A search for the pair production of heavy spin-1/2 or spin-3/2 resonances (t*) in proton-proton collisions at root s = 13 TeV is presented. Data collected with the CMS detector at the CERN LHC from 2016 to 2018 corresponding to an integrated luminosity of 138 fb(-1) are used. The analysis targets benchmark signal scenarios where one t* decays into a top quark (t) and a photon (gamma), and the other into a t quark and a gluon (g), i.e., pp -> t*(t*) over bar -> tt gamma g. All-hadronic final states from the t pair decay chain are selected using jet substructure techniques. The signal is probed as a function of the t* candidate mass, which is reconstructed using the photon and a top quark candidate jet. No significant deviation from the background-only hypothesis is found. Observed (expected) upper limits on the signal cross section at 95% confidence level are set, excluding masses of spin-1/2 t* particles below 930 (930) GeV and spin-3/2 t* particles below 1330 (1390) GeV. This analysis marks the first search for heavy resonances in the t (t) over bar gamma g channel. Exploiting the high-energy photon to reduce the backgrounds, this search achieves sensitivity competitive with p -> t*(t*) over bar -> t (t) over bar gg searches for spin-1/2 t* despite the small expected t* -> t gamma branching fraction.

Search for pair production of heavy resonances in final states with a photon and large-radius jets 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. - 113:11(2026), pp. 1-25. [10.1103/bwqs-vgqn]

Search for pair production of heavy resonances in final states with a photon and large-radius jets in proton-proton collisions at Ѵs = 13 TeV

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

Abstract

A search for the pair production of heavy spin-1/2 or spin-3/2 resonances (t*) in proton-proton collisions at root s = 13 TeV is presented. Data collected with the CMS detector at the CERN LHC from 2016 to 2018 corresponding to an integrated luminosity of 138 fb(-1) are used. The analysis targets benchmark signal scenarios where one t* decays into a top quark (t) and a photon (gamma), and the other into a t quark and a gluon (g), i.e., pp -> t*(t*) over bar -> tt gamma g. All-hadronic final states from the t pair decay chain are selected using jet substructure techniques. The signal is probed as a function of the t* candidate mass, which is reconstructed using the photon and a top quark candidate jet. No significant deviation from the background-only hypothesis is found. Observed (expected) upper limits on the signal cross section at 95% confidence level are set, excluding masses of spin-1/2 t* particles below 930 (930) GeV and spin-3/2 t* particles below 1330 (1390) GeV. This analysis marks the first search for heavy resonances in the t (t) over bar gamma g channel. Exploiting the high-energy photon to reduce the backgrounds, this search achieves sensitivity competitive with p -> t*(t*) over bar -> t (t) over bar gg searches for spin-1/2 t* despite the small expected t* -> t gamma branching fraction.
2026
pair-production; heavy-resonance; CMS
01 Pubblicazione su rivista::01a Articolo in rivista
Search for pair production of heavy resonances in final states with a photon and large-radius jets 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. - 113:11(2026), pp. 1-25. [10.1103/bwqs-vgqn]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1773796
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