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On pair production of scalar top quarks in e + e − collisions at ILC and a possibility of their mass reconstruction

  • Physics of Elementary Particles and Atomic Nuclei. Theory
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Abstract

We study pair production of scalar top quarks (stop, \( \tilde t_1 \)) in e + e − collisions with the subsequent decay of the top squarks into b quarks and charginos \( \tilde t_1 \to b\tilde \chi _1^ \pm \). We simulate this process by using PYTHIA6.4 for the beam energy 2E b = \( \sqrt 2 \) = 350, 400, 500, 800, 1000 GeV. A set of criteria for physical variables is proposed, which provides good separation of stop signal events from top quark pair production being the main background. These criteria allow us to reconstruct the mass of the top squark with an integrated luminosity of 1000 fb−1 provided that the neutralino mass is known.

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Authors and Affiliations

  1. Faculty of Physics, University of Vienna, Vienna, Austria

    A. Bartl

  2. AHEP Group, Instituto de Fisica Corpuscular—C.S.I.C., Universidad de Valencia, Edificio Institutos de Investigacion, Valencia, Spain

    A. Bartl

  3. Institute for High Energy Physics (HEPHY Vienna), Vienna, Austria

    W. Majerotto

  4. DESY, Zeuthen, Germany

    K. Mönig

  5. Joint Institute for Nuclear Research, Dubna, Russia

    A. N. Skachkova & N. B. Skachkov

Authors
  1. A. Bartl
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  2. W. Majerotto
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  3. K. Mönig
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  4. A. N. Skachkova
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  5. N. B. Skachkov
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Bartl, A., Majerotto, W., Mönig, K. et al. On pair production of scalar top quarks in e + e − collisions at ILC and a possibility of their mass reconstruction. Phys. Part. Nuclei Lett. 6, 181–189 (2009). https://doi.org/10.1134/S1547477109030017

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  • DOI: https://doi.org/10.1134/S1547477109030017

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