First measurement of the cross section for top quark pair production with additional charm jets using dileptonic final states in pp collisions at s=13TeV
Аутори
Sirunyan, A. M.Tumasyan, A.
Adam, W.
Bergauer, T.
Dragicevic, M.
Adžić, Petar
Đorđević, Miloš
Milenović, Predrag
Milošević, Jovan
Остала ауторства
CMS CollaborationЧланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
The first measurement of the inclusive cross section for top quark pairs (tt‾) produced in association with two additional charm jets is presented. The analysis uses the dileptonic final states of tt‾ events produced in proton-proton collisions at a centre-of-mass energy of 13 TeV. The data correspond to an integrated luminosity of 41.5fb−1, recorded by the CMS experiment at the LHC. A new charm jet identification algorithm provides input to a neural network that is trained to distinguish among tt‾ events with two additional charm (tt‾cc‾), bottom (tt‾bb‾), and light-flavour or gluon (tt‾LL) jets. By means of a template fitting procedure, the inclusive tt‾cc‾, tt‾bb‾, and tt‾LL cross sections are simultaneously measured, together with their ratios to the inclusive tt‾ + two jets cross section. This provides measurements of the tt‾cc‾ and tt‾bb‾ cross sections of 10.1±1.2(stat)±1.4(syst)pb and 4.54±0.35(stat)±0.56(syst)pb, respectively, in the full phase space. The results are compared ...and found to be consistent with predictions from two different matrix element generators with next-to-leading order accuracy in quantum chromodynamics, interfaced with a parton shower simulation.
Извор:
Physics Letters B, 2021, 820 C, 136565-Напомена:
- CMS Collaboration (ukupan broj autora: 2325)
DOI: 10.1016/j.physletb.2021.136565
ISSN: 0370-2693
WoS: 000713124400026
Scopus: 2-s2.0-85113665013
Колекције
Институција/група
VinčaTY - JOUR AU - Sirunyan, A. M. AU - Tumasyan, A. AU - Adam, W. AU - Bergauer, T. AU - Dragicevic, M. AU - Adžić, Petar AU - Đorđević, Miloš AU - Milenović, Predrag AU - Milošević, Jovan PY - 2021 UR - https://vinar.vin.bg.ac.rs/handle/123456789/10007 AB - The first measurement of the inclusive cross section for top quark pairs (tt‾) produced in association with two additional charm jets is presented. The analysis uses the dileptonic final states of tt‾ events produced in proton-proton collisions at a centre-of-mass energy of 13 TeV. The data correspond to an integrated luminosity of 41.5fb−1, recorded by the CMS experiment at the LHC. A new charm jet identification algorithm provides input to a neural network that is trained to distinguish among tt‾ events with two additional charm (tt‾cc‾), bottom (tt‾bb‾), and light-flavour or gluon (tt‾LL) jets. By means of a template fitting procedure, the inclusive tt‾cc‾, tt‾bb‾, and tt‾LL cross sections are simultaneously measured, together with their ratios to the inclusive tt‾ + two jets cross section. This provides measurements of the tt‾cc‾ and tt‾bb‾ cross sections of 10.1±1.2(stat)±1.4(syst)pb and 4.54±0.35(stat)±0.56(syst)pb, respectively, in the full phase space. The results are compared and found to be consistent with predictions from two different matrix element generators with next-to-leading order accuracy in quantum chromodynamics, interfaced with a parton shower simulation. T2 - Physics Letters B T1 - First measurement of the cross section for top quark pair production with additional charm jets using dileptonic final states in pp collisions at s=13TeV VL - 820 C SP - 136565 DO - 10.1016/j.physletb.2021.136565 ER -
@article{ author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Bergauer, T. and Dragicevic, M. and Adžić, Petar and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan", year = "2021", abstract = "The first measurement of the inclusive cross section for top quark pairs (tt‾) produced in association with two additional charm jets is presented. The analysis uses the dileptonic final states of tt‾ events produced in proton-proton collisions at a centre-of-mass energy of 13 TeV. The data correspond to an integrated luminosity of 41.5fb−1, recorded by the CMS experiment at the LHC. A new charm jet identification algorithm provides input to a neural network that is trained to distinguish among tt‾ events with two additional charm (tt‾cc‾), bottom (tt‾bb‾), and light-flavour or gluon (tt‾LL) jets. By means of a template fitting procedure, the inclusive tt‾cc‾, tt‾bb‾, and tt‾LL cross sections are simultaneously measured, together with their ratios to the inclusive tt‾ + two jets cross section. This provides measurements of the tt‾cc‾ and tt‾bb‾ cross sections of 10.1±1.2(stat)±1.4(syst)pb and 4.54±0.35(stat)±0.56(syst)pb, respectively, in the full phase space. The results are compared and found to be consistent with predictions from two different matrix element generators with next-to-leading order accuracy in quantum chromodynamics, interfaced with a parton shower simulation.", journal = "Physics Letters B", title = "First measurement of the cross section for top quark pair production with additional charm jets using dileptonic final states in pp collisions at s=13TeV", volume = "820 C", pages = "136565", doi = "10.1016/j.physletb.2021.136565" }
Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Adžić, P., Đorđević, M., Milenović, P.,& Milošević, J.. (2021). First measurement of the cross section for top quark pair production with additional charm jets using dileptonic final states in pp collisions at s=13TeV. in Physics Letters B, 820 C, 136565. https://doi.org/10.1016/j.physletb.2021.136565
Sirunyan AM, Tumasyan A, Adam W, Bergauer T, Dragicevic M, Adžić P, Đorđević M, Milenović P, Milošević J. First measurement of the cross section for top quark pair production with additional charm jets using dileptonic final states in pp collisions at s=13TeV. in Physics Letters B. 2021;820 C:136565. doi:10.1016/j.physletb.2021.136565 .
Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Adžić, Petar, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, "First measurement of the cross section for top quark pair production with additional charm jets using dileptonic final states in pp collisions at s=13TeV" in Physics Letters B, 820 C (2021):136565, https://doi.org/10.1016/j.physletb.2021.136565 . .