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Dive into the research topics where Orhan Cakir is active.

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Featured researches published by Orhan Cakir.


Journal of Physics G | 2002

Impact of energy and luminosity upgrades at LHC on the physics programme of ATLAS

G. Azuelos; Driss Benchekroun; Orhan Cakir; Erik Elfgren; F. Gianotti; Jørgen Beck Hansen; I. Hinchliffe; M. Hohlfeld; K. Jakobs; Claude Leroy; R. Mehdiyev; F. Paige; G. Polesello; Hasko Stenzel; Stefan Tapprogge; Z. Usubov; L. Vacavant

The impact of possible LHC upgrades on the physics capabilities of the ATLAS detector is discussed. As a benchmark, an increase in the luminosity by a factor of 10 is considered. For comparison, the doubling of the LHC energy is also explored. Both upgrades significantly enhance the physics capabilities of ATLAS. Measured in terms of the mass reach for new particles, the energy upgrade is more powerful. However, in cases where the effect of an upgrade is to increase the precision of measurements as a result of larger data samples, the luminosity upgrade can be at least as powerful. The pile-up of minimum bias events at higher luminosity could limit the physics performance of ATLAS in areas where tagging of forward jets is needed.


Journal of High Energy Physics | 2002

A Search for Vector Diquarks at the CERN LHC

E. Arik; S. A. Cetin; Orhan Cakir; S. Sultansoy

Resonant production of the flrst generation vector diquarks at the CERN Large Hadron Collider (LHC) is investigated. It is shown that the LHC will be able to discover vector diquarks with masses up to 9TeV for quark-diquark-quark coupling fiD = 0:1 and 4TeV for fiD = 5£ 10 i4 .


Journal of Physics G | 2003

Anomalous production of top quarks at CLIC+LHC based γp colliders

Orhan Cakir

The single production of a top quark due to flavour-changing neutral current (FCNC) interaction and its decay to bW are studied at CLIC+LHC based γp colliders. We consider both tcγ and tuγ anomalous couplings. The charm (up) quark anomalous coupling parameter κcγ(κuγ) can be probed down to 9.5 × 10−3 (8.0 × 10−3) at a γp collider with √sep = 6.48 TeV and Lint = 100 fb−1.


New Journal of Physics | 2006

Production of doubly charged Higgs bosons at linear e− e− colliders

Orhan Cakir

Production of doubly charged Higgs bosons via the s-channel process e−e−→ H–→ l−l− at future linear collider energies is studied by taking into account initial state radiation (ISR) and beamstrahlung (ISR+BS), final state radiation (FSR) and detector smearing effects. The discovery bounds of lepton flavour conserving and violating couplings are obtained for doubly charged Higgs bosons. It is found that future linear colliders with centre of mass energies and will be able to probe the doubly charged Higgs bosons with diagonal couplings down to 10−4 and 10−3, respectively.Production of doubly charged Higgs bosons via the s-channel process e?e?? H?? l?l? at future linear collider energies is studied by taking into account initial state radiation (ISR) and beamstrahlung (ISR+BS), final state radiation (FSR) and detector smearing effects. The discovery bounds of lepton flavour conserving and violating couplings are obtained for doubly charged Higgs bosons. It is found that future linear colliders with centre of mass energies and will be able to probe the doubly charged Higgs bosons with diagonal couplings down to 10?4 and 10?3, respectively.


Journal of Physics G | 2005

Anomalous single top quark production at the CERN LHC

Orhan Cakir; S. A. Cetin

Production of single top quarks via the anomalous interaction u(c)g → t, and its decay to W + b are studied for the CERN LHC ATLAS experiment. The sensitivity to anomalous coupling κ/Λ down to 0.024 TeV−1 can be achieved.


arXiv: High Energy Physics - Phenomenology | 2007

Study of Metastable Staus at Linear Colliders

Orhan Cakir; Ilkay T. Cakir; John Ellis; Zerrin Kirca


arXiv: High Energy Physics - Phenomenology | 2007

Measurements of Metastable Staus at Linear Colliders

Orhan Cakir; Ilkay T. Cakir; John Ellis; Zerrin Kirca


arXiv: High Energy Physics - Phenomenology | 2006

Observability of the Higgs boson in the presence of extra standard model families at the Tevatron

E. Arik; Orhan Cakir; S. A. Cetin; S. Sultansoy


Archive | 2008

Fourth SM family and higgs at hadron colliders

E. Arik; Orhan Cakir; Serkant Ali Çetin; S. Sultansoy


Journal of Physics G | 2005

RESEARCH NOTE FROM COLLABORATION: Anomalous single top quark production at the CERN LHC

Orhan Cakir; S. A. Cetin

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E. Arik

Boğaziçi University

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Claude Leroy

Université de Montréal

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Erik Elfgren

Université de Montréal

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G. Azuelos

Université de Montréal

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Jørgen Beck Hansen

National Technical University of Athens

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