Search for charged-lepton flavor violation in top quark production and decay in pp collisions at √s = 13 TeV

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 on...

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Published in:Journal of high energy physics Vol. 6. P. 82 (1-42)
Other Authors: Tumasyan, Armen, Adam, Wolfgang, Andrejkovic, Janik Walter, Borshch, Vladislav, Ivanchenko, Vladimir, Tcherniaev, Evgueni
Format: Article
Language:English
Subjects:
Online Access:http://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001001009
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520 3 |a 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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655 4 |a статьи в журналах  |9 884420 
700 1 |a Tumasyan, Armen  |9 510818 
700 1 |a Adam, Wolfgang  |9 510819 
700 1 |a Andrejkovic, Janik Walter  |9 882239 
700 1 |a Borshch, Vladislav  |9 510820 
700 1 |a Ivanchenko, Vladimir  |9 500157 
700 1 |a Tcherniaev, Evgueni  |9 500158 
773 0 |t Journal of high energy physics  |d 2022  |g Vol. 6. P. 82 (1-42)  |x 1126-6708 
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