Journal Article

Evidence for$$\\text {W}\\text {W}$$production from double-parton interactions in proton–proton collisions at$$\\sqrt{s} = 13 \\,\\text {TeV}

Huang, T., Grünendahl, S., Tosi, N., Aldaya Martin, M., Grohsjean, A., Özçelik, Ö., Da Silva, W. L. Prado, Hasegawa, S., Kim, J. H., Kyberd, P., Regnard, S., Pook, T., Abbaneo, D., Smith, C., Savina, M., Okhotnikov, V., West, C., Heller, R., Parygin, P., Palmer, C., Mossolov, V., Avila, C., Covarelli, R., Milosevic, V., Sikdar, A. K., Lehti, S., Karancsi, J., Lykken, J., Biino, C., Garg, R. B., Stenson, K., Ligabue, F., Florez, C., Kim, H., Fouz, M. C., Lassila-Perini, K., Zhang, S., Swartz, M., Shi, W., Orfanelli, S., Oh, S. B., Contardo, D., Strait, J., Amapane, N., Lyons, L., Kyriacou, S., Lee, J. S. H., Luukka, P., Meyer, A., Aly, R., Rumerio, P., Purohit, A., Wright, J., Asavapibhop, B., Tosi, M., Galloni, C., Valuev, V., Chao, Y., Loukas, N., Kim, J., Tu, Z., De Boer, W., Toropin, A., Hohlmann, M., Ferri, F., Shulha, S., Yu, D., Smith, D., Verzetti, M., Araujo, M., Tran, N. V., Mamouni, H. El, Gyun, D., Epshteyn, V., Diamantopoulou, M., Cieri, D., Jafari, A., Perez, E., Sahin, M. Ö., Guler, Y., Breeze, S., Mcalister, I., Candelise, V., Pigazzini, S., Acosta, J. G., Montalvo, R., Idris, F. Mohamad, Schuh, T., Lethuillier, M., Kodolova, O., Woods, N., Smith, G

2020

Overview

A search for$$\\text {W}\\text {W}$$WW production from double-parton scattering processes using same-charge electron-muon and dimuon events is reported, based on proton-proton collision data collected at a center-of-mass energy of$$13\\,\\text {TeV} $$13 TeV . The analyzed data set corresponds to an integrated luminosity of$$77.4{\\,\\text {fb}^{-1}} $$77.4 fb - 1 , collected using the CMS detector at the LHC in 2016 and 2017. Multivariate classifiers are used to discriminate between the signal and the dominant background processes. A maximum likelihood fit is performed to extract the signal cross section. This leads to the first evidence for$$\\text {W}\\text {W}$$WW production via double-parton scattering, with a significance of 3.9 standard deviations. The measured inclusive cross section is$$1.41\\pm 0.28\\,\\text {(stat)} \\pm 0.28\\,\\text {(syst)} \\,\\text {pb} $$1.41 ± 0.28 (stat) ± 0.28 (syst) pb .