31 research outputs found
The Higgs Sector and electron electric dipole moment in next-to-minimal supersymmetry with explicit CP violation
We study the explicit CP violation of the Higgs sector in the
next--to--minimal supersymmetric model with a gauge singlet Higgs field. Our
numerical predictions show that electric dipole moment of electron lies around
the present experimental upper limits. The mass of the lightest Higgs boson is
quite sensitive to the CP violating phases in the theory. It is observed that
as the vacuum expectation value of the singlet gets higher values, CP violation
increases.Comment: 20 pages, 16 figure
The Constraints on CP Violating Phases in models with a dynamical gluino phase
We have analyzed the electric dipole moment and the Higgs mass constraints on
the supersymmetric model which offers dynamical solutions to the \mu and strong
CP problems. The trilinear coupling phases, and \tan\beta-|\mu| are strongly
correlated, particularly in the low-\tan\beta regime. Certain values of the
phases of the trilinear couplings are forbidden, whereas the CP violating phase
from the chargino sector is imprisoned to lie near a CP conserving point, by
the Higgs mass and electric dipole moment constraints.Comment: 19 pages, 11 eps fig
The Higgs masses and explicit CP violation in the gluino-axion model
In this work, we adress the phenomenological consequences of explicit CP
violation on direct Higgs-boson searches at high energy colliders. Having a
restricted parameter space, we concentrate on the recently proposed
gluino-axion model, and investigate the CP violation capability of the model
subject to the recent experimental data. It is shown that the Higgs masses as
well as their CP compositions are quite sensitive to the supersymmetric CP
phases. The lightest Higgs is found to be nearly CP even to a good
approximation whilst the remaining two heavy scalars do not have definite CP
parities.Comment: 20 pp, 14 eps figs, title is changed, the manuscript is improved
using the latest experimental data, some figures and references adde
Effects of Fermion Masses and Twisting on Non-Integrable Phases on Compact Extra Dimensions
The effective potential for the Wilson loop in the SU(2) gauge theory with
N_f massive fundamental and N_a massive adjoint fermions on S^1 x M^4 is
computed at the one-loop level, assuming periodic boundary conditions for the
gauge field and general boundary conditions for fermions. It is shown that
there are critical values for the bare mass, and the boundary condition
parameter for the adjoint fermions, beyond which the symmetry pattern changes.
However, neither bare mass, nor the boundary condition parameter for the
fundamental fermion play any role on the vacuum structure, thus the symmetry
breaking pattern. When the two different types of fermions with equal masses
exist together the pattern of the fundamental fermion dominate, and SU(2) gauge
symmetry remains intact independent of the fermion masses.Comment: 21 pages, 28 figures, version to appear in Nucl. Phys.
Dipole coefficients in B -> X_s gamma in supersymmetry with large \tan\beta and explicit CP violation
We perform a detailed study of the electric and chromoelectric dipole
coefficients in B -> X_s \gamma decay in a supersymmetric scheme with explicit
CP violation. In our analysis, we adopt the minimal flavor violation scheme by
taking into account the \tan\beta-enhanced large contributions beyond the
leading order. We show that the coefficients can deviate from the SM prediction
significantly in both real and imaginary directions. Experimental bounds still
allow for large deviations from the SM predictions for both dipole coefficients
such that the CP asymmetry is as large as \pm 8%. There are further
implications of these coefficients for the charmless hadronic and semileptonic
B decays. As a direct application of our analysis, we have discussed \Lambda_b
-> \Lambda \gamma decay.Comment: 14 pp, 13 ps figs, a direct application of the computations is given,
some figures and references are adde
The sensitivity of the zero position of the forward--backward asymmetry to new physics effects in the B -> K^\ast \mu^+ \mu^- decay
Starting with the most general effective Hamiltonian comprising scalar and
vector operators beyond the standard model, we discuss the impact of various
operators on the zero of the forward--backward asymmetry in the dileptonic B
decay B -> K^\ast \mu^+ \mu^-. We find that, zero of the asymmetry is highly
sensitive to the sign and size of the vector--vector operators and opposite
chirality counterparts of the usual operators. The scalar--scalar four--fermion
operators, on the other hand, have mild effect on the zero of the asymmetry.
Our results are expected to be checked in the near future experiments.Comment: 16 pp, 6 ps fig
Path integral quantization of the theory of scalar changed particles interacting via Chern-Simons fields and its applications
Ph.D. - Doctoral Progra
Characterization of glucose isomerase from Geobacillus stearothermophilus AH22 strain
Bu çalışmada, Atatürk Üniversitesi Fen Fakültesi, Moleküler Biyoloji ve Genetik Bölümü araştırmacıları tarafından izole edilen Geobacillus stearothermophilus AH22 suşunun endüstriyel bir enzim olan glukoz izomerazı üretebilme kapasitesi belirlenerek, bu enzimin bazı kinetik verileri ve spektroskopik özellikleri ortaya konuldu. Anahtar Kelimeler: Glukoz ?zomeraz, HFCS, ksiloz In this study, the industrial capacity of Geobacillus stearothermophilus AH22 strain, isolated by researchers in Atatürk University, Faculty of Science, Department of Molecular Biology and Genetics, to produce glucose isomerase and spectroscopic and kinetic properties of the enzyme were investigated. Anahtar Kelimeler: Glukoz ?zomeraz, HFCS, ksilo