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Measurement of the W boson decay branching fraction ratio B(W-cq)/B(W-qq¯'') in proton-proton collisions at V¯s=13TeV

Abstract: The most precise measurement to date of the W boson hadronic decay branching fraction ratio rwc= B(W-cq)/B(W-qq¯) is presented. The measurement is based on a sample of proton-proton collision data from the CERN LHC collected by the CMS experiment at a center-of-mass energy of 13TeV in 2016-2018 with an integrated luminosity of 138 fb-1. The large cross section of top quark-antiquark production at the LHC offers a sizable high-purity sample of W 3 bosons suitable for this measurement. Events with one charged lepton (electron or muon) and at least four jets, two tagged as bottom quark jets, are analyzed. Charm jets are tagged using the presence of a muon inside the jet. The result, Rwc=00.489+- 0.020, is consistent with the standard model prediction and is twice as precise as the current world-average value.

Autoría: Hayrapetyan A., Tumasyan A., Adam W., Andrejkovic J.W., Benato L., Bergauer T., Chatterjee S., Damanakis K., Dragicevic M., Hussain P.S., Jeitler M., Krammer N., Li A., Liko D., Mikulec I., Schieck J., Schöfbeck R., Schwarz D., Sonawane M., Waltenberger W., Wulz C.E., Janssen T., Van Laer T., Van Mechelen P., Breugelmans N., D'Hondt J., Dansana S., De Moor A., Delcourt M., Heyen F., Lowette S., Makarenko I., Müller D., Tavernier S

Fuente: Physics Letters Section B Nuclear Elementary Particle and High Energy Physics, 2025, 868, 139754

Editorial: Elsevier

Fecha de publicación: 01/09/2025

Nº de páginas: 28

Tipo de publicación: Artículo de Revista

DOI: 10.1016/j.physletb.2025.139754

ISSN: 0370-2693,1873-2445

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