Abstract
Using the ZEUS detector at HERA, we have searched for heavy excited states of electrons, neutrinos, and quarks in e+p collisions at a center-of-mass energy of 300 GeV. With an integrated luminosity of 9.4 pb-1, no evidence was found for electroweak production and decay of such states. Limits on the production cross section times branching ratio and on the characteristic couplings, f/Λ, are derived for masses up to 250 GeV. For the particular choice f/Λ = 1/Mf*, we exclude at the 95% confidence level excited electrons with mass between 30 and 200 GeV, excited electron neutrinos with mass between 40 and 96 GeV, and quarks excited electroweakly with mass between 40 and 169 GeV.
| Original language | English |
|---|---|
| Pages (from-to) | 631-646 |
| Number of pages | 16 |
| Journal | Zeitschrift fur Physik C-Particles and Fields |
| Volume | 76 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 1 Dec 1997 |
| Externally published | Yes |
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In: Zeitschrift fur Physik C-Particles and Fields, Vol. 76, No. 4, 01.12.1997, p. 631-646.
Research output: Contribution to journal › Article › peer-review
TY - JOUR
T1 - A search for excited fermions in e+p collisions at HERA
AU - Breitweg, J.
AU - Derrick, M.
AU - Krakauer, D.
AU - Magill, S.
AU - Mikunas, D.
AU - Musgrave, B.
AU - Repond, J.
AU - Stanek, R.
AU - Talaga, R. L.
AU - Yoshida, R.
AU - Zhang, H.
AU - Mattingly, M. C.K.
AU - Anselmo, F.
AU - Antonioli, P.
AU - Bari, G.
AU - Basile, M.
AU - Bellagamba, L.
AU - Boscherini, D.
AU - Bruni, A.
AU - Bruni, G.
AU - Cara Romeo, G.
AU - Castellini, G.
AU - Cifarelli, L.
AU - Cindolo, F.
AU - Contin, A.
AU - Corradi, M.
AU - De Pasquale, S.
AU - Gialas, I.
AU - Giusti, P.
AU - Iacobucci, G.
AU - Laurenti, G.
AU - Levi, G.
AU - Margotti, A.
AU - Massam, T.
AU - Nania, R.
AU - Palmonari, F.
AU - Pesci, A.
AU - Polini, A.
AU - Ricci, F.
AU - Sartorelli, G.
AU - Zamora Garcia, Y.
AU - Zichichi, A.
AU - Amelung, C.
AU - Bornheim, A.
AU - Brock, I.
AU - Coböken, K.
AU - Crittenden, J.
AU - Deffner, R.
AU - Eckert, M.
AU - Feld, L.
AU - Grothe, M.
AU - Hartmann, H.
AU - Heinloth, K.
AU - Heinz, L.
AU - Hilger, E.
AU - Jakob, H. P.
AU - Katz, U. F.
AU - Kerger, R.
AU - Paul, E.
AU - Pfeiffer, M.
AU - Rembser, Ch
AU - Stamm, J.
AU - Wedemeyer, R.
AU - Wieber, H.
AU - Bailey, D. S.
AU - Campbell-Robson, S.
AU - Cottingham, W. N.
AU - Foster, B.
AU - Hall-Wilton, R.
AU - Hayes, M. E.
AU - Heath, G. P.
AU - Heath, H. F.
AU - Piccioni, D.
AU - Roff, D. G.
AU - Tapper, R. J.
AU - Arneodo, M.
AU - Ayad, R.
AU - Capua, M.
AU - Garfagnini, A.
AU - Iannotti, L.
AU - Schioppa, M.
AU - Susinno, G.
AU - Kim, J. Y.
AU - Lee, J. H.
AU - Lim, I. T.
AU - Pac, M. Y.
AU - Caldwell, A.
AU - Cartiglia, N.
AU - Jing, Z.
AU - Liu, W.
AU - Mellado, B.
AU - Parsons, J. A.
AU - Ritz, S.
AU - Sampson, S.
AU - Sciulli, F.
AU - Straub, P. B.
AU - Zhu, Q.
AU - Borzemski, P.
