Search for excited electrons in ep collisions at HERA
- Aaron, F.D.
- Alexa, C.
- Andreev, V.
- Antunovic, B.
- Aplin, S.
- Asmone, A.
- Astvatsatourov, A.
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- Faulkner, P.J.W.
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- Finke, L.
- Fleischer, M.
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- Gabathuler, E.
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- Ghazaryan, S.
- Glazov, A.
- Glushkov, I.
- Goerlich, L.
- Goettlich, M.
- Gogitidze, N.
- Gouzevitch, M.
- Grab, C.
- Greenshaw, T.
- Grell, B.R.
- Grindhammer, G.
- Habib, S.
- Haidt, D.
- Hansson, M.
- Helebrant, C.
- Henderson, R.C.W.
- Henschel, H.
- Herrera, G.
- Hildebrandt, M.
- Hiller, K.H.
- Hoffmann, D.
- Horisberger, R.
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- Hreus, T.
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- Kluge, T.
- Knutsson, A.
- Kogler, R.
- Korbel, V.
- Kostka, P.
- Kraemer, M.
- Krastev, K.
- Kretzschmar, J.
- Kropivnitskaya, A.
- Krüger, K.
- Kutak, K.
- Landon, M.P.J.
- Lange, W.
- Laštovička-Medin, G.
- Laycock, P.
- Lebedev, A.
- Leibenguth, G.
- Lendermann, V.
- Levonian, S.
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- Ruiz Tabasco, J.E.
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- Salvaire, F.
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- Sauvan, E.
- Schmidt, S.
- Schmitt, S.
- Schmitz, C.
- Schoeffel, L.
- Schöning, A.
- Schultz-Coulon, H.-C.
- Sefkow, F.
- Shaw-West, R.N.
- Sheviakov, I.
- Shtarkov, L.N.
- Shushkevich, S.
- Sloan, T.
- Smiljanic, I.
- Smirnov, P.
- Soloviev, Y.
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- South, D.
- Spaskov, V.
- Specka, A.
- Staykova, Z.
- Steder, M.
- Stella, B.
- Straumann, U.
- Sunar, D.
- Sykora, T.
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- Thompson, G.
- Thompson, P.D.
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- Tomasz, F.
- Tran, T.H.
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- Trinh, T.N.
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- Vallée, C.
- Van Mechelen, P.
- Vargas Trevino, A.
- Vazdik, Y.
- Vinokurova, S.
- Volchinski, V.
- Wegener, D.
- Wessels, M.
- Wissing, Ch.
- Wünsch, E.
- Yeganov, V.
- Žáček, J.
- Zálešák, J.
- Zhang, Z.
- Zhelezov, A.
- Zhokin, A.
- Zhu, Y.C.
- Zimmermann, T.
- Zohrabyan, H.
- Zomer, F.
DOIAbstract
AbstractA search for excited electrons is performed using the full e±p data sample collected by the H1 experiment at HERA, corresponding to a total luminosity of 475 pb−1. The electroweak decays of excited electrons e∗→eγ, e∗→eZ and e∗→νW with subsequent hadronic or leptonic decays of the W and Z bosons are considered. No evidence for excited electron production is found. Mass dependent exclusion limits on e∗ production cross sections and on the ratio f/Λ of the coupling to the compositeness scale are derived within gauge mediated models. These limits extend the excluded region compared to previous excited electron searches. The e∗ production via contact interactions is also addressed for the first time in ep collisions
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