Publications (68)
A note on the rare decay of a Higgs boson into photons and a boson
Ali Abbasabadi, Wayne W. Repko
We have calculated the width of the rare decay at one-loop level in the standard model for Higgs boson masses in the range .…
Relativistic two-photon and two-gluon decay rates of heavy quarkonia
Suraj N. Gupta, James M. Johnson, Wayne W. Repko
The decay rates of and through two-photon or two-gluon annihilations are obtained by using totally relativistic decay amplitudes and a sophisticated quantum-c…
High energy photon-neutrino elastic scattering
Ali Abbasabadi, Alberto Devoto, Wayne W. Repko
The one-loop helicity amplitudes for the elastic scattering process in the Standard Model are computed at high center of mass energies. A general decomposition of the…
Discriminating between models for the dark energy
Duane A. Dicus, Wayne W. Repko
Recent measurements suggest our universe has a substantial dark energy component, which is usually interpreted in terms of a cosmological constant. Here we examine how much the for…
Muon decay in a linearly polarized laser field
Arsham Farzinnia, Duane A. Dicus, Wayne W. Repko +1
In a previous paper, we showed that the decay rate of a muon is only slightly affected by the presence of a circularly polarized laser and we gave an analytic expression for the co…
Noncommutative QCD corrections to the gluonic decays of heavy quarkonia
Alberto Devoto, Stefano Di Chiara, Wayne W. Repko
We compute the Noncommutative QCD (NCQCD) contributions to the three gluon decay modes of heavy quarkonia. For triplet quarkonia (ortho-quarkonia), the NCQCD correction to the QCD…
W, Z and Higgs Scattering at SSC Energies
Suraj N. Gupta, James M. Johnson, Wayne W. Repko
We examine the scattering of longitudinal , and Higgs bosons in the Standard Model using the equivalent Goldstone-boson Lagrangian. Our calculations include the full one-loo…
Muonic hydrogen and the proton size
Wayne W. Repko, Duane A. Dicus
We reexamine the structure of the levels of muonic hydrogen using a two-body potential that includes all relativistic, recoil and one loop corrections. The potential was orig…
gamma nu -> gamma gamma nu and crossed processes at energies below m_W
Duane A. Dicus, Chung Kao, Wayne W. Repko
The cross sections for the processes , and are calculated for a range of center of mass energies from below to conside…
Dalitz Decay as a Background for
Duane A. Dicus, Wayne W. Repko
The Dalitz decay is calculated for very small invariant masses where the pair could be mistaken for a photon in analysis of deca…
Self Coupling of the Higgs boson in the processes and
Duane A. Dicus, Chung Kao, Wayne W. Repko
To gain some sense about the likelihood of measuring the Higgs boson quartic coupling, we calculate the contribution to the triple Higgs production cross section from the subproces…
Comparison of and including the ATLAS cuts
Duane A. Dicus, Chung Kao, Wayne W. Repko
A precise comparison is made between the Dalitz decay and the two body decay for electrons and for muons including experimental…
Modeling dark energy with a top-down approach
Duane A. Dicus, Wayne W. Repko
We investigate a top-down approach for modeling the dark energy where we fit the luminosity distances directly rather than indirectly fitting the equation of state.
