Search for new resonances in mass distributions of jet pairs using 139 fb−1 of pp collisions at √ s = 13 TeV with the ATLAS detector

Search for new resonances in mass distributions of jet pairs using 139 fb−1 of pp collisions at √ s = 13 TeV with the ATLAS detector

A search for new resonances decaying into a pair of jets is reported using the dataset of proton-proton collisions recorded at 𝑠√ = 13 TeV with the ATLAS detector at the Large Hadron Collider between 2015 and 2018, corresponding to an integrated luminosity of 139 fb−1. The distribution of the invari...

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Hlavní autoři: Frost, JA, Aad, G, Abbott, B, Abbott, DC, Ambroz, L, Artoni, G, Backes, M, Balunas, WK, Barr, AJ, Beresford, L, Bortoletto, D, Cooper-Sarkar, AM, Foti, MG, Gallardo, GE, Gallas, EJ, Gwenlan, C, Hays, CP, Huffman, TB, Karava, K, Liu, JKK, Marchese, L, Nagai, K, Nickerson, RB, Norjoharuddeen, N, O’neill, AP, Paredes Saenz, SR, Petrov, M, Schopf, E, Sharma, A, Shipsey, IPJ, Stanislaus, B, Stankaityte, M, Tosciri, C, Tseng, JC-L, Viehhauser, GHA, Weidberg, AR, Windischhofer, PJ, Wölker, RW, Zemaityte, G, Zgubič, M
Médium: Journal article
Jazyk:English
Vydáno: Springer 2020
Popis
Shrnutí:A search for new resonances decaying into a pair of jets is reported using the dataset of proton-proton collisions recorded at 𝑠√ = 13 TeV with the ATLAS detector at the Large Hadron Collider between 2015 and 2018, corresponding to an integrated luminosity of 139 fb−1. 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 b-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 b-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.

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