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    Alexa, C.; Backovic, S.; Baghdasaryan, S.; Bozovic-Jelisavcic, I.; Brandt, G.; Brinkmann, M.; Brisson, V.; Britzger, D.; Bunyatyan, A.; Buschhorn, G.; Cantun Avila, K. B.; Ceccopieri, F.; Cerny, K.; Cerny, V.; Contreras, J. G.; Coughlan, J. A.; Cvach, J.; Dodonov, V.; Dossanov, A.; Dubak, A.; Egli, S.; Eliseev, A.; Elsen, E.; Favart, L.; Fedotov, A.; Ferencei, J.; Gabathuler, E.; Gayler, J.; Glazov, A.; Goerlich, L.; Gogitidze, N.; Habib, S.; Henderson, R. C. W.; Hennekemper, E.; Henschel, H.; Hildebrandt, M.; Hiller, K. H.; Hoffmann, D.; Horisberger, R.; Janssen, X.; Jönsson, Leif; Jung, H.; Kenyon, I. R.; Kleinwort, C.; Kostka, P.; Kraemer, M.; Kretzschmar, J.; Krueger, K.; Lebedev, A.; Lendermann, V.; List, J.; Marage, P.; Mehta, A.; Meyer, J.; Mikocki, S.; Morris, J. V.; Mudrinic, M.; Mueller, K.; Naumann, Th; Nowak, G.; Ozerov, D.; Pandurovic, M.; Papadopoulou, Th; Perez, E.; Picuric, I.; Piec, S.; Pitzl, D.; Placakyte, R.; Pokorny, B.; Povh, B.; Radescu, V.; Raicevic, N.; Ravdandorj, T.; Reimer, P.; Roosen, R.; Rusakov, S.; Salek, D.; Sankey, D. P. C.; Schultz-Coulon, H. -C.; Sefkow, F.; Shtarkov, L. N.; Sloan, T.; Smiljanic, I.; Soloviev, Y.; Spaskov, V.; Staykova, Z.; Stoicea, G.; Straumann, U.; Sykora, T.; Thompson, P. D.; Tran, T. H.; Tsakov, I.; Urban, K.; Van Mechelen, P.; Vazdik, Y.; Wegener, D.; Wuensch, E.; Zalesak, J.; Zhang, Z.; Zomer, F.

    Physics letters. B, 11/2011, Letnik: 705, Številka: 1-2
    Journal Article

    A search for physics beyond the Standard Model in neutral current deep inelastic scattering at high negative four-momentum transfer squared Q(2) is performed in e(+/-)p collisions at HERA. The differential cross section d sigma/dQ(2), measured using the full H1 data sample corresponding to an integrated luminosity of 446 pb(-1), is compared to the Standard Model prediction. No significant deviation is observed. Limits on various models predicting new phenomena at high Q(2) are derived. For general four-fermion eeqq contact interaction models, lower limits on the compositeness scale A are set in the range 3.6 TeV to 7.2 TeV. Leptoquarks with masses M-LQ and couplings lambda are constrained to M-LQ/lambda > 0.41-1.86 TeV and limits on squarks in R-parity violating supersymmetric models are derived. A lower limit on the gravitational scale in 4 + n dimensions of M-S > 0.9 TeV is established for low-scale quantum gravity effects in models with large extra dimensions. For the light quark radius an upper bound of R-q < 0.65 . 10(-18) m is determined. (C) 2011 Elsevier B.V. All rights reserved.