Browsing by Author "Demir, Durmuş Ali"
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Conformal transformations in metricaffine gravity and ghosts
Karahan, Canan Nurhan; Doğangün, Oktay; Demir, Durmuş Ali (WileyVCH Verlag, 201208)Conformal transformations play a widespread role in gravity theories in regard to their cosmological and other implications. In the pure metric theory of gravity, conformal transformations change the frame to a new one ... 
Conformal transformationsin metricaffine gravity
Düztürk, Canan Nurhan (İzmir Institute of Technology, 2010)Conformal transformations play a widespread role in gravitation in regard to their cosmological and the other implications. In this thesis, the effects of conformal transformations on General Relativity comparatively in ... 
Correlating μ parameter and righthanded neutrino masses in N = 1 supergravity
Demir, Durmuş Ali; Farzan, Yasaman (Springer, 200603)The minimal supersymmetric standard model, when extended to embed the seesaw mechanism, obtains two dimensionful parameters in its superpotential: the μ parameter and the righthanded neutrino mass MN. These mass parameters, ... 
Cosmological implications of affine gravity
Azrı, Hemza (İzmir Institute of Technology, 201804)The main aim of this thesis is to reveal some interesting aspects of the purely affine theory of gravity and its cosmological implication. A particular attention will be devoted to its consequences when applied to cosmological ... 
CurvatureRestored gauge invariance and ultraviolet naturalness
Demir, Durmuş Ali (Hindawi Publishing Corporation, 2016)It is shown that (aΛ2+bH2)R in a spacetime of curvature R is a natural ultraviolet (UV) completion of (aΛ4+bΛ2H2) in the flatspacetime Standard Model (SM) with Higgs field H, UV scale Λ, and loop factors a and b. This ... 
Dark matter from conformal sectors
Demir, Durmuş Ali; Frank, Mariana; Korutlu, Beste (Elsevier, 2014)We show that a conformalinvariant dark sector, interacting conformally with the Standard Model (SM) fields through the Higgs portal, provides a viable framework where cold dark matter (CDM) and invisible Higgs decays can ... 
Determination of jet energy calibration and transverse momentum resolution in CMS
CMS Collaboration; Demir, Durmuş Ali (IOP Publishing, 201111)Measurements of the jet energy calibration and transverse momentum resolution in CMS are presented, performed with a data sample collected in protonproton collisions at a centreofmass energy of 7TeV, corresponding to ... 
Dijet azimuthal decorrelations in pp collisions at √s=7TeV
CMS Collaboration; Demir, Durmuş Ali (American Physical Society, 201103)Measurements of dijet azimuthal decorrelations in pp collisions at √s=7TeV using the CMS detector at the CERN LHC are presented. The analysis is based on an inclusive dijet event sample corresponding to an integrated ... 
Dirac neutrino masses from generalized supersymmetry breaking
Demir, Durmuş Ali; Everett, Lisa L.; Langacker, Paul (American Physical Society, 200803)We demonstrate that Dirac neutrino masses in the experimentally preferred range are generated within supersymmetric gauge extensions of the standard model with a generalized supersymmetry breaking sector. If the superpotential ... 
Doubly charged Higgsinos at LHC
Demir, Durmuş Ali; Frank, Mariana; Huitu, Katri; Rai, Santosh Kumar; Turan, İsmail (Proceedings of Science, 2008)We review single and pair production and subsequent decay of doubly charged Higgsinos of the leftright supersymmetric model at the LHC. The novel signature is possible to separate from the MSSM and UED signal. 
Doubly charged Higgsinos at the Tevatron
Demir, Durmuş Ali; Frank, Mariana; Ghosh, Dilip Kumar; Huitu, Katri; Rai, Santosh Kumar; Turan, İsmail (American Physical Society, 200905)Several supersymmetric models with extended gauge structures, motivated by either grand unification or by neutrino mass generation, predict light doubly charged Higgsinos. In this work we study the signals of doubly charged ... 
Effects of curvatureHiggs coupling on electroweak finetuning
Demir, Durmuş Ali (Elsevier, 201406)It is shown that nonminimal coupling between the Standard Model (SM) Higgs field and spacetime curvature, present already at the renormalizable level, can be finetuned to stabilize the electroweak scale against powerlaw ... 
Effects of dark photons on pulsar kicks
Tosun, Onur (İzmir Institute of Technology, 2012)Several studies that have been carried out on supernova explosions and their remnants (pulsars) so far ended up with two fundamental problems: How are the lefthanded neutrinos released out of the star and how do the ... 
Entropic tunneling time and its applications
Güner, Tuğrul (İzmir Institute of Technology, 2014)Quantum tunneling is one of the most interesting consequences of quantum behaviour. However, even though it is known and understood well, due to nonexistence of a time operator in quantum mechanics, estimating what time ... 
Family nonuniversal U(1)' model
Hayreter, Alper (İzmir Institute of Technology, 2008)This thesis work is devoted to an analysis of dilepton signatures of family nonuniversal U(1)' model. We first provide a brief overview of Standard Model of particle physics and Supersymmetry then we give an introduction ... 
Fine synchronization of the CMS muon drifttube local trigger using cosmic rays
Demir, Durmuş Ali; CMS Collaboration (IOP Publishing, 2010)The CMS experiment uses selftriggering arrays of drift tubes in the barrel muon trigger to perform the identification of the correct bunch crossing. The identification is unique only if the trigger chain is correctly ... 
Flavor violation in supersymmetry
Çakır, Muammer Altan (İzmir Institute of Technology, 2006)This thesis work is meant as an introduction to supersymmetry and its phenomenological implications for the basic features of the standard model of electroweak interactions, it continues with a through denition and basic ... 
Forward energy flow, central chargedparticle multiplicities, and pseudorapidity gaps in W and Z boson events from pp collisions at √s = 7 TeV
Demir, Durmuş Ali; CMS Collaboration (Springer, 201201)A study of forward energy flow and central chargedparticle multiplicity in events with W and Z bosons decaying into leptons is presented. The analysis uses a sample of 7 TeV pp collisions, corresponding to an integrated ... 
General tensor Lagrangians from the gravitational Higgs mechanism
Demir, Durmuş Ali; Pak, Namık Kemal (IOP Publishing, 200904)The gravitational Higgs mechanism proposed by 't Hooft in arXiv:0708.3184 involves the spacetime metric gμv as well as the induced metric ḡμν oc ηab∂μΦ a∂νφb where φ(a = 0,..., 3), as we call it, break all four diffeomorphisms ... 
Generalized modified gravity in large extra dimensions
Aslan, Önder; Demir, Durmuş Ali (Elsevier, 200604)We discuss effective interactions among brane matter induced by modifications of higherdimensional Einstein gravity through the replacement of EinsteinHilbert term with a generic function f ( R, RA B RA B, RA B C D RA B ...