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 $$\sqrt{s}=13\,\text {Te}\hspace{-.08em}\text {V} $$ s = 13 Te V
Abstract 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 13 $$\,\text {Te}\hspace{-.08em}\text {V}...
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2025-03-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-024-13729-y |
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| author | CMS Collaboration |
| author_facet | CMS Collaboration |
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| description | Abstract A search is presented for the pair production of new heavy resonances, each decaying into a top quark (t) or antiquark and a gluon (g). The analysis uses data recorded with the CMS detector from proton–proton collisions at a center-of-mass energy of 13 $$\,\text {Te}\hspace{-.08em}\text {V}$$ Te V at the LHC, corresponding to an integrated luminosity of 138 $$\,\text {fb}^{-1}$$ fb - 1 . Events with one muon or electron, multiple jets, and missing transverse momentum are selected. After using a deep neural network to enrich the data sample with signal-like events, distributions in the scalar sum of the transverse momenta of all reconstructed objects are analyzed in the search for a signal. No significant deviations from the standard model prediction are found. Upper limits at 95% confidence level are set on the product of cross section and branching fraction squared for the pair production of excited top quarks in the $$\text {t}^{*} \rightarrow {\text {t}} {\text {g}} $$ t ∗ → tg decay channel. The upper limits range from 120 to 0.8 $$\,\text {fb}$$ fb for a $$\text {t}^{*} $$ t ∗ with spin-1/2 and from 15 to 1.0 $$\,\text {fb}$$ fb for a $$\text {t}^{*} $$ t ∗ with spin-3/2. These correspond to mass exclusion limits up to 1050 and 1700 $$\,\text {Ge}\hspace{-.08em}\text {V}$$ Ge V for spin-1/2 and spin-3/2 $$\text {t}^{*} $$ t ∗ particles, respectively. These are the most stringent limits to date on the existence of $$\text {t}^{*} \rightarrow {\text {t}} {\text {g}} $$ t ∗ → tg resonances. |
| format | Article |
| id | doaj-art-72a651fa41444cb4b18b6a35bbdd25e5 |
| institution | Kabale University |
| issn | 1434-6052 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | SpringerOpen |
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| series | European Physical Journal C: Particles and Fields |
| spelling | doaj-art-72a651fa41444cb4b18b6a35bbdd25e52025-08-20T03:53:32ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522025-03-0185312910.1140/epjc/s10052-024-13729-ySearch for pair production of heavy particles decaying to a top quark and a gluon in the lepton+jets final state in proton–proton collisions at $$\sqrt{s}=13\,\text {Te}\hspace{-.08em}\text {V} $$ s = 13 Te VCMS Collaboration0CERNAbstract A search is presented for the pair production of new heavy resonances, each decaying into a top quark (t) or antiquark and a gluon (g). The analysis uses data recorded with the CMS detector from proton–proton collisions at a center-of-mass energy of 13 $$\,\text {Te}\hspace{-.08em}\text {V}$$ Te V at the LHC, corresponding to an integrated luminosity of 138 $$\,\text {fb}^{-1}$$ fb - 1 . Events with one muon or electron, multiple jets, and missing transverse momentum are selected. After using a deep neural network to enrich the data sample with signal-like events, distributions in the scalar sum of the transverse momenta of all reconstructed objects are analyzed in the search for a signal. No significant deviations from the standard model prediction are found. Upper limits at 95% confidence level are set on the product of cross section and branching fraction squared for the pair production of excited top quarks in the $$\text {t}^{*} \rightarrow {\text {t}} {\text {g}} $$ t ∗ → tg decay channel. The upper limits range from 120 to 0.8 $$\,\text {fb}$$ fb for a $$\text {t}^{*} $$ t ∗ with spin-1/2 and from 15 to 1.0 $$\,\text {fb}$$ fb for a $$\text {t}^{*} $$ t ∗ with spin-3/2. These correspond to mass exclusion limits up to 1050 and 1700 $$\,\text {Ge}\hspace{-.08em}\text {V}$$ Ge V for spin-1/2 and spin-3/2 $$\text {t}^{*} $$ t ∗ particles, respectively. These are the most stringent limits to date on the existence of $$\text {t}^{*} \rightarrow {\text {t}} {\text {g}} $$ t ∗ → tg resonances.https://doi.org/10.1140/epjc/s10052-024-13729-y |
| spellingShingle | CMS Collaboration Search for pair production of heavy particles decaying to a top quark and a gluon in the lepton+jets final state in proton–proton collisions at $$\sqrt{s}=13\,\text {Te}\hspace{-.08em}\text {V} $$ s = 13 Te V European Physical Journal C: Particles and Fields |
| title | Search for pair production of heavy particles decaying to a top quark and a gluon in the lepton+jets final state in proton–proton collisions at $$\sqrt{s}=13\,\text {Te}\hspace{-.08em}\text {V} $$ s = 13 Te V |
| title_full | Search for pair production of heavy particles decaying to a top quark and a gluon in the lepton+jets final state in proton–proton collisions at $$\sqrt{s}=13\,\text {Te}\hspace{-.08em}\text {V} $$ s = 13 Te V |
| title_fullStr | Search for pair production of heavy particles decaying to a top quark and a gluon in the lepton+jets final state in proton–proton collisions at $$\sqrt{s}=13\,\text {Te}\hspace{-.08em}\text {V} $$ s = 13 Te V |
| title_full_unstemmed | Search for pair production of heavy particles decaying to a top quark and a gluon in the lepton+jets final state in proton–proton collisions at $$\sqrt{s}=13\,\text {Te}\hspace{-.08em}\text {V} $$ s = 13 Te V |
| title_short | Search for pair production of heavy particles decaying to a top quark and a gluon in the lepton+jets final state in proton–proton collisions at $$\sqrt{s}=13\,\text {Te}\hspace{-.08em}\text {V} $$ s = 13 Te V |
| title_sort | 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 sqrt s 13 text te hspace 08em text v s 13 te v |
| url | https://doi.org/10.1140/epjc/s10052-024-13729-y |
| work_keys_str_mv | AT cmscollaboration searchforpairproductionofheavyparticlesdecayingtoatopquarkandagluonintheleptonjetsfinalstateinprotonprotoncollisionsatsqrts13texttehspace08emtextvs13tev |