A search is presented for new particles produced at the LHC in proton-proton collisions at s = 13 TeV, using events with energetic jets and large missing transverse momentum. The analysis is based on a data sample corresponding to an integrated luminosity of 101 fb−1, collected in 2017–2018 with the CMS detector. Machine learning techniques are used to define separate categories for events with narrow jets from initial-state radiation and events with large-radius jets consistent with a hadronic decay of a W or Z boson. A statistical combination is made with an earlier search based on a data sample of 36 fb−1, collected in 2016. No significant excess of events is observed with respect to the standard model background expectation determined from control samples in data. The results are interpreted in terms of limits on the branching fraction of an invisible decay of the Higgs boson, as well as constraints on simplified models of dark matter, on first-generation scalar leptoquarks decaying to quarks and neutrinos, and on models with large extra dimensions. Several of the new limits, specifically for spin-1 dark matter mediators, pseudoscalar mediators, colored mediators, and leptoquarks, are the most restrictive to date. [Figure not available: see fulltext.]

Search for new particles in events with energetic jets and large missing transverse momentum in proton-proton collisions at sqrt(s) = 13 TeV / Tumasyan, A., Adam, W., Andrejkovic, J.W., Bergauer, T., Chatterjee, S., Dragicevic, M., Escalante Del Valle, A., Fruhwirth, R., Jeitler, M., Krammer, N., Lechner, L., Liko, D., Mikulec, I., Paulitsch, P., Pitters, F.M., Schieck, J., Schofbeck, R., Schwarz, D., Templ, S., Waltenberger, W., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2021:11(2021). [10.1007/JHEP11(2021)153]

Search for new particles in events with energetic jets and large missing transverse momentum in proton-proton collisions at sqrt(s) = 13 TeV

Campana M.;Del Re D.;Longo E.;Organtini G.;Paramatti R.;Quaranta C.;Rahatlou S.;Santanastasio F.;Tramontano R.;
2021

Abstract

A search is presented for new particles produced at the LHC in proton-proton collisions at s = 13 TeV, using events with energetic jets and large missing transverse momentum. The analysis is based on a data sample corresponding to an integrated luminosity of 101 fb−1, collected in 2017–2018 with the CMS detector. Machine learning techniques are used to define separate categories for events with narrow jets from initial-state radiation and events with large-radius jets consistent with a hadronic decay of a W or Z boson. A statistical combination is made with an earlier search based on a data sample of 36 fb−1, collected in 2016. No significant excess of events is observed with respect to the standard model background expectation determined from control samples in data. The results are interpreted in terms of limits on the branching fraction of an invisible decay of the Higgs boson, as well as constraints on simplified models of dark matter, on first-generation scalar leptoquarks decaying to quarks and neutrinos, and on models with large extra dimensions. Several of the new limits, specifically for spin-1 dark matter mediators, pseudoscalar mediators, colored mediators, and leptoquarks, are the most restrictive to date. [Figure not available: see fulltext.]
2021
Beyond Standard Model; Dark matter; Hadron-Hadron scattering (experiments); Higgs physics
01 Pubblicazione su rivista::01a Articolo in rivista
Search for new particles in events with energetic jets and large missing transverse momentum in proton-proton collisions at sqrt(s) = 13 TeV / Tumasyan, A., Adam, W., Andrejkovic, J.W., Bergauer, T., Chatterjee, S., Dragicevic, M., Escalante Del Valle, A., Fruhwirth, R., Jeitler, M., Krammer, N., Lechner, L., Liko, D., Mikulec, I., Paulitsch, P., Pitters, F.M., Schieck, J., Schofbeck, R., Schwarz, D., Templ, S., Waltenberger, W., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2021:11(2021). [10.1007/JHEP11(2021)153]
File allegati a questo prodotto
File Dimensione Formato  
The CMS collaboration_Search for new particles_2021.pdf

accesso aperto

Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Creative commons
Dimensione 1.99 MB
Formato Adobe PDF
1.99 MB Adobe PDF

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/11573/1624965
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 124
  • ???jsp.display-item.citation.isi??? 117
social impact