KIT | KIT-Bibliothek | Impressum | Datenschutz

Measurement of the W boson decay branching fraction ratio B ( W → c q ) / B ( W → q q ¯ ′ ) in proton-proton collisions at √s = 13 TeV

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.; ... mehr

Abstract:

The most precise measurement to date of the W boson hadronic decay branching fraction ratio 𝑅$_c$ $^W$= ℬ(W →cq)∕ℬ(W → q$\overline{q}$′) 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 13 TeV 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 highpurity sample of W 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, 𝑅$_c$ $^W$ = 0.489 ± 0.020, is consistent with the standard model prediction and is
twice as precise as the current world-average value


Verlagsausgabe §
DOI: 10.5445/IR/1000184855
Veröffentlicht am 15.09.2025
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Astroteilchenphysik (IAP)
Institut für Experimentelle Teilchenphysik (ETP)
Institut für Prozessdatenverarbeitung und Elektronik (IPE)
Scientific Computing Center (SCC)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 09.2025
Sprache Englisch
Identifikator ISSN: 0370-2693, 0031-9163, 1873-2410, 1873-2445
KITopen-ID: 1000184855
Erschienen in Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Verlag North-Holland Publishing
Band 868
Seiten 139754
Nachgewiesen in OpenAlex
Dimensions
Scopus
KIT – Die Universität in der Helmholtz-Gemeinschaft
KITopen Landing Page