262 research outputs found
Orbit Portraits of Unicritical Anti-polynomials
Orbit portraits were introduced by Milnor as a combinatorial tool to describe
the patterns of all periodic dynamical rays landing on a periodic cycle of a
quadratic polynomial. This encodes information about the dynamics and the
parameter spaces of these maps. We carry out a similar analysis for unicritical
anti-polynomials and give an explicit description of the orbit portraits that
can occur for such maps in terms of their characteristic angles, which turns
out to be rather restricted when compared with the holomorphic case. Finally,
we prove a realization theorem for these combinatorial objects. The results
obtained in this paper serve as a combinatorial foundation for a detailed
understanding of the combinatorics and topology of the parameter spaces of
unicritical anti-polynomials and their connectedness loci, known as the
multicorns
Lepton flavour violating decay of 125 GeV Higgs boson to channel and excess in
A recent search for the lepton flavor violating (LFV) decays of the Higgs
boson, performed by CMS collaboration, reports an interesting deviation from
the standard model (SM). The search conducted in the channel and shows an excess of
signal events with 19.7 fb data at a center-of-mass energy
TeV. On the other hand, a search performed by CMS collaboration for
the SM Higgs boson produced in association with a top quark pair ()
also showed an excess in the same-sign di-muon final state. In this work we try
to find out if these two seemingly uncorrelated excesses are related or not.
Our analysis reveals that a lepton flavour violating Higgs decay
() can partially explain the excess in the same sign
di-muon final state in the search, infact brings down the excess
well within 2 error of the SM expectation. Probing such non-standard
Higgs boson decay is of interest and might contain hints of new physics at the
electroweak scale.Comment: 10 pages, 2 figures and 3 table
Rational Parameter Rays of The Multibrot Sets
We prove a structure theorem for the multibrot sets, which are the higher
degree analogues of the Mandelbrot set, and give a complete picture of the
landing behavior of the rational parameter rays and the bifurcation phenomenon.
Our proof is inspired by previous works of Schleicher and Milnor on the
combinatorics of the Mandelbrot set; in particular, we make essential use of
combinatorial tools such as orbit portraits and kneading sequences. However, we
avoid the standard global counting arguments in our proof and replace them by
local analytic arguments to show that the parabolic and the Misiurewicz
parameters are landing points of rational parameter rays
- …