The first evidence for the Higgs boson decay to a Z boson and a photon is presented, with a statistical significance of 3.4 standard deviations. The result is derived from a combined analysis of the searches performed by the ATLAS and CMS Collaborations with proton -proton collision datasets collected at the CERN Large Hadron Collider (LHC) from 2015 to 2018. These correspond to integrated luminosities of around 140 fb-1 for each experiment, at a center -of -mass energy of 13 TeV. The measured signal yield is 2.2 +/- 0.7 times the standard model prediction, and agrees with the theoretical expectation within 1.9 standard deviations.

Evidence for the Higgs boson decay to a Z boson and a photon at the LHC / Aad, G., Abbott, B., Abeling, K., Abicht, N. J., Abidi, S. H., Aboulhorma, A., Abramowicz, H., Abreu, H., Abulaiti, Y., Acharya, B. S., Adam Bourdarios, C., Adamczyk, L., Adamek, L., Addepalli, S. V., Addison, M. J., Adelman, J., Adiguzel, A., Adye, T., Affolder, A. A., Afik, Y., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 132:2(2024), pp. 1-32. [10.1103/physrevlett.132.021803]

Evidence for the Higgs boson decay to a Z boson and a photon at the LHC

Cunqueiro Mendez, L.;Del Re, D.;Mijuskovic, J.;Organtini, G.;Paramatti, R.;Quaranta, C.;Rahatlou, S.;Santanastasio, F.;
2024

Abstract

The first evidence for the Higgs boson decay to a Z boson and a photon is presented, with a statistical significance of 3.4 standard deviations. The result is derived from a combined analysis of the searches performed by the ATLAS and CMS Collaborations with proton -proton collision datasets collected at the CERN Large Hadron Collider (LHC) from 2015 to 2018. These correspond to integrated luminosities of around 140 fb-1 for each experiment, at a center -of -mass energy of 13 TeV. The measured signal yield is 2.2 +/- 0.7 times the standard model prediction, and agrees with the theoretical expectation within 1.9 standard deviations.
2024
Higgs boson; z gamma; evidence; CMS
01 Pubblicazione su rivista::01a Articolo in rivista
Evidence for the Higgs boson decay to a Z boson and a photon at the LHC / Aad, G., Abbott, B., Abeling, K., Abicht, N. J., Abidi, S. H., Aboulhorma, A., Abramowicz, H., Abreu, H., Abulaiti, Y., Acharya, B. S., Adam Bourdarios, C., Adamczyk, L., Adamek, L., Addepalli, S. V., Addison, M. J., Adelman, J., Adiguzel, A., Adye, T., Affolder, A. A., Afik, Y., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 132:2(2024), pp. 1-32. [10.1103/physrevlett.132.021803]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1720107
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