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- W3121421736 abstract "Abstract A resonance peak in the invariant mass spectrum has been the main feature of a particle at collider experiments. However, broad resonances not exhibiting such a sharp peak are generically predicted in new physics models beyond the Standard Model. Without a peak, how do we discover a broad resonance at colliders? We use machine learning technique to explore answers beyond common knowledge. We learn that, by applying deep neural network to the case of a $$tbar{t}$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi>t</mml:mi><mml:mover><mml:mrow><mml:mi>t</mml:mi></mml:mrow><mml:mrow><mml:mo>¯</mml:mo></mml:mrow></mml:mover></mml:mrow></mml:math> resonance, the invariant mass $$M_{tbar{t}}$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mi>M</mml:mi><mml:mrow><mml:mi>t</mml:mi><mml:mover><mml:mrow><mml:mi>t</mml:mi></mml:mrow><mml:mrow><mml:mo>¯</mml:mo></mml:mrow></mml:mover></mml:mrow></mml:msub></mml:math> is still useful, but additional information from off-resonance region, angular correlations, $$p_T$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mi>p</mml:mi><mml:mi>T</mml:mi></mml:msub></mml:math> , and top jet mass are also significantly important. As a result, the improved LHC sensitivities do not depend strongly on the width. The results may also imply that the additional information can be used to improve narrow-resonance searches too. Further, we also detail how we assess machine-learned information." @default.
- W3121421736 created "2021-02-01" @default.
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- W3121421736 date "2020-02-01" @default.
- W3121421736 modified "2023-09-27" @default.
- W3121421736 title "Beyond $$M_{tbar{t}}$$: learning to search for a broad $$tbar{t}$$ resonance at the LHC" @default.
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- W3121421736 doi "https://doi.org/10.1140/epjc/s10052-020-7672-9" @default.
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