A search for long-lived particles (LLPs) using 140  fb−1 of 𝑝⁢𝑝 collision data with √𝑠=13  TeV 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 𝑢/𝑐 quark.

Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, S., Abeling, K., Abicht, N. J., et al. (2024). Search for Light Long-Lived Particles in 𝑝⁢𝑝 Collisions at √𝑠=13  TeV Using Displaced Vertices in the ATLAS Inner Detector. PHYSICAL REVIEW LETTERS, 133(16), 161803-1-161803-24 [10.1103/physrevlett.133.161803].

Search for Light Long-Lived Particles in 𝑝⁢𝑝 Collisions at √𝑠=13  TeV Using Displaced Vertices in the ATLAS Inner Detector

Alfonsi, F.;Ballabene, E.;Bianco, G.;Boscherini, D.;Bruni, A.;Carratta, G.;Corchia, F.  A.;Cremonini, D.;De Castro, S.;Fabbri, F.;Fabbri, L.;Franchini, M.;Gabrielli, A.;Giacobbe, B.;Lasagni Manghi, F.;Levrini, G.;Nechaeva, S.;Polini, A.;Rinaldi, L.;Romano, M.;Sanzani, E.;Sbarra, C.;Sbrizzi, A.;Semprini-Cesari, N.;Sioli, M.;Todome, K.;Valentinetti, S.;Villa, M.;Vittori, C.;Vivarelli, I.;Zoccoli, A.;
2024

Abstract

A search for long-lived particles (LLPs) using 140  fb−1 of 𝑝⁢𝑝 collision data with √𝑠=13  TeV 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 𝑢/𝑐 quark.
2024
Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, S., Abeling, K., Abicht, N. J., et al. (2024). Search for Light Long-Lived Particles in ��⁢�� Collisions at √��=13  TeV Using Displaced Vertices in the ATLAS Inner Detector. PHYSICAL REVIEW LETTERS, 133(16), 161803-1-161803-24 [10.1103/physrevlett.133.161803].
Aad, G.; Aakvaag, E.; Abbott, B.; Abdelhameed, S.; Abeling, K.; Abicht, N.  J.; Abidi, S.  H.; Aboelela, M.; Aboulhorma, A.; Abramowicz, H.; Abreu, H....espandi
File in questo prodotto:
File Dimensione Formato  
PhysRevLett.133.161803.pdf

accesso aperto

Tipo: Versione (PDF) editoriale / Version Of Record
Licenza: Licenza per Accesso Aperto. Creative Commons Attribuzione (CCBY)
Dimensione 1.55 MB
Formato Adobe PDF
1.55 MB Adobe PDF Visualizza/Apri
SM (2).pdf

accesso aperto

Tipo: File Supplementare
Licenza: Licenza per Accesso Aperto. Creative Commons Attribuzione (CCBY)
Dimensione 203.56 kB
Formato Adobe PDF
203.56 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1008923
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 3
  • ???jsp.display-item.citation.isi??? 1
social impact