Search for Lepton Flavor Violation in ϒ(3S)→e^{±}μ^{∓}

Search for Lepton Flavor Violation in ϒ(3S)→e^{±}μ^{∓}

We report on the first search for electron-muon lepton flavor violation (LFV) in the decay of a b quark and b antiquark bound state. We look for the LFV decay ϒ(3S)→e^{±}μ^{∓} in a sample of 118 million ϒ(3S) mesons from 27  fb^{-1} of data collected with the BABAR detector at the SLAC PEP-II e^{+}e...

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Veröffentlicht in:Physical review letters 2022-03, Vol.128 (9), p.091804-091804, Article 091804
Hauptverfasser: Lees, J P, Poireau, V, Tisserand, V, Grauges, E, Palano, A, Eigen, G, Brown, D N, Kolomensky, Yu G, Fritsch, M, Koch, H, Schroeder, T, Cheaib, R, Hearty, C, Mattison, T S, McKenna, J A, So, R Y, Blinov, V E, Buzykaev, A R, Druzhinin, V P, Golubev, V B, Kozyrev, E A, Kravchenko, E A, Onuchin, A P, Serednyakov, S I, Skovpen, Yu I, Solodov, E P, Todyshev, K Yu, Lankford, A J, Dey, B, Gary, J W, Long, O, Eisner, A M, Lockman, W S, Panduro Vazquez, W, Chao, D S, Cheng, C H, Echenard, B, Flood, K T, Hitlin, D G, Kim, J, Li, Y, Lin, D X, Middleton, S, Miyashita, T S, Ongmongkolkul, P, Oyang, J, Porter, F C, Röhrken, M, Huard, Z, Meadows, B T, Pushpawela, B G, Sokoloff, M D, Sun, L, Smith, J G, Wagner, S R, Bernard, D, Verderi, M, Bettoni, D, Bozzi, C, Calabrese, R, Cibinetto, G, Fioravanti, E, Garzia, I, Luppi, E, Santoro, V, Calcaterra, A, de Sangro, R, Finocchiaro, G, Martellotti, S, Patteri, P, Peruzzi, I M, Piccolo, M, Rotondo, M, Zallo, A, Passaggio, S, Patrignani, C, Shuve, B J, Lacker, H M, Bhuyan, B, Mallik, U, Chen, C, Cochran, J, Prell, S, Gritsan, A V, Arnaud, N, Davier, M, Le Diberder, F, Lutz, A M, Wormser, G, Lange, D J, Wright, D M, Coleman, J P, Gabathuler, E, Hutchcroft, D E, Payne, D J, Touramanis, C, Bevan, A J, Di Lodovico, F, Sacco, R, Cowan, G
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Sprache:eng
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Zusammenfassung:We report on the first search for electron-muon lepton flavor violation (LFV) in the decay of a b quark and b antiquark bound state. We look for the LFV decay ϒ(3S)→e^{±}μ^{∓} in a sample of 118 million ϒ(3S) mesons from 27  fb^{-1} of data collected with the BABAR detector at the SLAC PEP-II e^{+}e^{-} collider operating with a 10.36 GeV center-of-mass energy. No evidence for a signal is found, and we set a limit on the branching fraction B[ϒ(3S)→e^{±}μ^{∓}]80  TeV on the energy scale Λ_{NP} divided by the coupling-squared g_{NP}^{2} of relevant new physics (NP).
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.128.091804