A search for pair production of a scalar partner of the top quark in events with four or more jets plus missing transverse momentum is presented. An analysis of 36.1 fb−1of s=13 TeV proton-proton collisions collected using the ATLAS detector at the LHC yields no significant excess over the expected Standard Model background. To interpret the results a simplified supersymmetric model is used where the top squark is assumed to decay via t˜1→t(∗)χ˜10 and t˜1→bχ˜1±→bW(∗)χ˜10, where χ10(χ1±) denotes the lightest neutralino (chargino). Exclusion limits are placed in terms of the top-squark and neutralino masses. Assuming a branching ratio of 100% to tχ˜10, top-squark masses in the range 450–1000 GeV are excluded for χ˜10 masses below 160 GeV. In the case where mt˜1∼mt+mχ˜10, top-squark masses in the range 235–590 GeV are excluded.

The ATLAS collaboration, M. Aaboud, G. Aad, B. Abbott, O. Abdinov, B. Abeloos, et al. (2017). Search for a scalar partner of the top quark in the jets plus missing transverse momentum final state at â s=13 TeV with the ATLAS detector. JOURNAL OF HIGH ENERGY PHYSICS, 2017(12), 85-1-85-56 [10.1007/JHEP12(2017)085].

Search for a scalar partner of the top quark in the jets plus missing transverse momentum final state at √s=13 TeV with the ATLAS detector

G. L. Alberghi;L. Bellagamba;S. Biondi;D. Boscherini;A. Bruni;G. Bruni;G. D’amen;S. De Castro;F. Fabbri;L. Fabbri;M. Franchini;A. Gabrielli;B. Giacobbe;N. Giangiacomi;F. Lasagni Manghi;L. Massa;A. Mengarelli;A. Polini;L. Rinaldi;M. Romano;C. Sbarra;N. Semprini-Cesari;M. Sioli;R. Spighi;G. Ucchielli;S. Valentinetti;M. Villa;C. Vittori;I. Vivarelli;A. Zoccoli;
2017

Abstract

A search for pair production of a scalar partner of the top quark in events with four or more jets plus missing transverse momentum is presented. An analysis of 36.1 fb−1of s=13 TeV proton-proton collisions collected using the ATLAS detector at the LHC yields no significant excess over the expected Standard Model background. To interpret the results a simplified supersymmetric model is used where the top squark is assumed to decay via t˜1→t(∗)χ˜10 and t˜1→bχ˜1±→bW(∗)χ˜10, where χ10(χ1±) denotes the lightest neutralino (chargino). Exclusion limits are placed in terms of the top-squark and neutralino masses. Assuming a branching ratio of 100% to tχ˜10, top-squark masses in the range 450–1000 GeV are excluded for χ˜10 masses below 160 GeV. In the case where mt˜1∼mt+mχ˜10, top-squark masses in the range 235–590 GeV are excluded.
2017
The ATLAS collaboration, M. Aaboud, G. Aad, B. Abbott, O. Abdinov, B. Abeloos, et al. (2017). Search for a scalar partner of the top quark in the jets plus missing transverse momentum final state at â s=13 TeV with the ATLAS detector. JOURNAL OF HIGH ENERGY PHYSICS, 2017(12), 85-1-85-56 [10.1007/JHEP12(2017)085].
The ATLAS collaboration; M. Aaboud; G. Aad; B. Abbott; O. Abdinov; B. Abeloos; S. H. Abidi; O. S. AbouZeid; N. L. Abraham; H. Abramowicz; H. Abreu; R....espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/624297
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