Browsing by Author "Cakir I.T."

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Anomalous HZγ couplings in photon-induced collisions at the LHC
(2014-11-30) Senol A.; Tasci A.T.; Cakir I.T.; Cakir O.
We examined HZγ vertex and obtained the limits on anomalous aγ, bγ and bγ couplings in a model-independent way through the ?p collisions via the process pp → pγp → pHqX. The sensitivities to the anomalous couplings can be obtained as |bγ|, | bγ| 10-3 for the integrated luminosity of Lint = 100 fb-1 at the LHC with √s = 13 TeV.
Associated production of different flavor heavy quarks through W bosons at the LHC
(2013-02-01) Cakir I.T.; Senol A.; Tasci A.T.
Associated production of different flavor heavy quarks can provide a probe for W' bosons at the LHC. We study pp → t'b̄' X process with the subsequent decays t' → W+b and b̄' → W -W+b̄, and compare the results with the tb̄ final state. The effects of the W' boson to the different flavor pair production cross section are shown to be important in some parameter region for the heavy quark masses of 600 and 700 GeV. We present accessible mass limits for the W' boson at the LHC with √s = 14 TeV.
Associated production of single top quark and W boson through anomalous couplings at LHeC based γp colliders
(2014-02-10) Cakir I.T.; Senol A.; Tasci A.T.
We consider the production of a single top quark in association with a W boson at LHeC based γp collider. We compute the cross-section for the process γp→WtX with the anomalous Wtb and Wtbγ couplings. We find that the sensitivities to anomalous couplings of top quark are shown to be comparable, even better than the ones obtained from direct searches at hadron colliders. © 2014 World Scientific Publishing Company.
Search for anomalous WWγ and WWZ couplings with polarized E-beam at the LHeC
(2014-10-01) Cakir I.T.; Cakir O.; Senol A.; Tasci A.T.
We examine the possibility of constraining the anomalous WWγ and WWZ couplings by measuring total cross sections of the ep → νeqγX and ep → νeqZX processes at the LHeC collider with the electron beam energy Ee = 60 GeV and Ee = 140 GeV. We consider the cases of unpolarized and polarized electron beams. The difference of the upper and lower bounds on the anomalous couplings, (δ Δκγ,δλγ) and (δ Δκz,δλz) are obtained as (0:990, 0:122) and (0:362, 0:012) without electron beam polarization at the beam energy of Ee = 140 GeV for an integrated luminosity of Lint = 100 fb-1, respectively. With the possibility of e-beam polarization, we obtain more improved results as (0:975, 0:118) and (0:285, 0:009) for (δ Δκγ,δλγ) and (δ Δκz,δλz), respectively. The results are found to be comparable with the current experimental limits obtained from two-parameter fits to the data collected in the lepton and hadron colliders. It is found that the limits on the anomalous couplings (Δκz,δλz) through the process ep → νeqZX at the LHeC can further improve the current experimental limits.