AU - Chwastowski, J.
AU - Eskreys, A.
AU - Jakubowski, Z.
AU - Przybycień, M. B.
AU - Zachara, M.
AU - Zawiejski, L.
AU - Adamczyk, L.
AU - Bednarek, B.
AU - Jeleń, K.
AU - Kisielewska, D.
AU - Kowalski, T.
AU - Rulikowska-Zarȩbska, E.
AU - Suszycki, L.
AU - Zaja̧c, J.
AU - Duliński, Z.
AU - Kotański, A.
AU - Abbiendi, G.
AU - Bauerdick, L. A.T.
AU - Behrens, U.
AU - Beier, H.
AU - Bienlein, J. K.
AU - Cases, G.
AU - Deppe, O.
AU - Desler, K.
AU - Drews, G.
AU - Fricke, U.
AU - Gilkinson, D. J.
AU - Glasman, C.
AU - Göttlicher, P.
AU - Große-Knetter, J.
AU - Haas, T.
AU - Hain, W.
AU - Hasell, D.
AU - Johnson, K. P.
AU - Kasemann, M.
AU - Koch, W.
AU - Kötz, U.
AU - Kowalski, H.
AU - Labs, J.
AU - Lindemann, L.
AU - Löhr, B.
AU - Löwe, M.
AU - Mańczak, O.
AU - Milewski, J.
AU - Monteiro, T.
AU - Ng, J. S.T.
AU - Notz, D.
AU - Ohrenberg, K.
AU - Park, I. H.
AU - Pellegrino, A.
AU - Pelucchi, F.
AU - Piotrzkowski, K.
AU - Roco, M.
AU - Rohde, M.
AU - Roldán, J.
AU - Ryan, J. J.
AU - Savin, A. A.
AU - Schneekloth, U.
AU - Selonke, F.
AU - Surrow, B.
AU - Tassi, E.
AU - Voß, T.
AU - Westphal, D.
AU - Wolf, G.
AU - Wollmer, U.
AU - Youngman, C.
AU - Zarnecki, A. F.
AU - Zeuner, W.
AU - Adamus, M.
AU - Coldewey, C.
AU - Eisenberg, Y.
AU - Hochman, D.
AU - Karshon, U.
AU - Revel, D.
AU - Badgett, W. F.
AU - Chapin, D.
AU - Cross, R.
AU - Dasu, S.
AU - Foudas, C.
AU - Loveless, R. J.
AU - Mattingly, S.
AU - Reeder, D. D.
AU - Smith, W. H.
AU - Vaiciulis, A.
AU - Wodarczyk, M.
AU - Bhadra, S.
AU - Frisken, W. R.
AU - Khakzad, M.
AU - Schmidke, W. B.
AU - Kuze, M.
N1 - Funding Information: A also at IROE Florence, Italy B now at Univ. of Salerno and INFN Napoli, Italy C now at Univ. of Crete, Greece D supported by Worldlab, Lausanne, Switzerland E now OPAL F retired G also at University of Torino and Alexander von Humboldt Fellow at University of Hamburg H now at Dongshin University, Naju, Korea I also at DESY J Alfred P. Sloan Foundation Fellow K supported by the Polish State Committee for Scientific Research, grant No. 2P03B14912 L supported by an EC fellowship number ERBFMBICT 950172 M now at SAP A.G., Walldorf N visitor from Florida State University O now at ALCATEL Mobile Communication GmbH, Stuttgart P supported by European Community Program PRAXIS XXI Q now at DESY-Group FDET R now at DESY Computer Center S visitor from Kyungpook National University, Taegu, Korea, partially supported by DESY T now at Fermi National Accelerator Laboratory (FNAL), Batavia, IL, USA U now at NORCOM Infosystems, Hamburg V now at Oxford University, supported by DAAD fellowship HSP II-AUFE III W now at ATLAS Collaboration, Univ. of Munich X now at Clinical Operational Research Unit, University College, London Y on leave from MSU, supported by the GIF, contract I-0444-176.07/95 Z now a self-employed consultant AA supported by an EC fellowship AB PPARC Post-doctoral Fellow AC now at Conduit Communications Ltd., London, U.K. AD now at CERN AE supported by JSPS Postdoctoral Fellowships for Research Abroad AF now at Wayne State University, Detroit AG now at Department of Energy, Washington AH now at Lawrence Berkeley Laboratory, Berkeley, CA, USA AI now at Yale University, New Haven, CT AJ supported by a MINERVA Fellowship AK partially supported by DESY AL present address: Tokyo Metropolitan College of Allied Medical Sciences, Tokyo 116, Japan AM supported by the Polish State Committee for Scientific Research, grant No. 2P03B09308 AN supported by the Polish State Committee for Scientific Research, grant No. 2P03B09208 Funding Information: a supported by the Natural Sciences and Engineering Research Council of Canada (NSERC) b supported by the FCAR of Québec, Canada Funding Information: c supported by the German Federal Ministry for Education and Science, Research and Technology (BMBF), under contract numbers 057BN19P, 057FR19P, 057HH19P, 057HH29P, 057SI75I d supported by the MINERVA Gesellschaft für Forschung GmbH, the German Israeli Foundation, and the U.S.