The inclusive semileptonic decays of the b-meson in a cp softly broken two higgs doublet model

Acar, Hilal
In this work, the B->Xdl+ld-decays are examined in the context of a CP softly broken two Higgs doublet model. The differential branching ratio, forward-backward asymmetry, CP-violating asymmetry, CP-violating asymmetry in the forward-backward asymmetry and polarization asymmetries of the final lepton in this decay are studied. The dependencies of these physical parameters on the model parameters are analyzed by paying a special attention to the effects of neutral Higgs boson (NHB) exchanges and possible CP violating effects. It has been found that NHB effects are quite significant for the \tau mode and the above-mentioned observables seems to be promising as a testing ground for new physics beyond the SM, especially for the existence of the CP-violating phase in the theory.


Scalar mesons in radiative phi-meson decays into neutral k-meson states
Korkmaz (Şişman), Canan; Yılmaz, Osman; Department of Physics (2006)
Radiative Decays of the phi-meson to the scalar mesons f0(980) and a0(980) are investigated within the framework of charged kaon loop model for both point-like scalar mesons and for scalar mesons with extended structure. Then, the radiative phi-meson decay into neutral K-meson is studied via a two step mechanism in which the scalar mesons couple the final state to the phi-meson through the charged kaon loop. The branching ratio of this decay is calculated and it is shown that this reaction will not provide ...
Search for scalar and tensor unparticles in the diphoton final state in cms experiment at the lhc
Akın, Ilina Vasileva; Zeyrek, Mehmet Tevfik; Department of Physics (2009)
We present a search for scalar and tensor unparticles in the diphoton final state produced in pp collisions at a center-of-mass energy of 10 TeV, with the CMS detector at LHC. The analysis focuses on the data sample corresponding to the integrated luminosity of 100 pb−1, expected to be collected in the first LHC run. The exclusion limits on unparticle parameters, scaling dimension dU and coupling constant lambda, and the discovery potential for unparticles are presented. This is the first simulation study o...
Analysis of kappa meson in light cone QCD sum rules
Baytemir, Gülsen; Yılmaz, Osman; Saraç, Yasemin; Department of Physics (2011)
In the present work some hadronic properties of the scalar κ meson are studied. Using the QCD sum rules approach, which is a nonperturbative method, the mass and the overlap amplitude of this meson are calculated. As well as the mass and the overlap amplitude, κ → K^+π^− decay is also studied. For this decay the coupling constant g_κK^+π^− is obtained using light cone QCD sum rules which is an extension of the QCD sum rules method. Moreover, the coupling constant is calculated using the experimental decay w...
The aniıhilation cross section of the dark matter which ıs driven by scalar unparticle
Iltan, E. O. (2013-08-01)
We analyze the annihilation cross section of the Dark Matter which interacts with the Standard Model sector over the scalar unparticle propagator. We observe that the annihilation cross section of the dark matter pair is sensitive to the dark matter mass and the scaling dimension of scalar unparticle. We estimate a range for the dark matter mass and the scaling dimension of scalar unparticle by using the current dark matter abundance.
Cagil, A.; Zeyrek, Mehmet Tevfik (Jagiellonian University, 2011-01-01)
In this work, the production processes of heavy neutral scalar and pseudoscalar associated with standard model gauge boson Z(L) at future e(+)e(-) colliders (ILC and CLIC) are examined. The total and differential cross-sections are calculated for the processes in the context of the littlest Higgs model. Dependence of production processes to littlest Higgs model parameters in the range of compatibility with electroweak precision measurements and decays to lepton-flavor violating final states are also analyze...
Citation Formats
H. Acar, “The inclusive semileptonic decays of the b-meson in a cp softly broken two higgs doublet model,” M.S. - Master of Science, Middle East Technical University, 2004.