Measurements of tt¯ cross sections in association with b jets and inclusive jets and their ratio using dilepton final states in pp collisions at s=13TeV

Measurements of tt¯ cross sections in association with b jets and inclusive jets and their ratio using dilepton final states in pp collisions at s=13TeV

The cross sections for the production of tt¯bb¯ and tt¯jj events and their ratio σtt¯bb¯/σtt¯jj are measured using data corresponding to an integrated luminosity of 2.3 fb−1collected in pp collisions at s=13 TeV with the CMS detector at the LHC. Events with two leptons (e or μ) and at least four rec...

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Veröffentlicht in:Physics letters. B 2018-01, Vol.776 (C), p.355-378
Hauptverfasser: Asilar, E., Fagot, A., Gul, M., Delcourt, M., Moraes, A., Fonseca De Souza, S., Mundim, L., Vilela Pereira, A., Antunovic, Z., Mousa, J., Dejardin, M., Baffioni, S., Nguyen, M., Fontaine, J.-C., Radziej, M., Lelek, A., Melzer-Pellmann, I.-A., Raspereza, A., Kurz, S., Schumann, S., Haitz, D., Pant, L.M., Mahakud, B., Mohanty, G.B., Banerjee, S., Rezaei Hosseinabadi, F., Grunewald, M., Silvestris, L., Tuve, C., Lenzi, P., Russo, L., Dinardo, M.E., Fiorendi, S., Manzoni, R.A., Montecassiano, F., Zumerle, G., Margaroli, F., Sola, V., Yang, U.K., Yusli, M.N., Shah, M.A., Oreshkin, V., Toropin, A., Obraztsov, S., Volkov, A., Cirkovic, P., Alcaraz Maestre, J., Cabrillo, I.J., De Gruttola, M., Funk, W., Knünz, V., Merlin, J.A., Perez, E., Tosi, M., Zeuner, W.D., Langenegger, U., Bachmair, F., Martinez Ruiz del Arbol, P., Lin, W., Adiguzel, A., Ozturk, S., Sunar Cerci, D., Brown, R.M., Haddad, Y., Call, K., Henderson, C., Calderon De La Barca Sanchez, M., Lander, R., Valuev, V., Ghiasi Shirazi, S.M.A., Heilman, J., Simon, S., Campagnari, C., Dutta, V., Bornheim, A., Burkett, K., Fisk, I., Liu, T., McBride, P., Nahn, S., O'Dell, V., Pedro, K., Kotov, K., Yohay, R., Yumiceva, F., Wetzel, J., Stephans, G.S.F., Bloom, K., Dev, N., Smith, G., Wayne, M., Luo, W., Hardenbrook, J., Barker, A., Garcia-Bellido, A., Thomassen, P., Rose, K., Wang, Y., Belknap, D.A., Smith, W.H.
Format: Artikel
Sprache:eng
Schlagworte:
CMS
Physics
Top quark
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Zusammenfassung:The cross sections for the production of tt¯bb¯ and tt¯jj events and their ratio σtt¯bb¯/σtt¯jj are measured using data corresponding to an integrated luminosity of 2.3 fb−1collected in pp collisions at s=13 TeV with the CMS detector at the LHC. Events with two leptons (e or μ) and at least four reconstructed jets, including at least two identified as b quark jets, in the final state are selected. In the full phase space, the measured ratio is 0.022±0.003(stat)±0.006(syst), the cross section σtt¯bb¯ is 4.0±0.6(stat)±1.3(syst) pb and σtt¯jj is 184±6(stat)±33(syst) pb. The measurements are compared with the standard model expectations obtained from a powheg simulation at next-to-leading-order interfaced with pythia.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2017.11.043