-Israel Binational Science Foundation e supported by the German Israeli Foundation, and by the Israel Science Foundation f supported by the Italian National Institute for Nuclear Physics (INFN) g supported by the Japanese Ministry of Education, Science and Culture (the Monbusho) and its grants for Scientific Research h supported by the Korean Ministry of Education and Korea Science and Engineering Foundation i supported by the Netherlands Foundation for Research on Matter (FOM) j supported by the Polish State Committee for Scientific Research, grant No. 115/E-343/SPUB/P03/002/97, 2P03B10512, 2P03B10612, 2P03B14212, 2P03B10412 k supported by the Polish State Committee for Scientific Research (grant No. 2P03B08308) and Foundation for Polish-German Collaboration l partially supported by the German Federal Ministry for Education and Science, Research and Technology (BMBF) m supported by the German Federal Ministry for Education and Science, Research and Technology (BMBF), and the Fund of Fundamental Research of Russian Ministry of Science and Education and by INTAS-Grant No. 93-63 n supported by the Spanish Ministry of Education and Science through funds provided by CICYT o supported by the Particle Physics and Astronomy Research Council p supported by the US Department of Energy q supported by the US National Science Foundation
PY - 1997/12/1
Y1 - 1997/12/1
N2 - Using the ZEUS detector at HERA, we have searched for heavy excited states of electrons, neutrinos, and quarks in e+p collisions at a center-of-mass energy of 300 GeV. With an integrated luminosity of 9.4 pb-1, no evidence was found for electroweak production and decay of such states. Limits on the production cross section times branching ratio and on the characteristic couplings, f/Λ, are derived for masses up to 250 GeV. For the particular choice f/Λ = 1/Mf*, we exclude at the 95% confidence level excited electrons with mass between 30 and 200 GeV, excited electron neutrinos with mass between 40 and 96 GeV, and quarks excited electroweakly with mass between 40 and 169 GeV.
AB - Using the ZEUS detector at HERA, we have searched for heavy excited states of electrons, neutrinos, and quarks in e+p collisions at a center-of-mass energy of 300 GeV. With an integrated luminosity of 9.4 pb-1, no evidence was found for electroweak production and decay of such states. Limits on the production cross section times branching ratio and on the characteristic couplings, f/Λ, are derived for masses up to 250 GeV. For the particular choice f/Λ = 1/Mf*, we exclude at the 95% confidence level excited electrons with mass between 30 and 200 GeV, excited electron neutrinos with mass between 40 and 96 GeV, and quarks excited electroweakly with mass between 40 and 169 GeV.
UR - https://www.scopus.com/pages/publications/0000764477
U2 - 10.1007/s002880050585
DO - 10.1007/s002880050585
M3 - Article
SN - 0170-9739
VL - 76
SP - 631
EP - 646
JO - Zeitschrift fur Physik C-Particles and Fields
JF - Zeitschrift fur Physik C-Particles and Fields
IS - 4
ER -