Search for CP violation in t[bar over t¯] production and decay in proton-proton collisions at √s=8 TeV
Author(s)Abercrombie, Daniel Robert; Allen, Brandon Leigh; Apyan, Aram; Barbieri, Richard Alexander; Baty, Austin Alan; Bi, Ran; Bierwagen, Katharina; Brandt, Stephanie Akemi; Busza, Wit; Cali, Ivan Amos; Demiragli, Zeynep; Di Matteo, Leonardo; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Hsu, Dylan George; Iiyama, Yutaro; Innocenti, Gian Michele; Klute, Markus; Kovalskyi, Dmytro; Krajczar, Krisztian F.; Lai, Yue Shi; Lee, Yen-Jie; Levin, Andrew Michael; Luckey Jr, P David; Maier, Benedikt; Marini, Andrea Carlo; McGinn, Christopher Francis; Mironov, Camelia Maria; Narayanan, Siddharth Madhavan; Niu, Xinmei; Paus, Christoph M. E.; Roland, Christof E; Salfeld-Nebgen, Jakob Maxillian Henry; Stephans, George S. F.; Sumorok, Konstanty C; Tatar, Kaya; Varma, Mukund Madhav; Velicanu, Dragos Alexandru; Veverka, Jan; Wang, J.; Wang, Ta-Wei; Yang, Mingming; Wyslouch, Victoria; ... Show more Show less
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The results of a first search for CP violation in the production and decay of top quark-antiquark (t[bar over t]) 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 TeV collected by the CMS experiment, corresponding to an integrated luminosity of 19.7 fb[superscript −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[bar over t] production and decay. The measured asymmetries exhibit no evidence for CP-violating effects, consistent with the expectation from the standard model. Keywords: CP violation, Hadron-Hadron scattering (experiments), Top physics
DepartmentMassachusetts Institute of Technology. Department of Nuclear Science and Engineering; Massachusetts Institute of Technology. Department of Physics
Journal of High Energy Physics
The CMS collaboration, et al. “Search for CP Violation in t[bar over t ¯] Production and Decay in Proton-Proton Collisions at √s = 8 TeV.” Journal of High Energy Physics, vol. 2017, no. 3, Mar. 2017. © 2017, The Author(s).
Final published version