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URN: urn:nbn:de:swb:90-691422

Search for CP violation in tt¯ production and decay in proton-proton collisions at √s=8 TeV

CMS Collaboration; Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Brondolin, E.; Dragicevic, M.; Erö, J.; Flechl, M.; Friedl, M.; Frühwirth, R.; Ghete, V. M.; Hartl, C.; Hörmann, N.; Hrubec, J.; Jeitler, M.; König, A.; Krätschmer, I.; ... mehr

Abstract:
The results of a first search for CP violation in the production and decay of top quark-antiquark ( t t ¯ tt¯ ) pairs are presented. The search is based on asymmetries in T-odd, triple-product correlation observables, where T is the time-reversal operator. The analysis uses a sample of proton-proton collisions at s = 8 s√=8 TeV collected by the CMS experiment, corresponding to an integrated luminosity of 19.7 fb −1 . Events are selected having one electron or muon and at least four jets. The T-odd observables are measured using four-momentum vectors associated with t t ¯ tt¯ production and decay. The measured asymmetries exhibit no evidence for CP-violating effects, consistent with the expectation from the standard model.


Zugehörige Institution(en) am KIT Institut für Experimentelle Kernphysik (IEKP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator ISSN: 1029-8479, 1126-6708
KITopen ID: 1000069142
Erschienen in Journal of high energy physics
Band 2017
Heft 3
Seiten Art.Nr.: 101
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
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