Neutrino mixing with broken symmetry
Duane A. Dicus, Shao-Feng Ge, Wayne W. Repko
We explore the consequences of assuming that the neutrino mass matrix is a linear combination of the matrices of a three dimensional representation of the group and that it h…
Higgs boson decay into Z bosons and a photon
Ali Abbasabadi, Wayne W. Repko
We have performed a one-loop calculation of the width of the rare decay H -> Z Z γin the standard model for Higgs boson masses 190 GeV \leq m_H \leq 250 GeV. We find that the most…
Plasma Energy Loss into Kaluza-Klein Modes
Duane A. Dicus, Wayne W. Repko, Vigdor L. Teplitz
Recently, Barger {\em et al.} computed energy losses into Kaluza Klein modes from astrophysical plasmas in the approximation of zero density for the plasmas. We extend their work b…
Interference effects and the use of Higgs boson pair production to study the Higgs trilinear self coupling
Duane A. Dicus, Chung Kao, Wayne W. Repko
We show that the dominant channel proposed for the determination of the Higgs boson trilinear coupling, via gluon fusion, exhibits an interference structure that is in…
Z_2 Symmetry Prediction for the Leptonic Dirac CP Phase
Shao-Feng Ge, Duane A. Dicus, Wayne W. Repko
Model-independent consequences of applying a generalized hidden horizontal Z_2 symmetry to the neutrino mass matrix are explored. The Dirac CP phase delta_D can be expressed in ter…
Recent developments in the modeling of heavy quarkonia
Stanley F Radford, Wayne W. Repko
We examine the spectra and radiative decays of the cc-bar and bb-bar systems using a model which incorporates the complete one-loop spin-dependent perturbative QCD short distance p…
Gauge-boson scattering signals at the LHC
Suraj N. Gupta, James M. Johnson, Glenn A. Ladinsky +1
We have extended our earlier treatment of the gauge-boson scattering with radiative corrections in the standard model at supercollider energies, and computed the rates for gauge-bo…
W, Z and Higgs Scattering at SSC Energies
Suraj N. Gupta, James M. Johnson, Wayne W. Repko
The scattering of , and Higgs bosons in the Standard Model is investigated in the region with no restrictions on relative sizes of and , so tha…
Vacuum polarization corrections to the and levels in muonic He
Wayne W. Repko, Stanley F. Radford, Duane A. Dicus
The and levels for muonic Helium are calculated using a potential that includes all one-loop and recoil effects. Electronic vacuum polarization corrections are calculat…
Ultrahigh-Energy Neutrino-Nucleon Cross Sections and Perturbative Unitarity
Duane A. Dicus, Stefan Kretzer, Wayne W. Repko +1
Unitarity relates the total cross section for neutrino-nucleon scattering to the neutrino-nucleon forward scattering amplitude. Assuming the validity of the perturbative expansion…
Effective Lagrangians and low energy photon-photon scattering
Duane A. Dicus, Chung Kao, Wayne W. Repko
We use the behavior of the photon-photon scattering for photon energies less than the electron mass, , to examine the implications of treating the Euler-Heisenberg Lagran…
Potential model calculations and predictions for quarkonia
Stanley F. Radford, Wayne W. Repko, Michael J. Saelim
We investigate the spectroscopy and decays of the charm-strange quarkonium system in a potential model consisting of a relativistic kinetic energy term, a linear confining term inc…
Comment on "Damping of Tensor Modes in Cosmology"
Duane A. Dicus, Wayne W. Repko
We provide an analytic solution to the short wave length limit of the integro-differential equation describing the damping of the tensor modes of gravitational waves.
Pair production with neutrinos in an intense background magnetic field
Duane A. Dicus, Wayne W. Repko, Todd M. Tinsley
We present a detailed calculation of the electron-positron production rate using neutrinos in an intense background magnetic field. The computation is done for the process nu -> nu…
Comment on "Evolution of a Quasi-Stationary State"
Duane A. Dicus, Wayne W. Repko, Roy F. Schwitters +1
Approximately forty years ago it was realized that the time development of decaying systems might not be precisely exponential. Rolf Winter (Phys. Rev. {\bf 123}, 1503 (1961)) anal…
Vacuum polarization corrections to spectrum
Wayne W. Repko
The energy levels of the and bound states of the atom (true muonium) are calculated starting from a previously derived potential that correctly describes pos…
Radiative Higgs Boson Decays H -> f fbar gamma
Ali Abbasabadi, David Bowser-Chao, Duane A. Dicus +1
Higgs boson radiative decays of the form are calculated in the Standard Model using the complete one-loop expressions for the decay amplitudes. Contributi…
High energy photon-neutrino interactions
Ali Abbasabadi, Alberto Devoto, Duane A. Dicus +1
A general decomposition of the amplitudes for the processes and is obtained using gauge invariance and Bose symmetry. The restrictions impl…
Heavy Quarkonium Potential Model and the State of Charmonium
Suraj N. Gupta, James M. Johnson, Wayne W. Repko +1
A theoretical explanation of the observed splittings among the P~states of charmonium is given with the use of a nonsingular potential model for heavy quarkonia. We also show that…
Neutrino-photon Scattering in a Magnetic Field
Duane A. Dicus, Wayne W. Repko
Previous calculations of photon-neutrino scattering in a constant background magnetic field are extended and corrected.
