A search for long-lived particles (LLPs) using Formula Presented of Formula Presented collision data with Formula Presented recorded by the ATLAS experiment at the LHC is presented. The search targets LLPs with masses between 5 and 55 GeV that decay hadronically in the ATLAS inner detector. Benchmark models with LLP pair production from exotic decays of the Higgs boson and models featuring long-lived axionlike particles (ALPs) are considered. No significant excess above the expected background is observed. Upper limits are placed on the branching ratio of the Higgs boson to pairs of LLPs, the cross section for ALPs produced in association with a vector boson, and, for the first time, on the branching ratio of the top quark to an ALP and a Formula Presented quark.

Search for light long-lived particles in pp collisions at p = 13 TeV using displaced vertices in the ATLAS inner detector / Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, S., Abeling, K., Abicht, N. j., Abidi, S. h., Aboelela, M., Aboulhorma, A., Abramowicz, H., Abreu, H., Abulaiti, Y., Acharya, B. s., Ackermann, A., Adam Bourdarios, C., Adamczyk, L., Addepalli, S. v., Addison, M. j., Adelman, J., Adiguzel, A., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 133:16(2024), pp. 1-24. [10.1103/physrevlett.133.161803]

Search for light long-lived particles in pp collisions at p = 13 TeV using displaced vertices in the ATLAS inner detector

Gustavino, G.
Formal Analysis
;
2024

Abstract

A search for long-lived particles (LLPs) using Formula Presented of Formula Presented collision data with Formula Presented recorded by the ATLAS experiment at the LHC is presented. The search targets LLPs with masses between 5 and 55 GeV that decay hadronically in the ATLAS inner detector. Benchmark models with LLP pair production from exotic decays of the Higgs boson and models featuring long-lived axionlike particles (ALPs) are considered. No significant excess above the expected background is observed. Upper limits are placed on the branching ratio of the Higgs boson to pairs of LLPs, the cross section for ALPs produced in association with a vector boson, and, for the first time, on the branching ratio of the top quark to an ALP and a Formula Presented quark.
2024
long-lived particles; displaced vertices; displaced tracks; BSM; ATLAS
01 Pubblicazione su rivista::01a Articolo in rivista
Search for light long-lived particles in pp collisions at p = 13 TeV using displaced vertices in the ATLAS inner detector / Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, S., Abeling, K., Abicht, N. j., Abidi, S. h., Aboelela, M., Aboulhorma, A., Abramowicz, H., Abreu, H., Abulaiti, Y., Acharya, B. s., Ackermann, A., Adam Bourdarios, C., Adamczyk, L., Addepalli, S. v., Addison, M. j., Adelman, J., Adiguzel, A., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 133:16(2024), pp. 1-24. [10.1103/physrevlett.133.161803]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1750429
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