky
We obtain the non-equilibrium condensate of the Chern Simons density induced by a misaligned homogeneous coherent axion field in linear response. The Chern-Simons dynamical suscept…
Dynamics of axion-neutral pseudoscalar mixing
Shuyang Cao, Wenjie Huang, Daniel Boyanovsky
Axions mix with neutral pions after the QCD phase transition through their common coupling to the radiation bath via a Chern-Simons term, as a consequence of the anomaly. Th…
Brownian Axion-like particles
Shuyang Cao, Daniel Boyanovsky
We study the non-equilibrium dynamics of a pseudoscalar axion-like particle (ALP) weakly coupled to degrees of freedom in thermal equilibrium by obtaining its reduced density matri…
Thermalization by off-shell processes: the virtues of small virtuality
Daniel Boyanovsky
We study the thermalization of a scalar field coupled to two other scalar fields that constitute a bath in thermal equilibrium. For a range of masses the propagat…
Threshold and infrared singularities: time evolution, asymptotic state and entanglement entropy
Daniel Boyanovsky
Threshold and infrared divergences are studied as possible mechanisms of particle production and compared to the usual decay process in a model quantum field theory from which gene…
Infrared dressing in real time: emergence of anomalous dimensions
Mudit Rai, Lisong Chen, Daniel Boyanovsky
We implement a dynamical resummation method (DRM) as an extension of the dynamical renormalization group to study the time evolution of infrared dressing in non-gauge theories. Sup…
Interaction rates in cosmology: heavy particle production and scattering
Mudit Rai, Daniel Boyanovsky
We study transition rates and cross sections from first principles in a spatially flat radiation dominated cosmology. We consider a model of scalar particles to study scattering an…
Cosmological decay of Higgs-like scalars into a fermion channel
Daniel Boyanovsky, Nathan Herring
We study the decay of a Higgs-like scalar Yukawa coupled to massless fermions in post-inflationary cosmology, combining a non-perturbative method with an adiabatic expansion. The r…
Particle decay in post inflationary cosmology
Nathan Herring, Brian Pardo, Daniel Boyanovsky +1
We study scalar particle decay during the radiation and matter dominated epochs of a standard cosmological model. An adiabatic approximation is introduced that is valid for degrees…
Kinetic mixing between a Higgs and a nearly degenerate Dark scalar: oscillations and displaced vertices
Daniel Boyanovsky, Junmou Chen
Extensions beyond the Standard Model allow for a gauge singlet scalar to be kinetically coupled with the Higgs. We consider kinetic mixing between a Dark scalar gauge singlet \emph…
Production of heavy sterile neutrinos from vector boson decay at electroweak temperatures
Louis Lello, Daniel Boyanovsky, Robert D. Pisarski
In the standard model extended with a seesaw mass matrix, we study the production of sterile neutrinos from the decay of vector bosons at . We derive a general qua…
Effective Field Theory out of Equilibrium: Brownian quantum fields
D. Boyanovsky
The emergence of an effective field theory out of equilibrium is studied in the case in which a light field --the system-- interacts with very heavy fields in a finite temperature…
Nearly degenerate heavy sterile neutrinos in cascade decay: mixing and oscillations
Daniel Boyanovsky
Some extensions beyond the Standard Model propose the existence of nearly degenerate heavy sterile neutrinos. If kinematically allowed these can be resonantly produced and decay in…
Space-time evolution of heavy sterile neutrinos in cascade decays
Daniel Boyanovsky
Heavy sterile-like neutrinos may be produced resonantly from the decay of pseudoscalar mesons and may decay into several different channels in a cascade $Φ\rightarrow L^αν_h;ν_h\ri…
Time evolution of cascade decay
Daniel Boyanovsky, Louis Lello
We study non-perturbatively the time evolution of cascade decay for generic fields and obtain the time dependence of amplitudes and popul…
Snowmass-2013 Cosmic Frontier 3 (CF3) Working Group Summary: Non-WIMP dark matter
Alexander Kusenko, Leslie J. Rosenberg
Report of the CF-3 Working Group at Community Planning Study "Snowmass-2013".
Charged lepton mixing via heavy sterile neutrinos
Louis Lello, Daniel Boyanovsky
Pseudoscalar meson decay leads to an entangled state of charged leptons () and massive neutrinos. Tracing out the neutrino degrees of freedom leads to a reduced density matrix…
Searching for sterile neutrinos from and decays
Louis Lello, Daniel Boyanovsky
The production of heavy sterile neutrinos from decay at rest yields charged leptons with negative helicity (positive for ). We obtain the branching ratio for thi…
Condensates and quasiparticles in inflationary cosmology: mass generation and decay widths
Daniel Boyanovsky
During de Sitter inflation massless particles of minimally coupled scalar fields acquire a mass and a decay width thereby becoming \emph{quasiparticles}. For bare massless particle…
Short baseline neutrino oscillations: when entanglement suppresses coherence
Daniel Boyanovsky
For neutrino oscillations to take place the entangled quantum state of a neutrino and a charged lepton produced via charged current interactions must be disentangled. Implementing…