Browsing by Author "Akkuş, B."

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Correlation of radon and thoron concentrations with natural radioactivity of soil in Zonguldak, Turkey
(Amer Inst Physics, 2017) Koray, Abdullah; Akkuş, B.; Öktem, Y.; Doğan, G. S.; Güzelçimen, F.; Akkaya, Gizem; Kahraman, Ayşegül; Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Fizik Bölümü.; 0000-0002-1836-7033; AAH-8784-2021; AAH-6441-2021; 18036694200; 47161190600
Radon and thoron gases are produced by the decay of the radioactive elements those are radium and thorium in the soil. In this study, the correlations between soil radon and thoron concentration with their parent nuclide (Ra-226 and Th-232) concentrations in collected soil samples from the same locations were evaluated. The result of the measurement shows that the distribution of radon and thoron in soil showed the same tendency as Ra-226 and Th-232 distribution. It was found a weak correlation between the radon and the Ra-226 concentration (R =0.57), and between the thoron and the Th-232 concentration (R=0.64). No strong correlation was observed between soil-gas radon and thoron concentration (R=0.29).
Detector design studies for Turkish accelerator center
(Amer Phyical Society, 2017) Akkuş, B.; Öktem, Y.; Doğan, G. S.; Güzelçimen, F.; Aksu, Burçin; Piliçer, Ercan; Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Fizik Bölümü.; EJO-3857-2022; DOH-4800-2022; 57193712936; 15843878300
The proposed Particle Factory detector at Turkish Accelerator Center (TAC-PF) aims to search for charm physics, CP violation and mixing of D-0 mesons as well as new physics effects by investigating head-on collisions of 1 GeV electron from Energy Recovery Linac (ERL) with 3.56 GeV positrons from synchrotron storage ring. In this work, we constructed the TAC-PF detector design by using a recently developed framework namely Detector Description for High Energy Physics (DD4hep). The baseline TAC-PF detector design and its qualifications were summarized, followed by a general description.
Lepton flavor violating higgs decays in supersymmetric models
(Amer Inst Physics, 2017) Hammad, Ahmed; Khalil, Shaaban; Akkuş, B.; Öktem, Y.; Doğan, G. S.; Güzelçimen, F.; Ün, Cem Salih; Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Fizik Bölümü.; 0000-0002-0595-8803; N-3421-2014; 55325758100
The ATLAS and CMS collaborations reported the first signal of Lepton Flavor Violating (LFV) Higgs decay into tau and mu leptons. Standard Model forbids such processes at the renormalizable level because of lepton flavor symmetry. On the other hand, many extensions of the Standard Model do not exhibit such a symmetry and the models beyond the Standard Model (BSM) yield such processes. Hence, any signal for LFV processes can be interpreted as a direct probe for the BSM models. In this work, we consider LFV Higgs boson decays in a class of supersymmetric models including minimal supersymmetric extension of the SM (MSSM), Supersymmetric Type I Seesaw, and U(1)(B-L) extended MSSM supplied with the inverse seesaw mechanism for non-zero neutrino masses.
Light Higgs bosons and muon g-2 in THDM
(Amer Inst Physics, 2017) Akkuş, B.; Öktem, Y.; Doğan, G. S.; Güzelçimen, F.; Niş, Büşra; Cici, Ali; Ün, Cem Salih; Kırca, Zerrin; Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Fizik Bölümü.; 0000-0002-0595-8803; 0000-0001-5217-9290; AAH-8661-2021; N-3421-2014; 57193708148; 57193713979; 55325758100; 6508185203
As well as having a significant impact on models beyond the Standard Model, the Higgs boson discovery has opened a new era in both experimental and phenomenological searches. For instance, observed anomalies in Higgs decays into two photons and four leptons and muon anomalous magnetic moment (muon g - 2) may imply more Higgs-like scalars. In this work, we study Two Higgs Doublet Model-TypeIII, in which one Higgs doublet develops a zero vacuum expectation value. we find the mass spectrum include five Higgs bosons each of which is lighter than about 350 GeV. We consider the contributions to muon g - 2 from these light extra Higgs bosons, and we find that the discrepancy between the SM and the experimental measurements can be resolved if m(H), m(A), m(H perpendicular to) less than or similar to 150 GeV.
