TY - JOUR
T1 - Search for pair production of heavy particles decaying to a top quark and a gluon in the lepton+jets final state in proton–proton collisions at √s=13TeV
AU - CMS Collaboration
AU - Druzhkin, D.
AU - Borshch, V.
AU - Babaev, A.
AU - Uzunian, A.
AU - Slabospitskii, S.
AU - Konstantinov, D.
AU - Kachanov, V.
AU - Skovpen, Y.
AU - Radchenko, O.
AU - Kozyrev, A.
AU - Dimova, T.
AU - Blinov, V.
AU - Vorotnikov, G.
AU - Volkov, P.
AU - Savrin, V.
AU - Petrushanko, S.
AU - Perfilov, M.
AU - Obraztsov, S.
AU - Kodolova, O.
AU - Klyukhin, V.
AU - Dudko, L.
AU - Dubinin, M.
AU - Bunichev, V.
AU - Boos, E.
AU - Terkulov, A.
AU - Kirakosyan, M.
AU - Azarkin, M.
AU - Andreev, V.
AU - Polikarpov, S.
AU - Danilov, M.
AU - Chistov, R.
AU - Zhokin, A.
AU - Popov, V.
AU - Nikitenko, A.
AU - Lychkovskaya, N.
AU - Gavrilov, V.
AU - Ivanov, K.
AU - Aushev, T.
AU - Toropin, A.
AU - Zghiche, A.
AU - Zabi, A.
AU - Salerno, R.
AU - Ochando, C.
AU - Nguyen, M.
AU - de Cassagnac, R. Granier
AU - De Wit, A.
AU - Davignon, O.
AU - Cappati, A.
AU - Boldrini, G.
AU - Beaudette, F.
N1 - Publisher Copyright:
© CERN for the benefit of the CMS Collaboration 2025.
PY - 2025/3/1
Y1 - 2025/3/1
N2 - A search is presented for the pair production of new heavy resonances, each decaying into a top quark (t) or antiquark and a gluon (g). The analysis uses data recorded with the CMS detector from proton–proton collisions at a center-of-mass energy of 13TeV at the LHC, corresponding to an integrated luminosity of 138fb-1. Events with one muon or electron, multiple jets, and missing transverse momentum are selected. After using a deep neural network to enrich the data sample with signal-like events, distributions in the scalar sum of the transverse momenta of all reconstructed objects are analyzed in the search for a signal. No significant deviations from the standard model prediction are found. Upper limits at 95% confidence level are set on the product of cross section and branching fraction squared for the pair production of excited top quarks in the t∗→tg decay channel. The upper limits range from 120 to 0.8fb for a t∗with spin-1/2 and from 15 to 1.0fb for a t∗with spin-3/2. These correspond to mass exclusion limits up to 1050 and 1700GeV for spin-1/2 and spin-3/2 t∗particles, respectively. These are the most stringent limits to date on the existence of t∗→tg resonances.
AB - A search is presented for the pair production of new heavy resonances, each decaying into a top quark (t) or antiquark and a gluon (g). The analysis uses data recorded with the CMS detector from proton–proton collisions at a center-of-mass energy of 13TeV at the LHC, corresponding to an integrated luminosity of 138fb-1. Events with one muon or electron, multiple jets, and missing transverse momentum are selected. After using a deep neural network to enrich the data sample with signal-like events, distributions in the scalar sum of the transverse momenta of all reconstructed objects are analyzed in the search for a signal. No significant deviations from the standard model prediction are found. Upper limits at 95% confidence level are set on the product of cross section and branching fraction squared for the pair production of excited top quarks in the t∗→tg decay channel. The upper limits range from 120 to 0.8fb for a t∗with spin-1/2 and from 15 to 1.0fb for a t∗with spin-3/2. These correspond to mass exclusion limits up to 1050 and 1700GeV for spin-1/2 and spin-3/2 t∗particles, respectively. These are the most stringent limits to date on the existence of t∗→tg resonances.
UR - https://www.scopus.com/pages/publications/105012849726
U2 - 10.1140/epjc/s10052-024-13729-y
DO - 10.1140/epjc/s10052-024-13729-y
M3 - Article
AN - SCOPUS:105012849726
SN - 1434-6044
VL - 85
JO - European Physical Journal C
JF - European Physical Journal C
IS - 3
M1 - 342
ER -