Note on recent measurements of the $Ï(1S)\to\ga η_C(1S)$ and $Ï(2S)\to\ga η_C(1S)$ branching ratios
Stanley F. Radford, Wayne W. Repko
Recently published measurements of the branching ratios ${\cal B}(Ï(1S)\to\ga η_C(1S))$ and ${\cal B}(Ï(2S)\to\ga η_C(1S))$ by the CLEO collaboration are examined in the contex…
An analytic description of the damping of gravitational waves by free streaming neutrinos
Ben A. Stefanek, Wayne W. Repko
We provide an analytic solution to the general wavelength integro-differential equation describing the damping of tensor modes of gravitational waves due to free streaming neutrino…
Three-loop Static QCD Potential in Heavy Quarkonia
Wayne W. Repko, Marco D. Santia, Stanley F. Radford
We investigate the effects of including the full three-loop QCD correction to the static short distance potential on the spectroscopy and decays in the charmonium and upsilon…
Photon neutrino scattering
Duane A. Dicus, Wayne W. Repko
The cross section for photon neutrino scattering is calculated in the standard model assuming that the neutrino is massless and that the center of mass energy is small compared to…
Calculation of the decay ${\bm H\bm\to\bm e\bar{\bm e}\bm\ga}$
Duane A. Dicus, Wayne W. Repko
We revisit an earlier calculation of the decay $H\to e\,\bar{e}\ga$ using the recently reported mass value of the Higgs boson candidate observed in the ATLAS and CMS experiments to…
Describing Recently Discovered Narrow States as Quarkonia Using a Potential Model
Stanley F. Radford, Wayne W. Repko
We examine to what extent several recently discovered narrow resonances can be interpreted as conventional bound states describable using a potential model. In doing so,…
Noncommutative QED and the Lifetimes of Ortho and Para Positronium
Mauro Caravati, Alberto Devoto, Wayne W. Repko
We examine the implications of including corrections associated with the noncommutative extension of quantum electrodynamics - NCQED - to the decays of the ortho and para positroni…
Radiative corrections to the decays K_L^0->e^+e^- and K_L^0->mu^+mu^-
Duane A. Dicus, Wayne W. Repko
We calculate the rates and lepton (l) invariant mass distributions for decays of the form 0^{-+}->l^+l^-γ, which are important radiative corrections to the purely leptonic decays…
Muon decay in a laser field
Duane A. Dicus, Arsham Farzinnia, Wayne W. Repko +1
We investigate the change in the decay rate of a muon caused by embedding it in the field of a laser. A previous paper found that the change could be large, as much as an order of…
Residual Symmetries for Neutrino Mixing with a Large theta_13 and Nearly Maximal delta_D
Shao-Feng Ge, Duane A. Dicus, Wayne W. Repko
The residual Z^s_2(k) and bar Z^s_2(k) symmetries induce a direct and unique phenomenological relation with theta_x (= theta_13) expressed in terms of the other two mixing angles,…
Higgs-photon associated production at colliders
Ali Abbasabadi, David Bowser-Chao, Duane A. Dicus +1
We present complete analytical expressions for the amplitudes of the process . The calculation is performed using nonlinear gauges, which significantly sim…
Probing Anomalous Higgs Coupling through mu+ mu- --> H gamma
Ali Abbasabaddi, David Bowser-Chao, Duane A. Dicus +1
The process mu+ mu- --> H gamma, though small compared to the resonance process, could be observable at proposed muon colliders, given expected integrated luminosities. The apparen…
Generalized Hidden Symmetry of Neutrino Mixing
Duane A. Dicus, Shao-Feng Ge, Wayne W. Repko
We explore the consequences of the neutrino mass matrix having a hidden symmetry and one zero eigenvalue. When implemented, these two conditions give relations amon…
Critical Charges on Strange Quark Nuggets and Other Extended Objects
Duane A. Dicus, Wayne W. Repko, V. L. Teplitz
We investigate the behavior of the critical charge for spontaneous pair production, , defined as the charge at which the total energy of a -shell electron is , as a…
Potential model results for the newly discovered chi_b(3P) states
Stanley F. Radford, Wayne W. Repko
The ATLAS Collaboration has recently announced the discovery of the 3P states of the Upsilon system, chi_b(3P), with mass of 10.539+-0.004(stat.)+-0.008(syst.) GeV. In a previous i…
Hyperfine splittings in the system
Stanley F. Radford, Wayne W. Repko
Recent measurements of the , the ground state of the system, show the splitting between it and the $\Up(1S)$ to be 69.53.2 MeV, considerably larger than l…
\ga\ga and g g decay rates for equal mass heavy quarkonia
James T. Laverty, Stanley F. Radford, Wayne W. Repko
We present a calculation of the two-photon and two-gluon widths for the equal mass quarkonium states , and of the charmonium and upsilon systems. The approac…
Production of pseudoscalar Higgs-bosons in collisions
