Search for pair production of the scalar top quark in muon+tau final states

• Published in: arXiv.org 2012-02
• Main Authors: Aoki, M, Augsten, K, Avila, C, Bandurin, D V, Bartlett, J F, Bazterra, V, Belanger-Champagne, C, Bellantoni, L, Beuselinck, R, Bhat, P C, Blazey, G, Buehler, M, Burdin, S, Cho, S W, Cooper, W E, Croc, A, Deterre, C, Diehl, H T, Ding, P F, Dominguez, A, Eads, M, Edmunds, D, Ellison, J, Elvira, V D, tner, M, Fuess, S, Garcia-Guerra, G A, Geng, W, Gerbaudo, D, Gershtein, Y, Ginther, G, Golovanov, G, Goussiou, A, Greder, S, Grohsjean, A, Grunendahl, S, Haley, J, Han, L, Harder, K, Hauptman, J M, Hays, J, Head, T, Hedin, D, Hubacek, Z, Illingworth, R, Jabeen, S, Johns, K, Juste, A, Karmanov, D, Katsanos, I, Kermiche, S, Kozelov, A V, Kulikov, S, Kumar, A, Lammers, S, Landsberg, G, L Li, Lubatti, H J, Lyon, A L, Malyshev, V L, Maravin, Y, Menezes, D, Mercadante, P G, Mulhearn, M, Narain, M, Nayyar, R, Neal, H A, Osta, J, Parihar, V, Perfilov, M, Prokopenko, N, Qian, J, Ranjan, K, Renkel, P, Ripp-Baudot, I, Rubinov, P, Salcido, P, Sanghi, B, Savage, G, Sawyer, L, Schamberger, R D, Shabalina, E, Smith, K J, Stolin, V, Stutte, L, Takahashi, M, Tschann-Grimm, K, Tuchming, B, Uvarov, S, R Van Kooten, Verdier, P, Vertogradov, L S, Verzocchi, M, Wahl, H D, Warchol, J, Watts, G, Welty-Rieger, L, Wilson, G W, Yatsunenko, Y A, Yin, H
• Format: Article
• Language: English
• Subjects: Leptons; Luminosity; Neutrinos; Pair production; Quarks; Supersymmetry
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1202.1978

We present a search for the pair production of scalar top quarks (\(\tilde{t}_{1}\)), the lightest supersymmetric partners of the top quarks, in \(p\bar{p}\) collisions at a center-of-mass energy of 1.96 TeV, using data corresponding to an integrated luminosity of {7.3 \(fb^{-1}\)} collected with the \dzero experiment at the Fermilab Tevatron Collider. Each scalar top quark is assumed to decay into a \(b\) quark, a charged lepton, and a scalar neutrino (\(\tilde{\nu}\)). We investigate final states arising from \(\tilde{t}_{1} \bar{\tilde{t}_{1}} \rightarrow b\bar{b}\mu\tau \tilde{\nu} \tilde{\nu}\) and \(\tilde{t}_{1} \bar{\tilde{t}_{1}} \rightarrow b\bar{b}\tau\tau \tilde{\nu} \tilde{\nu}\). With no significant excess of events observed above the background expected from the standard model, we set exclusion limits on this production process in the (\(m_{\tilde{t}_{1}}\),\(m_{\tilde{\nu}}\)) plane.