Published January 1, 2022
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Search for charged-lepton flavor violation in top quark production and decay in pp collisions at root s=13 TeV
Creators
- Tumasyan, A.1
- Adam, W.2
- Andrejkovic, J. W.2
- Bergauer, T.2
- Chatterjee, S.2
- Dragicevic, M.2
- Del Valle, A. Escalante2
- Fruehwirth, R.
- Jeitler, M.
- Krammer, N.2
- Lechner, L.2
- Liko, D.2
- Mikulec, I.2
- Paulitsch, P.2
- Pitters, F. M.2
- Schieck, J.
- Schoefbeck, R.2
- Schwarz, D.2
- Templ, S.2
- Waltenberger, W.2
- Waltenberger, W.2
- 1. Yerevan Phys Inst, Yerevan, Armenia
- 2. Inst Hochenergiephys, Vienna, Austria
Description
Results are presented from a search for charged-lepton flavor violating (CLFV) interactions in top quark production and decay in pp collisions at a center-of-mass energy of 13 TeV. The events are required to contain one oppositely charged electron-muon pair in the final state, along with at least one jet identified as originating from a bottom quark. The data correspond to an integrated luminosity of 138 fb(-1), collected by the CMS experiment at the LHC. This analysis includes both the production (q -> e mu t) and decay (t -> e mu q) modes of the top quark through CLFV interactions, with q referring to a u or c quark. These interactions are parametrized using an effective field theory approach. With no significant excess over the standard model expectation, the results are interpreted in terms of vector-, scalar-, and tensor-like CLFV four-fermion effective interactions. Finally, observed exclusion limits are set at 95% confidence levels on the respective branching fractions of a top quark to an e mu pair and an up (charm) quark of 0.13 x 10(-6) (1.31 x 10(-6)), 0.07 x 10(-6) (0.89 x 10(-6)), and 0.25 x 10(-6) (2.59 x 10(-6)) for vector, scalar, and tensor CLFV interactions, respectively.
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