Levent Solmaz

Phenomenological issues in supersymmetry with nonholomorphic soft breaking

We present a through discussion of motivations for and phenomenological issues in supersymmetric models with minimal matter content and nonholomorphic soft-breaking terms. Using the unification of the gauge couplings and assuming SUSY is broken with nonstandard soft terms, we provide semianalytic solutions of the RGEs for low and high choices of tan{beta} which can be used to study the phenomenology in detail. We also present a generic form of RGIs in mSUGRA framework which can be used to derive new relations in addition to those existing in the literature. Our results are mostly presented with respect to the conventional minimal supersymmetric model for ease of comparison.

A Simple approach to fourth generation effects in B ---> X(s)l+l- decay

In a scenario in which fourth generation fermions exist, we study effects of new physics on the differential decay width, forward-backward asymmetry

Higgs boson masses in the MSSM with general soft breaking

A_{\text{FB}}

Tevatron Higgs Mass Bounds: Projecting U(1)' Models to LHC Domain

and integrated branching ratio for

Electric dipole moments in U ( 1 ) ′ models

B\to X_s \ell^+ \ell^-

LEP Indications for Two Light Higgs Bosons and U(1) ' Model

decay with

Effects of supersymmetric threshold corrections on high-scale flavour textures

(\ell=e,\mu)

Least Fine-Tuned U(1) Extended SSM

. Prediction of the new physics on the mentioned quantities essentially differs from the Standard Model results, in certain regions of the parameter space, enhancement of new physics on the above mentioned physical quantities can yield values as large as two times of the SM predictions, whence present limits of experimental measurements of branching ratio is spanned, contraints of the new physics can be extracted. For the fourth generation CKM factor

LEP indications for two light Higgs bosons and U(1)-prime model

V_{t^\prime b}^\ast V_{t^\prime s}

Generalized Soft Breaking Leverage for the MSSM

we use