Observation of tW production in the single-lepton channel in pp collisions at s = 13 TeV

• Published in: The journal of high energy physics 2021-11, Vol.2021 (11)
• Main Authors: Krammer, N., Pitters, F. M., Schieck, J., Templ, S., Darwish, M. R., Lee, K., Makarenko, I., Torres Da Silva De Araujo, F., Yi, K., Liao, H., Cabrera, A., Godinovic, N., Razis, P. A., Abdelalim, A. A., Bhowmik, S., Kim, M. S., Lindén, T., Diab, B., Fay, J., Torterotot, L., Mocellin, G., Pook, T., Geiser, A., Kaveh, H., Schwanenberger, C., Garbers, C., Rieger, O., Steinbrück, G., Neukum, M., Simonis, H. J., Bahinipati, S., Etesami, S. M., Pompili, A., Abbiendi, G., Siroli, G. P., Civinini, C., Pedrini, D., Redaelli, N., Valsecchi, D., Rossi, B., Carlin, R., Tosi, M., Zumerle, G., Cho, S., Jeon, S., Oh, M., Kim, J. H., Tamulaitis, G., Araujo, M., Kirsanov, M., Sobol, A., Troshin, S., Cepeda, M., Perez Dengra, C., Martinez Rivero, C., Kailasapathy, B., Sonnadara, D. U. J., Daci, N., Dobson, M., Kratochwil, N., Marini, A. C., Perez, E., Sakulin, H., Selvaggi, M., Srimanobhas, N., Hos, I., Scott, E., Hatakeyama, K., Sawant, S., Krutelyov, V., Mei, H., Andrews, M. B., Heller, R., Kwok, K. H. M., Reinsvold Hall, A., Sexton-Kennedy, E., Kim, M., Menendez, N., Rosenzweig, D., Sturdy, J., Butalla, S., Baldenegro Barrera, C., Wang, Q., Ivanov, A., Mitchell, T., Eysermans, J., Mironov, C., Shi, Z., Chatterjee, R. M., Bandyopadhyay, H., Barberis, E., Siddireddy, P., Das, S., Dildick, S., Fallon, C., Heindl, M., Mueller, R., Damgov, J., Sheldon, P., Tannenwald, B.
• Format: Article
• Language: English
• Subjects: Classical and Quantum Gravitation; Cross-sections; Decision trees; Elementary Particles; High energy physics; Jets; Large Hadron Collider; Leptons; Luminosity; Muons; Particle collisions; Physics; Physics and Astronomy; Protons; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Quarks; Regular Article - Experimental Physics; Relativity Theory; Solenoids; Standard model (particle physics); String Theory
• ISSN: 1029-8479
• DOI: 10.1007/JHEP11(2021)111

A bstract A measurement of the cross section of the associated production of a single top quark and a W boson in final states with a muon or electron and jets in proton-proton collisions at s = 13 TeV is presented. The data correspond to an integrated luminosity of 36 fb − 1 collected with the CMS detector at the CERN LHC in 2016. A boosted decision tree is used to separate the tW signal from the dominant t t ¯ background, whilst the subleading W+jets and multijet backgrounds are constrained using data-based estimates. This result is the first observation of the tW process in final states containing a muon or electron and jets, with a significance exceeding 5 standard deviations. The cross section is determined to be 89 ± 4 (stat) ± 12 (syst) pb, consistent with the standard model.