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A.Betancourt, C.Betti, F.Bezshyiko, Ia.Bhom, J.Bian, L.Bieker, M. S.Biesuz, N. V.Bifani, S.Billoir, P.Biolchini, A.Birch, M.Bishop, F. C. R.Bitadze, A.Bizzeti, A.Blago, M. P.Blake, T.Blanc, F.Blank, J. E.Blusk, S.Bobulska, D.Boelhauve, J. A.Boente Garcia, O.Boettcher, T.Boldyrev, A.Bolognani, C. S.Bolzonella, R.Bondar, N.Borgato, F.Borghi, S.Borsato, M.Borsuk, J. T.Bouchiba, S. A.Bowcock, T. J. V.Boyer, A.Bozzi, C.Bradley, M. J.Braun, S.Brea Rodriguez, A.Brodzicka, J.Brossa Gonzalo, A.Brown, J.Brundu, D.Buonaura, A.Buonincontri, L.Burke, A. T.Burr, C.Bursche, A.Butkevich, A.Butter, J. S.Buytaert, J.Byczynski, W.Cadeddu, S.Cai, H.Calabrese, R.Calefice, L.Cali, S.Calladine, R.Calvi, M.Calvo Gomez, M.Campana, P.Campora Perez, D. H.Campoverde Quezada, A. F.Capelli, S.Capriotti, L.Carbone, A.Cardinale, R.Cardini, A.Carniti, P.Carus, L.Casais Vidal, A.Caspary, R.Casse, G.Cattaneo, M.Cavallero, G.Cavallini, V.Celani, S.Cerasoli, J.Cervenkov, D.Chadwick, A. J.Chahrour, I.Chapman, M. G.Charles, 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S.Dobishuk, V.Dolmatov, A.Dong, C.Donohoe, A. M.Dordei, F.dos Reis, A. C.Douglas, L.Downes, A. G.Duda, P.Dudek, M. W.Dufour, L.Duk, V.Durante, P.Duras, M. M.Durham, J. M.Dutta, D.Dziurda, A.Dzyuba, A.Easo, S.Egede, U.Egorychev, V.Eirea Orro, C.Eisenhardt, S.Ejopu, E.Ek-In, S.Eklund, L.Elashri, M. EEllbracht, J.Ely, S.Ene, A.Epple, E.Escher, S.Eschle, J.Esen, S.Evans, T.Fabiano, F.Falcao, L. N.Fan, Y.Fang, B.Fantini, L.Faria, M.Farry, S.Fazzini, D.Felkowski, L. FFeo, M.Fernandez Gomez, M.Fernez, A. D.Ferrari, F.Ferreira Lopes, L.Ferreira Rodrigues, F.Ferreres Sole, S.Ferrillo, M.Ferro-Luzzi, M.Filippov, S.Fini, R. A.Fiorini, M.Firlej, M.Fischer, K. M.Fitzgerald, D. S.Fitzpatrick, C.Fiutowski, T.Fleuret, F.Fontana, M.Fontanelli, F.Forty, R.Foulds-Holt, D.Franco Lima, V.Franco Sevilla, M.Frank, M.Franzoso, E.Frau, G.Frei, C.Friday, D. A.Frontini, L.Fu, J.Fuehring, Q.Fulghesu, T.Gabriel, E.Galati, G.Galati, M. D.Gallas Torreira, A.Galli, D.Gambetta, S.Gandelman, M.Gandini, P.Gao, H. GGao, 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A.Szumlak, T.Szymanski, M.Tan, Y.Taneja, S.Tat, M. D.Terentev, A.Teubert, F.Thomas, E.Thompson, D. J. D.Thomson, K. A.Tilquin, H.Tisserand, V.T’Jampens, S.Tobin, M.Tomassetti, L.Tonani, G.Tong, X.Torres Machado, D.Tou, D. Y.Trippl, C.Tuci, G.Tuning, N.Ukleja, A.Unverzagt, D. J.Usachov, A.Ustyuzhanin, A.Uwer, U.Vagner, A.Vagnoni, V.Valassi, A.Valenti, G.Valls Canudas, N.Van Dijk, M.Van Hecke, H.van Herwijnen, E.Van Hulse, C. B.van Veghel, M.Vazquez Gomez, R.Vazquez Regueiro, P.Vázquez Sierra, C.Vecchi, S.Velthuis, J. J.Veltri, M.Venkateswaran, A.Veronesi, M.Vesterinen, M.Vieira, D.Vieites Diaz, M.Vilasis-Cardona, X.Vilella Figueras, E.Villa, A.Vincent, P.Volle, F. C.vom Bruch, D.Vorobyev, A.Vorobyev, V.Voropaev, N.Vos, K.Vrahas, C.Walsh, J.Walton, E. J.Wan, G.Wang, C.Wang, G.Wang, J.Wang, M.Wang, R.Wang, X.Wang, Y.Wang, Z.Ward, J. A.Watson, N. K.Websdale, D.Wei, Y.Westhenry, B. D. C.White, D. J.Whitehead, M.Wiederhold, A. R.Wiedner, D.Wilkinson, G.Wilkinson, M. K.Williams, I.Williams, M.Williams, M. R. J.Williams, R.Wilson, F. F.Wislicki, W.Witek, M.Witola, L.Wong, C. P.Wormser, G.Wotton, S. A.Wu, H.Wu, J.Wyllie, K.Xiang, Z.Xie, Y.Xu, A.Xu, J.Xu, L.Xu, M.Xu, Q.Xu, Z.Yang, D.Yang, S.Yang, X.Yang, Y.Yang, Z.Yeomans, L. E.Yeroshenko, V.Yeung, H.Yin, H.Yu, J.Yuan, X.Zaffaroni, E.Zavertyaev, M.Zdybal, M.Zeng, M.Zhang, C.Zhang, D.Zhang, L.Zhang, S.Zhang, Y.Zhao, Y.Zharkova, A.Zhelezov, A.Zheng, Y.Zhou, T.Zhou, X.Zhou, Y.Zhovkovska, V.Zhu, X.Zhu, Z.Zhukov, V.Zou, Q.Zucchelli, S.Zuliani, D.Zunica, G.2022-12-212022-12-212022-12-21202310.1103/PhysRevLett.131.051803https://infoscience.epfl.ch/handle/20.500.14299/193478The first simultaneous test of muon-electron universality using $B^{+}\rightarrow K^{+}\ell^{+}\ell^{-}$ and $B^{0}\rightarrow K^{*0}\ell^{+}\ell^{-}$ decays is performed, in two ranges of the dilepton invariant-mass squared, $q^{2}$. The analysis uses beauty mesons produced in proton-proton collisions collected with the LHCb detector between 2011 and 2018, corresponding to an integrated luminosity of 9 $\mathrm{fb}^{-1}$. Each of the four lepton universality measurements reported is either the first in the given $q^{2}$ interval or supersedes previous LHCb measurements. The results are compatible with the predictions of the Standard Model. All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-046.html (LHCb public pages)text::journal::journal article::research article