244 citations · 1.9k across the 75 of their papers we have counts for
24 papers · 1 filter
Neutral and Charged Higgs boson phenomenology at the LHeC and FCC-eh
Siba Prasad Das, Marek Nowakowski, J. Hernández-Sánchez +2
We have analyzed the prospects of observing the lightest CP-even neutral Higgs boson () via decays into pairs in the neutral and charged current production processe…
Traveling Waves in the Euler-Heisenberg Electrodynamics
A. Bermudez Manjarres, Marek Nowakowski
We examine the possibility of travelling wave solutions within the nonlinear Euler-Heisenberg electrodynamics. Since this theory resembles in its form the electrodynamics in matter…
Light neutral CP-even Higgs boson within Next-to-Minimal Supersymmetric Standard model (NMSSM) at the Large Hadron electron Collider (LHeC)
Siba Prasad Das, Marek Nowakowski
We analyze the prospects of observing the light CP-even neutral Higgs bosons () in their decays into quarks, in the neutral and charged current production processes…
Extraction of the proton charge radius from experiments
N. G. Kelkar, T. Mart, M. Nowakowski
Static properties of hadrons such as their radii and other moments of the electric and magnetic distributions can only be extracted using theoretical methods and not directly measu…
Lorentz Contracted Proton
D. Bedoya Fierro, N. G. Kelkar, M. Nowakowski
The proton charge and magnetization density distributions can be related to the well known Sachs electromagnetic form factors through Fourier transforms, onl…
Determining the size of the proton
N. G. Kelkar, F. Garcia Daza, M. Nowakowski
A measurement of the Lamb shift of 49,881.88(76) GHz in muonic hydrogen in conjunction with theoretical estimates of the proton structure effects was recently used to deduce an acc…
Breit Equation with Form Factors in the Hydrogen Atom
F. Garcia Daza, N. G. Kelkar, M. Nowakowski
The Breit equation with two electromagnetic form-factors is studied to obtain a potential with finite size corrections. This potential with proton structure effects includes apart…
Long Tail of Quantum Decay from Scattering Data
M. Nowakowski, N. G. Kelkar
Whereas the short time behaviour of an unstable quantum mechanical system is well understood from its theoretical as well as experimental side, the long time tail of the very same…
Pentaquark Resonances from Collision Times
N. G. Kelkar, M. Nowakowski
Having successfully explored the existing relations between the S-matrix and collision times in scattering reactions to study the conventional baryon and meson resonances, the meth…
The Use of the Scattering Phase Shift in Resonance Physics
M. Nowakowski, N. G. Kelkar
The scattering phase shift encodes a good amount of physical information which can be used to study resonances from scattering data. Among others, it can be used to calculate the c…
Time delayed K+ N reactions and exotic baryon resonances
N. G. Kelkar, M. Nowakowski, K. P. Khemchandani
Evidences and hints, both from the theoretical and experimental side, of exotic baryon resonances with B=S, have been with us for the last thirty years. The poor status of the gene…
Time Delay Plots of Unflavoured Baryons
N. G. Kelkar, M. Nowakowski, K. P. Khemchandani +1
We explore the usefulness of the existing relations between the -matrix and time delay in characterizing baryon resonances in pion-nucleon scattering. We draw attention to the f…
Quantum Instability for Mixed States
Marek Nowakowski
The analysis of the time evolution of unstable states which are linear superposition of other, observable, states can, in principle, be carried out in two distinct, non-equivalent…
Subtleties in CPT-Transformation for Majorana fermions
Marek Nowakowski
We point out the relevance of the so-called Majorana creation phase in the s-channel matrix elements in connection with the CPT-transformation of the latter.
Long Range Forces from Quantum Field Theory at Zero and Finite Temperature
Marek Nowakowski
We discuss the derivation of Newtonian potentials in the framework of quantum field theory. We focus on two particular points: on long range forces i.e. forces which fall off as $1…
Bell-inequalities for Entangled Neutral Kaons
Albert Bramon, Marek Nowakowski
We extend the use of Bell-inequalities to decays by exploiting analogies and differences to the well-known and experimentally verified singlet-spin case. Contr…
Higgs- and Goldstone bosons-mediated long range forces
F. Ferrer, M. Nowakowski
In certain mild extensions of the Standard Model, spin-independent long range forces can arise by exchange of two very light pseudoscalar spin--0 bosons. In particular, we have in…
W- and Z-Boson Interactions in Supersymmetric Models with Explicit R-Parity Violation
Marek Nowakowski, Apostolos Pilaftsis
The minimal supersymmetric Standard Model with explicit R-parity nonconservation contains bilinear terms involving the left-handed lepton superfields and the Higgs chiral multiplet…
TIME EVOLUTION OF SYSTEM IN SPECTRAL FORMULATION
Marek Nowakowski
We reanalyse the time evolution of the system in the language of certain spectral function whose Fourier transforms give the time dependent survival and transition…
Triplet Higgs bosons at colliders
R. M. Godbole, B. Mukhopadhyaya, M. Nowakowski
We investigate the possibility of probing the triplet Higgs boson sector via single charged Higgs production in the process , at high energy electron-positro…
Astrophysical Limits on Gravitino Mass
M. Nowakowski, S. D. Rindani
We calculate exotic cooling rates of stars due to photo-production of light particles (mostly scalars and pseudoscalars) which originate from the hidden sector of no scale supergra…
Processes at High Energy pp Colliders
M. Drees, R. M. Godbole, M. Nowakowski +1
In this note we investigate the production of charged heavy particles via \gaga\ fusion at high energy pp colliders. We revise previous claims that the \gaga\ cross section is comp…
On Gauge Invariance of Breit-Wigner Propagators
M. Nowakowski, A. Pilaftsis
We present an approach to bosonic () as well as fermionic (top-quark) Breit-Wigner propagators which is consistent with gauge invariance arguments. In particular, for…
Dominant Three-Body Decays of a Heavy Higgs and Top Quark
R. Decker, M. Nowakowski, A. Pilaftsis
We calculate the dominant three body Higgs decays, and , in the Standard Model. We find that the branching ratios of these deca…