Top-antitop resonance searches beyond 1 TeV
We perform a general parton level analysis for the search of heavy resonant states in the production of tt̄ pairs at the LHC with an integrated luminosity of 30 fb-1. We assume the existence of resonances that only couple to quarks and propose kinematic cuts in order to increase the number of events...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_15507998_v87_n5_p_Alvarez |
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todo:paper_15507998_v87_n5_p_Alvarez2023-10-03T16:24:48Z Top-antitop resonance searches beyond 1 TeV Alvarez, E. Sanchez Vietto, J.I. Szynkman, A. We perform a general parton level analysis for the search of heavy resonant states in the production of tt̄ pairs at the LHC with an integrated luminosity of 30 fb-1. We assume the existence of resonances that only couple to quarks and propose kinematic cuts in order to increase the number of events produced through quark annihilation. We study the interplay between different variables and their impact on the purity of the selected sample. We focus on the longitudinal (β) and transverse (pT) momenta of the tt̄ pair and the scattering angle (θ) in the center of mass reference frame. We observe that β is replaced by θ as a suitable discriminating variable of quark-annihilation processes for invariant masses above 1 TeV. Finally, we illustrate the analysis with a gluon resonance of 1.5 TeV and show the improvement in the sensitivity of the signal when cuts on θ are imposed. © 2013 American Physical Society. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_15507998_v87_n5_p_Alvarez |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| description |
We perform a general parton level analysis for the search of heavy resonant states in the production of tt̄ pairs at the LHC with an integrated luminosity of 30 fb-1. We assume the existence of resonances that only couple to quarks and propose kinematic cuts in order to increase the number of events produced through quark annihilation. We study the interplay between different variables and their impact on the purity of the selected sample. We focus on the longitudinal (β) and transverse (pT) momenta of the tt̄ pair and the scattering angle (θ) in the center of mass reference frame. We observe that β is replaced by θ as a suitable discriminating variable of quark-annihilation processes for invariant masses above 1 TeV. Finally, we illustrate the analysis with a gluon resonance of 1.5 TeV and show the improvement in the sensitivity of the signal when cuts on θ are imposed. © 2013 American Physical Society. |
| format |
JOUR |
| author |
Alvarez, E. Sanchez Vietto, J.I. Szynkman, A. |
| spellingShingle |
Alvarez, E. Sanchez Vietto, J.I. Szynkman, A. Top-antitop resonance searches beyond 1 TeV |
| author_facet |
Alvarez, E. Sanchez Vietto, J.I. Szynkman, A. |
| author_sort |
Alvarez, E. |
| title |
Top-antitop resonance searches beyond 1 TeV |
| title_short |
Top-antitop resonance searches beyond 1 TeV |
| title_full |
Top-antitop resonance searches beyond 1 TeV |
| title_fullStr |
Top-antitop resonance searches beyond 1 TeV |
| title_full_unstemmed |
Top-antitop resonance searches beyond 1 TeV |
| title_sort |
top-antitop resonance searches beyond 1 tev |
| url |
http://hdl.handle.net/20.500.12110/paper_15507998_v87_n5_p_Alvarez |
| work_keys_str_mv |
AT alvareze topantitopresonancesearchesbeyond1tev AT sanchezviettoji topantitopresonancesearchesbeyond1tev AT szynkmana topantitopresonancesearchesbeyond1tev |
| _version_ |
1807323548294840320 |