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- W2615658112 abstract "We investigate the anomalous flavour changing neutral current (FCNC) interactions of top quark through the process <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M2><mml:msup><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mo>-</mml:mo></mml:mrow></mml:msup><mml:mi>p</mml:mi><mml:mo>→</mml:mo><mml:msup><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mo>-</mml:mo></mml:mrow></mml:msup><mml:msup><mml:mrow><mml:mi>W</mml:mi></mml:mrow><mml:mrow><mml:mo>±</mml:mo></mml:mrow></mml:msup><mml:mi>q</mml:mi><mml:mo>+</mml:mo><mml:mi>X</mml:mi></mml:math>. We calculate the signal and background cross sections in electron-proton collisions at Large Hadron electron Collider (LHeC) with a 7 TeV proton beam from the LHC and a new 60 GeV electron beam from energy recovery linac (ERL). We study the relevant background processes including one electron and three jets in the final state. The distributions of the invariant mass of two jets and an additional jet tagged as <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M3><mml:mrow><mml:mi>b</mml:mi></mml:mrow></mml:math>-jet are used to account for signal and background events after the analysis cuts. We find upper bounds on anomalous FCNC couplings <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M4><mml:mrow><mml:mi>λ</mml:mi></mml:mrow></mml:math> of the order of <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M5><mml:mn mathvariant=normal>1</mml:mn><mml:msup><mml:mrow><mml:mn mathvariant=normal>0</mml:mn></mml:mrow><mml:mrow><mml:mo>-</mml:mo><mml:mn mathvariant=normal>2</mml:mn></mml:mrow></mml:msup></mml:math> at LHeC for a luminosity projection of <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M6><mml:mrow><mml:mn mathvariant=normal>500</mml:mn></mml:mrow></mml:math> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M7><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant=normal>f</mml:mi><mml:mi mathvariant=normal>b</mml:mi></mml:mrow><mml:mrow><mml:mo>-</mml:mo><mml:mn mathvariant=normal>1</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math> together with the fast simulation of detector effects. As a matter of interest, we analyze the sensitivity to the couplings <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M8><mml:mo stretchy=false>(</mml:mo><mml:msub><mml:mrow><mml:mi>λ</mml:mi></mml:mrow><mml:mrow><mml:mi>u</mml:mi></mml:mrow></mml:msub></mml:math>, <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M9><mml:msub><mml:mrow><mml:mi>λ</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow></mml:msub><mml:mo stretchy=false>)</mml:mo></mml:math> and find an enhanced sensitivity to <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M10><mml:mrow><mml:msub><mml:mrow><mml:mi>λ</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math> at the LHeC when compared to the results from the HERA." @default.
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- W2615658112 date "2017-09-14" @default.
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- W2615658112 title "Probing the Anomalous FCNC <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M1><mml:mi>t</mml:mi><mml:mi>q</mml:mi><mml:mi>γ</mml:mi></mml:math> Couplings at Large Hadron Electron Collider" @default.
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