Yazar "Alan, Ahmet T." seçeneğine göre listele

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    Single top production at HERA and THERA
    (E D P Sciences, 2002) Alan, Ahmet T.; Şenol, Abdülkadir
    We study the single top production mediated by flavor-changing neutral current via both of the t-q-gamma and t-q-Z vertices (here q represents c and u quarks) in ep collisions at two colliders HERA and THERA. The contribution of the second vertex becomes even more important as the couplings take more improved values provided by the higher luminosities of colliders. In addition to these improvements, if the CM energy of the collider is also increased, the production will be dominated by the anomalous t-q-Z vertex.
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    Squark pair production in the MSSM with explicit CP violation
    (2007) Alan, Ahmet T.; Cankoçak, Kerem; Demir, Durmuş Ayşegül
    We analyze effects of the CP-odd soft phases in the MSSM on the pair productions of colored superpartners in pp collisions at the LHC energies. We find that, among all pair-production processes, those of the scalar quarks in the first and second generations are particularly sensitive to the CP-odd phases, more precisely, to the phases of the gluinos and neutralinos. We compute pair-production cross sections, classify various production modes according to their dependencies on the gluino and neutralino phases, perform a detailed numerical analysis to determine individual as well as total cross sections, and give a detailed discussion of 2. electric dipole moment (EDM) bounds. We find that pair productions of first and second generation squarks serve as a viable probe of the CP violation sources in the gaugino sector of the theory even if experiments cannot determine chirality, flavor and electric charge of the squarks produced. © 2007 The American Physical Society.