Search for contact interactions in dimuon events from pp collisions at √s=7 TeV with the ATLAS detector

• Published in: Physical review. D, Particles, fields, gravitation, and cosmology Particles, fields, gravitation, and cosmology, 2011-07, Vol.84 (1)
• Main Authors: Alexa, C., Artoni, G., Asai, S., Asquith, L., Austin, N., Barber, T., Belanger-Champagne, C., Beloborodova, O., Bocci, A., Boddy, C. R., Bromberg, C., Buttar, C. M., Caprini, I., Caron, B., Castro, N. F., Cevenini, F., De La Taille, C., Dell’Asta, L., Dobbs, M., Dobson, E., Dube, S., Duckeck, G., Düren, M., Eckert, S., Espinal Curull, X., Fabbri, L., Fanti, M., Fassnacht, P., Fedorko, W., Föhlisch, F., Gabaldon, C., Gianotti, F., Gilewsky, V., Gladilin, L. K., Gössling, C., Gonzalez Silva, M. L., Griffiths, J., Hanke, P., Hauschild, M., Horn, C., Hughes, E. W., Ibbotson, M., Jimenez Belenguer, M., Kasmi, A., Kawamura, G., Klier, A., Kortner, O., Kwee, R., Labarga, L., Lacava, F., Laporte, J. F., Lasseur, C., Lendermann, V., Lesser, J., Lipeles, E., Liu, S., Loddenkoetter, T., Lund-Jensen, B., Lundberg, J., Massol, N., Masubuchi, T., Maxfield, S. J., Mechnich, J., Mehdiyev, R., Moraes, A., Morello, G., Nordberg, M., Nunnemann, T., Ouchrif, M., Palestini, S., Pásztor, G., Peleganchuk, S. V., Popeneciu, G. A., Protopopescu, S., Resende, B., Rodriguez Garcia, Y., Sauvage, G., Savinov, V., Schram, M., Schultz-Coulon, H.-C., Shaw, K., Silva, J., Spigo, G., Spiwoks, R., Stamen, R., Stavina, P., Stenzel, H., Thompson, A. S., Tomoto, M., Torchiani, I., Uchida, K., van der Poel, E., Verducci, M., Vuillermet, R., Vukotic, I., Wingerter-Seez, I., Yanush, S., Yao, Y., Young, C., Zaidan, R.
• Format: Article
• Language: English
• ISSN: 1550-7998; 1550-2368

A search for contact interactions has been performed using dimuon events recorded with the ATLAS detector in proton-proton collisions at √s=7 TeV. The data sample corresponds to an integrated luminosity of 42 pb⁻¹. No significant deviation from the standard model is observed in the dimuon mass spectrum, allowing the following 95% C.L. limits to be set on the energy scale of contact interactions: Λ>4.9 TeV (4.5 TeV) for constructive (destructive) interference in the left-left isoscalar compositeness model. These limits are the most stringent to date for μμqq contact interactions.