| Начало > CMS Collection > CMS Preprints > Measurement of Cross Section of $pp \rightarrow t\bar{t}+\gamma $ Process in Lepton+Jets Events at $\sqrt{s}=13$ TeV in LHC Run 2 |
| Article | |
| Title | Measurement of Cross Section of $pp \rightarrow t\bar{t}+\gamma $ Process in Lepton+Jets Events at $\sqrt{s}=13$ TeV in LHC Run 2 |
| Author(s) | Das, A K (NISER, Jatni ; HBNI, Mumbai) ; Mal, P K (NISER, Jatni ; HBNI, Mumbai) ; Noonan, D (Florida Inst. Tech.) ; Yumiceva, F (Florida Inst. Tech.) ; Poudyal, N (Wayne State U., Detroit) ; Harr, R (Wayne State U., Detroit) ; Lechner, L (Vienna, OAW) ; Schoefbeck, R (Vienna, OAW) |
| Collaboration | CMS Collaboration |
| Publication | 2022 |
| Number of pages | 5 |
| In: | Springer Proc. Phys. 277 (2022) 21-25 |
| In: | 24th DAE-BRNS High Energy Physics Symposium, Jatni, India, 14 - 18 Dec 2020, pp.21-25 |
| DOI | 10.1007/978-981-19-2354-8_4 |
| Subject category | Particle Physics - Experiment |
| Accelerator/Facility, Experiment | CERN LHC ; CMS |
| Abstract | Top quark is the heaviest known elementary particle and plays a special role in the dynamics of fundamental interactions. At the LHC the top quarks are predominantly produced through strong interactions. Here, photons can originate in the final state considering initial state and final state radiations and thus involve an additional electroweak vertex [1]. Therefore, studying the top-antitop pair ($t\bar{t}$) production in association with a photon can lead to a thorough scrutiny of the Standard Model (SM) predictions. Any deviation in the measured cross section of this process can lead to beyond standard model (BSM) physics. The results presented here are performed in events containing an well isolated, high $p_{T}$ lepton (electron and muon), at least four jets from the hadronization of quarks and an isolated photon. The analysis makes use of simultaneous likelihood fits in several control regions to distinguish $t\bar{t}+ \gamma $ signal from background. |
| Copyright/License | publication: © 2022-2024 The Author(s) |