16 research outputs found
Muon anomalous magnetic moment constraints on supersymmetric<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="bold">U</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>1</mml:mn><mml:msup><mml:mo stretchy="false">)</mml:mo><mml:mo>′</mml:mo></mml:msup></mml:math>models
No full textWe study the anomalous magnetic moment of the muon in supersymmetric E 6 models and generic U(1)′ models to probe the model reactions and to find constraints on the large parameter space of these models. For future searches, by imposing the existing bounds coming from collider searches and theoretical considerations upon the U(1)′ model parameters, we examine the lightest Higgs boson mass mh and the mass of the additional Z boson mZ2 in such singlet extensions of the MSSM. We observed that not only supersymmetric E6 models but also generic U(1)′ models are sensitive to the imposition of the considered bounds. Indeed, without the muon anomaly constraints E6 models and generic U(1)′ models can predict mh as large as ∼150GeV and ∼180GeV, respectively. However, in addition to the mentioned constraints when a 1σ range for the anomalous magnetic moment of the muon is considered, we observe that generic U(1)′ models do not favor the mass of the lightest Higgs boson to be larger than 140 GeV; it should be smaller than 135 GeV in E6 models. © 2010 The American Physical Societ
Associated production of charged higgs boson and heavy top quark in the left-right twin higgs model at high energye-e+ collider
No full textBu çalışma, Ağustos 26-30, 2018 tarihleri arasında Sofia[Bulgaristan]’da düzenlenen 10. Jubilee Conference of the Balkan-Physical-Union (BPU)’da bildiri olarak sunulmuştur.The left-right twin Higgs (LRTH) model is a concrete realization of the twin Higgs mechanism, which predicts the existence of a new heavy top quark (T) and charged Higgs boson (phi(+/-)). Detecting of these new particles in the LRTH model depends on free parameters (f, (f) over cap, M) which are constrained by the electroweak precision measurments. We study the associated production of a charged Higgs boson (phi(+)) and a heavy top quark (T) via e(-)e(+) -> phi(+)(T) over barb in the framework the LRTH model at root s=3000 GeV and yearly integrated luminosity of L=500 fb(-1). We find that the production cross section of the process e(-)e(+)-> phi(+)(T) over barb can reach to the level of several tens fb and a statical significance of 5 sigma can be achieved in the suitable parameter space of the LRTH model at root s=3000 GeV.Balkan Phys UnionEuropean Phys SocMinist Educ & Sci BulgariaBulgarian Nucl Regulatory AgcyUniv Sofia St Clement OhridKozloduy Nucl Power PlantBulgarian Air Traff Serv Autho
Measurements of Metastable Staus at Linear Colliders
No full textWe consider scenarios in which the lightest sparticle (LSP) is the gravitino and the next-to-lightest sparticle (NLSP) is a metastable stau. We examine the production of stau pairs in e^{+}e^{-} annihilation at ILC and CLIC energies. In addition to three minimal supergravity (mSUGRA) benchmark scenarios proposed previously, we consider a new high-mass scenario in which effects catalyzed by stau bound states yield abundances of {6,7}Li that fit the astrophysical data better than standard Big-Bang nucleosynthesis. This scenario could be probed only at CLIC energies. In each scenario, we show how the stau mixing angle may be determined from measurements of the total stau pair-production cross sections with polarized beams, and of the tau polarization in stau decays. Using realistic ILC and CLIC luminosity spectra, we find for each scenario the centre-of-mass energy that maximizes the number of staus with \beta \gamma < 0.4, that may be trapped in a generic detector. The dominant sources of such slow-moving staus are generically the pair production and cascade decays of heavier sparticles with higher thresholds, and the optimal centre-of-mass energy is typically considerably beyond 2 m_{\tilde\tau_1}.We consider scenarios in which the lightest sparticle (LSP) is the gravitino and the next-to-lightest sparticle (NLSP) is a metastable stau. We examine the production of stau pairs in e^{+}e^{-} annihilation at ILC and CLIC energies. In addition to three minimal supergravity (mSUGRA) benchmark scenarios proposed previously, we consider a new high-mass scenario in which effects catalyzed by stau bound states yield abundances of {6,7}Li that fit the astrophysical data better than standard Big-Bang nucleosynthesis. This