arXiv subjects

Muge Boz

Publications and source records attributed to Muge Boz.

8 recordsLinked to original sources

arXiv2006

The Neutralino Mass: Correlation With The Charginos

As the fundamental SU(2) supersymmetric parameters can be determined in the chargino sector, and the remaining fundamental parameters of the minimal supersymmetric extensions of the standard model can be analyzed in the neutralino sector, the two sectors can be correlated via these parameters. We have shown that for the CP conserving case, the masses of all the neutralinos can be determined in terms of the chargino masses, and $\tanβ$. In this case the neutralino masses are quite insensitive to the variations of $\tanβ$; they change by about $%15$ when $\tanβ$ varies in the range from 5 to 50. In the CP violating case, the neutralino masses are found to be quite sensitive to the variations of the CP violating phase. For the heavier neutralinos the dependence of the masses to the CP violating phase show complementary behaviour at CP violating points.

hep-ph↗

arXiv2005

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.

hep-ph↗

arXiv2004

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.

hep-ph↗

arXiv2003

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 μand strong CP problems. The trilinear coupling phases, and \tanβ-|μ| are strongly correlated, particularly in the low-\tanβregime. 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.

hep-ph↗

arXiv2002

The sensitivity of the zero position of the forward--backward asymmetry to new physics effects in the B -> K^\ast μ^+ μ^- 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 μ^+ μ^-. 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.

hep-ph↗

arXiv2002

The CP properties of the lightest Higgs boson with sbottom effects

In the framework of the recently proposed gluino-axion model, using the effective potential method and taking into account the top-stop as well as the bottom-sbottom effects, we discuss the CP--properties of the lightest Higgs boson, in particular its CP--odd composition, which can offer new opportunities at collider searches. It is found that although the CP-odd composition of the lightest Higgs increases slightly with the inclusion of the sbottom effects, it never exceeds %0.17 for all values of the renormalization scale Q ranging from top mass to TeV scale

hep-ph↗

arXiv2002

Dipole coefficients in B -> X_s gamma in supersymmetry with large \tanβand explicit CP violation

We perform a detailed study of the electric and chromoelectric dipole coefficients in B -> X_s γdecay in a supersymmetric scheme with explicit CP violation. In our analysis, we adopt the minimal flavor violation scheme by taking into account the \tanβ-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 Λ_b -> Λγdecay.

hep-ph↗

arXiv2002

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.

hep-ph↗