Duane A. Dicus, Wayne W. Repko
We investigate the production of a pseudoscalar Higgs-boson using the reaction at an collider with center of mass energy of 500 GeV. Supe…
The effects of a strongly interacting Higgs sector on scattering
A. Abbasabadi, David Bowser-Chao, Duane A. Dicus +1
We study the effects of a strongly interacting Higgs sector on the amplitudes for by unitarizing the $W_L^+\,W_L^-, Z_L^{\,0}…
Potential model calculations and predictions for heavy quarkonium
Stanley F. Radford, Wayne W. Repko
We investigate the spectroscopy and decays of the charmonium and upsilon systems in a potential model consisting of a relativistic kinetic energy term, a linear confining term incl…
Relativistic corrections to vacuum polarization contributions in muonic hydrogen
Wayne W. Repko
The method proposed by Kinoshita and Nio to compute higher order vacuum polarization contributions to the Coulomb potential in muonic hydrogen is generalized to obtain relativistic…
Comments on an alternative theory for the accelerating universe
Duane A. Dicus, Wayne W. Repko
We utilize the recently released supernova data of Riess {\it et al.} on the acceleration of the universe to determine how the parameters of a particular modification of gravity, t…
Measuring the neutrino mass using intense photon and neutrino beams
Duane A. Dicus, Wayne W. Repko, Roberto Vega
We compute the cross section for neutrino-photon scattering taking into account a neutrino mass. We explore the possibility of using intense neutrino beams, such as those available…
Optical activity of neutrinos and antineutrinos
Ali Abbasabadi, Wayne W. Repko
Using the one-loop helicity amplitudes for low-energy and scattering in the standard model with massless neutrinos, we study the optical activit…
Phenomenological Study of Residual Z^s_2 and Zbar^s_2 Symmetries
Andrew D. Hanlon, Shao-Feng Ge, Wayne W. Repko
The phenomenological consequences of the residual Z^s_2 and Zbar^s_2 symmetries are explored in detail. With a precisely measured value of the reactor angle, these two residual sym…
Production of neutral scalar Higgs bosons at colliders
Yi Liao, Wayne W. Repko
We study the production of neutral scalar (CP even) Higgs bosons in the process by including supersymmetric corrections to the dominant -channel photon exchange amp…
Photon-neutrino interactions
Duane A. Dicus, Wayne W. Repko
The cross sections for the processes γν--> γγν, γγ-->γν\barν and ν\barν -->γγγare calculated with the aid of an effective Lagrangian derived from the Standard model.…
Noncommutative QED corrections to e^+e^-\toγγγat linear collider energies
Alberto Devoto, Stefano Di Chiara, Wayne W. Repko
We compute the total cross section as well as angular and energy distributions for process with both unpolarized and polarized beams in the framework of noncommut…
Residual Symmetries Applied to Neutrino Oscillations at NOA and T2K
Andrew D. Hanlon, Wayne W. Repko, Duane A. Dicus
The results previously obtained from the model-independent application of a generalized hidden horizontal symmetry to the neutrino mass matrix are updated using the…
Photons, neutrinos and large compact space dimensions
Duane A. Dicus, Kristin Kovner, Wayne W. Repko
We compute the contribution of Kaluza-Klein graviton exchange to the cross section for photon-neutrino scattering. Unlike the usual situation where the virtual graviton exchange re…
Photons, neutrinos and optical activity
Ali Abbasabadi, Wayne W. Repko
We compute the one-loop helicity amplitudes for low-energy scattering and its crossed channels in the standard model with massless neutrinos. In the center of mass, w…
Constraints on the dark energy equation of state from recent supernova data
Duane A. Dicus, Wayne W. Repko
Measurements suggest that our universe has a substantial dark energy component. The most recent data on type Ia supernovae give a dark energy density which is in good agreement wit…
Note on predictions for quarkonia using a three-loop static potential
Noah Green, Wayne W. Repko, Stanley F. Radford
We extend our treatment of the the spectroscopy and decays of the charm-strange quarkonium system to include the effect of using the full three-loop QCD correction to the static sh…
Higgs boson decay to mu mubar gamma
Ali Abbasabadi, Wayne W. Repko
The Higgs boson decay, H -> mu mubar gamma, is studied in the Standard Model at the tree and one-loop levels. It is shown that for Higgs boson masses above 110 GeV, the contributio…
An estimate of the branching ratio for Z -> nu nubar gamma gamma
Duane A. Dicus, Wayne W. Repko
The effective interaction for two neutrino, two photon coupling is used to find an approximate width for the decay of the Z boson into the nu nubar gamma gamma final state.