scenario could be probed only at CLIC energies. In each scenario, we show how the stau mixing angle may be determined from measurements of the total stau pair-production cross sections with polarized beams, and of the tau polarization in stau decays. Using realistic ILC and CLIC luminosity spectra, we find for each scenario the centre-of-mass energy that maximizes the number of staus with \beta \gamma < 0.4, that may be trapped in a generic detector. The dominant sources of such slow-moving staus are generically the pair production and cascade decays of heavier sparticles with higher thresholds, and the optimal centre-of-mass energy is typically considerably beyond 2 m_{\tilde\tau_1}
The Problematic of Reading Generic Signals in Parodic Discourse
No full textThe aim of this study is to analyze the double-function of generic signals in double-voiced
discourse of parody which involves by its nature the parodied and the parodying voices
simultaneously. The paper claims that generic signals, which are supposed to be working
mostly at an unconscious level to create a generic context for the reader in interpreting
a text, become double-voiced by the parodist’s manipulation and work at a conscious level.
It is common that the parody writer barrows and appropriates generic signals of the
genre he parodies to indicate the parodied genre and also his departure from this genre.
Parodic intentions become palpable immediately with the „parodic stylization” — to use
Bakhtin’s term — of the generic signals, which brings about the Bakhtinian refraction
of the authorial voice in parody. Since the parody writer intentionally appropriates the
speech of the prodied genre, authorial refractions become clearer in parodic discourse.
Through studying such refractions with a particular emphasis on genre parodies and
specific examples from Cervantes’ Don Quijote, the present study argues that generic
signals in parodic discourse assume the double-function of signaling the parodied genre
and the parodying voice simultaneously. In order to show how generic signals assume
a highly communicative function in parody, this study focuses on texts where the author
parodies not a single writer and a single work, but a whole genre with its conventions.
As a genre parody which aims for the governing discourse behind the genre it imitates,
Cervantes’ Don Quijote produce significant examples that the double-function of generic
signals can be seen explicitly through the authorial refractions in the text
The impact of crystal length on calorimeter energy resolution
No full textBu çalışma, 04-08, Eylül 2019 tarihlerinde Bodrum[Türkiye]’de düzenlenen 35. International Physics Congress of the Turkish-Physical-Society (TPS) Kongresi‘nde bildiri olarak sunulmuştur.Lutetium-yttrium oxyorthosilicate (LYSO) crystal scintillators were originally developed for medical applications. Owing to their high density, small Moliere radius, fast response, and high radiation hardness, LYSO crystals have also suitable for future homogeneous electromagnetic calorimeters. Due to these features, LYSO is considered to be used for the electromagnetic calorimeter part of the Turkish Accelerator Center Particle Factory (TAC-PF) detector. In this research, by employing the GEANT4 toolkit program, we simulated a set of crystal, and their energy resolutions were obtained for different lengths at the energy range of 50 MeV - 2 GeV. Depending on the crystal length, contributions to the constant term of the energy resolution were investigated.Türk Fizi
Stop search in SUSY SO(10) GUTs with nonuniversal Gaugino masses
No full textWe explore the stop mass and its possible probe through a set of three different signal processes within a class of SUSY GUTs with non-universal gaugino masses. The stop mass can be realized in a wide range (0.4–8 TeV) consistent with the current experimental constraints. We consider the decay processes; , and to be possible signals, and explore the impact of the current experimental results as well as the possible mass scales of stop, which can be probed in the future collider experiments. We find that the first and third signal processes can be tested in the current experiments, and significantly probed in future, while the second signal process is not available for the current experiments in this class of SUSY GUTs. We also comment that the second signal process can be available to be tested when the collider experiments are conducted at high center of mass energies and luminosity
