Search for new resonances in mass distributions of jet pairs using 139 fb−1 of pp collisions at $$ \sqrt{\mathrm{s}} $$ = 13 TeV with the ATLAS detector



Aad, G, Abbott, B, Abbott, DC, Abed Abud, A ORCID: 0000-0002-2788-3822, Abeling, K, Abhayasinghe, DK, Abidi, SH, AbouZeid, OS, Abraham, NL, Abramowicz, H
et al (show 2939 more authors) (2020) Search for new resonances in mass distributions of jet pairs using 139 fb−1 of pp collisions at $$ \sqrt{\mathrm{s}} $$ = 13 TeV with the ATLAS detector. Journal of High Energy Physics, 2020 (3).

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Abstract

<jats:title>A<jats:sc>bstract</jats:sc> </jats:title><jats:p>A search for new resonances decaying into a pair of jets is reported using the dataset of proton-proton collisions recorded at <jats:inline-formula><jats:alternatives><jats:tex-math>$$ \sqrt{s} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> </mml:math></jats:alternatives></jats:inline-formula> = 13 TeV with the ATLAS detector at the Large Hadron Collider between 2015 and 2018, corresponding to an integrated luminosity of 139 fb<jats:sup><jats:italic>−</jats:italic>1</jats:sup>. The distribution of the invariant mass of the two leading jets is examined for local excesses above a data-derived estimate of the Standard Model background. In addition to an inclusive dijet search, events with jets identified as containing <jats:italic>b</jats:italic>-hadrons are examined specifically. No significant excess of events above the smoothly falling background spectra is observed. The results are used to set cross-section upper limits at 95% confidence level on a range of new physics scenarios. Model-independent limits on Gaussian-shaped signals are also reported. The analysis looking at jets containing <jats:italic>b</jats:italic>-hadrons benefits from improvements in the jet flavour identification at high transverse momentum, which increases its sensitivity relative to the previous analysis beyond that expected from the higher integrated luminosity.</jats:p>

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 24 Apr 2020 13:20
Last Modified: 18 Jan 2023 23:54
DOI: 10.1007/jhep03(2020)145
Open Access URL: https://doi.org/10.1007/JHEP03(2020)145
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3083985