Probing the littlest higgs model in e(-) e(+) -> W-H(+) (T)over-bar b process
(Amer, 2017) Akkuş, B.; Öktem, Y.; Doğan, G. S.; Güzelçimen, F.; Altın, Zafer; Kırca, Zerrin; Ün, Cem Salih; Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Fizik Bölümü.; 0000-0002-0595-8803; AAH-8661-2021; N-3421-2014; 57193712940; 6508185203; 55325758100
In this work associated production of heavy W boson, heavy top quark and bottom quark in the framework of Littlest Higgs Model at high energy e(-) e(+) colliders and decay widths of heavy particles are analyzed. Detecting possibility of these new heavy particles in Littlest Higgs Model depend on free parameters which are constrained by the electroweak precision measurements. Production cross section of heavy W boson, heavy top quark and bottom quark is calculated at root s = 3 TeV and yearly integrated luminosity of L = 500 fb(-1)Achieving a statistical significance of 50-restricts the model in a narrow region with s/s' = 0.8/0.6, 0.7, 0.35 <= x(L) <= 0.6 and f <= 1.06 TeV.
Production of scalar and vector bileptons in polarized e(-)gamma and gamma gamma colliders
(Amer Inst Physics, 2017) Akkuş, B.; Öktem, Y.; Doğan, G. S.; Güzelçimen, F.; Kırca, Zerrin; Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Fizik Bölümü.; AAH-8661-2021; 6508185203
We study the production of doubly charged scalar and vector bileptons which are predicted several beyond the Standard Model scenarios, in polarized high energy e gamma and gamma gamma collisions with the photon originating from Compton backscattering. We analyze the discovery potential and show how the use of polarized beams is to distinguish between scalar and vector bileptons in model-independent framework.
Simulation of radiation environment for the LHeC detector
(Amer Inst Physics, 2017) Joya, Musa; Akkuş, B.; Öktem, Y.; Doğan, G. S.; Güzelçimen, F.; Nayaz, Abdullah; Piliçer, Ercan; Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Fizik Bölümü.; 57193714041; 15843878300
The detector response and simulation of radiation environment for the Large Hadron electron Collider (LHeC) baseline detector is estimated to predict its performance over the lifetime of the project. In this work, the geometry of the LHeC detector, as reported in LHeC Conceptual Design Report (CDR), built in FLIJKA Monte Carlo tool in order to simulate the detector response and radiation environment. For this purpose, events of electrons and protons with high enough energy were sent isotropically from interaction point of the detector. As a result, the detector response and radiation background for the LHeC detector, with different USRBIN code (ENERGY, HADGT20M, ALL-CHAR, ALL-PAR) in FLUKA, are presented.
Stop search with acceptable fine-tuning in Susy models
(Amer Phyical, 2017) Akkuş, B.; Öktem, Y.; Doğan, G. S.; Güzelçimen, F.; Çiçi, Ali; Ün, Cem Salih; Kırca, Zerrin; Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Fizik Bölümü.; 0000-0002-0595-8803; N-3421-2014; AAH-8661-2021; 57193713979; 55325758100; 6508185203
Supersymmetry (SUSY) is one of the forefront candidates for the models beyond the Standard Model (SM) in resolving the gauge hierarchy problem by proposing new supersymmetric partners for the SM fields. In SUSY, stop, the supersymmetric partner of top quark, is of a special importance, since it cancels the largest quadratic contributions to the Higgs boson mass from top quark loop. Despite heavy stop mass requirement from the Higgs boson searches and fine-tuning demands, it is still possible to find stops of mass about a few hundred GeV, even as light as top quark. In this study, we search for light stop solutions within the SUSY Grand Unified Theory (GUT) models in light of acceptable fine-tuning and current experimental constraints. Afterwards, we analyze the possible signals through which the implications can be tested at the Large Hadron Collider (LHC) experiments.