Search for pair production of heavy resonances in final states with a photon and large-radius jets in proton-proton collisions at; ; ; ; ; s; ; ; =; 13;  ;  ; TeV; ; Journal Article uri icon

Overview

abstract

  • ; A search for the pair production of heavy spin-; ; 1; /; 2; ; or spin-; ; 3; /; 2; ; resonances (; ; ; t; *; ; ; ) in proton-proton collisions at; ; ; 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 (; ; γ; ; ), and the other into a; ; t; ; quark and a gluon (; ; g; ; ), i.e.,; ; ; p; p; →; ; ; t; ; ; *; ; ; ; ; ; ; t; ; ; *; ; ; ; ; ¯; ; ; →; t; t; γ; 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; ; ; ¯; ; ; ; γ; g; ; ; channel. Exploiting the high-energy photon to reduce the backgrounds, this search achieves sensitivity competitive with; ; ; p; p; →; ; ; t; ; ; *; ; ; ; ; ; ; t; ; ; *; ; ; ; ; ¯; ; ; →; ; t; ; ; t; ; ; ¯; ; ; ; g; g; ; ; searches for spin-; ; 1; /; 2; ; ; ; t; *; ; ; despite the small expected; ; ; t; *; ; →; t; γ; ; branching fraction.;

publication date

  • June 9, 2026

Date in CU Experts

  • June 10, 2026 2:08 AM

Full Author List

  • Hayrapetyan A; Makarenko V; Tumasyan A; Adam W; Andrejkovic JW; Benato L; Bergauer T; Dragicevic M; Giordano C; Hussain PS

author count

  • 2421

Other Profiles

International Standard Serial Number (ISSN)

  • 2470-0010

Electronic International Standard Serial Number (EISSN)

  • 2470-0029

Additional Document Info

volume

  • 113

issue

  • 11

number

  • 112005