The existence of a new spin-zero particle with a mass below the electroweak scale is predicted by several theoretical models. Searches for resonant production of photon pairs at the LHC are able to probe these models. We present a search for a narrow resonance produced through gluon fusion that decays into a pair of photons with an invariant mass between 10 and 70 GeV, using a proton-proton collision dataset from the CMS experiment. This dataset, corresponding to an integrated luminosity of 54.4  fb−1, was recorded in 2018 at a center-of-mass energy of 13 TeV using a newly introduced diphoton trigger that enabled exploration of the low-mass diphoton spectrum. No significant excess above the expected background is observed. Upper limits are set on the product of the gluon fusion production cross section and the branching fraction of the diphoton decay of a narrow resonance. An interpretation of these limits within an effective field theory framework for axionlike particles is also provided.

Search for a narrow resonance with a mass between 10 and 70 GeV decaying to a pair of photons in proton-proton collisions at Ѵs =13 TeV / Hayrapetyan, A., Makarenko, V., Tumasyan, A., Adam, W., Andrejkovic, J. w., Benato, L., Bergauer, T., Dragicevic, M., Giordano, C., Hussain, P. s., Jeitler, M., Krammer, N., Li, A., Liko, D., Matthewman, M., Mikulec, I., Schieck, J., Schöfbeck, R., Schwarz, D., Shooshtari, M., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 114:3(2026), pp. 1-27. [10.1103/q2mh-7mhj]

Search for a narrow resonance with a mass between 10 and 70 GeV decaying to a pair of photons in proton-proton collisions at Ѵs =13 TeV

Cunqueiro Mendez, L.;Del Re, D.;Organtini, G.;Paramatti, R.;Rahatlou, S.;Santanastasio, F.;
2026

Abstract

The existence of a new spin-zero particle with a mass below the electroweak scale is predicted by several theoretical models. Searches for resonant production of photon pairs at the LHC are able to probe these models. We present a search for a narrow resonance produced through gluon fusion that decays into a pair of photons with an invariant mass between 10 and 70 GeV, using a proton-proton collision dataset from the CMS experiment. This dataset, corresponding to an integrated luminosity of 54.4  fb−1, was recorded in 2018 at a center-of-mass energy of 13 TeV using a newly introduced diphoton trigger that enabled exploration of the low-mass diphoton spectrum. No significant excess above the expected background is observed. Upper limits are set on the product of the gluon fusion production cross section and the branching fraction of the diphoton decay of a narrow resonance. An interpretation of these limits within an effective field theory framework for axionlike particles is also provided.
2026
CMS; narrow resonance; photons
01 Pubblicazione su rivista::01a Articolo in rivista
Search for a narrow resonance with a mass between 10 and 70 GeV decaying to a pair of photons in proton-proton collisions at Ѵs =13 TeV / Hayrapetyan, A., Makarenko, V., Tumasyan, A., Adam, W., Andrejkovic, J. w., Benato, L., Bergauer, T., Dragicevic, M., Giordano, C., Hussain, P. s., Jeitler, M., Krammer, N., Li, A., Liko, D., Matthewman, M., Mikulec, I., Schieck, J., Schöfbeck, R., Schwarz, D., Shooshtari, M., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 114:3(2026), pp. 1-27. [10.1103/q2mh-7mhj]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1773795
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