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ISSN - 10298479, Journal of High Energy Physics, 2013, vol. 2014, p. -

First look at the physics case of TLEP

Bicer M., Duran Yildiz H., Yildiz I., Coignet G., Delmastro M., Alexopoulos T., Grojean C., Antusch S., Sen T., He H. J., Potamianos K., Haug S., Moreno A., Heister A., Sanz V., Gomez-Ceballos G., Klute M., Zanetti M., Wang L. T., Dam M., Boehm C., Glover N., Krauss F., Lenz A., Syphers M., Leonidopoulos C., Ciulli V., Lenzi P., Sguazzoni G., Antonelli M., Boscolo M., Dosselli U., Frasciello O., Milardi C., Venanzoni G., Zobov M., Van Der Bij J., De Gruttola M., Kim D. W., Bachtis M., Butterworth A., Bernet C., Botta C., Carminati F., David A., Deniau L., D'Enterria D., Ganis G., Goddard B., Giudice G., Janot P., Jowett J. M., Lourenço C., Malgeri L., Meschi E., Moortgat F., Musella P., Osborne J. A., Perrozzi L., Pierini M., Rinolfi L., De Roeck A., Rojo J., Roy G., Sciabà A., Valassi A., Waaijer C. S., Wenninger J., Woehri H., Zimmermann F., Blondel A., Koratzinos M., Mermod P., Onel Y., Talman R., Castaneda Miranda E., Bulyak E., Porsuk D., Kovalskyi D., Padhi S., Faccioli P., Ellis J. R., Campanelli M., Bai Y., Chamizo M., Appleby R. B., Owen H., Cuna H. Maury, Gracios C., Munoz-Hernandez G. A., Trentadue L., Torrente-Lujan E., Wang S., Bertsche D., Gramolin A., Telnov V., Kado M., Petroff P., Azzi P., Nicrosini O.

The discovery by the ATLAS and CMS experiments of a new boson with mass around 125 GeV and with measured properties compatible with those of a Standard-Model Higgs boson, coupled with the absence of discoveries of phenomena beyond the Standard Model at the TeV scale, has triggered interest in ideas for future Higgs factories. A new circular e+e- collider hosted in a 80 to 100 km tunnel, TLEP, is among the most attractive solutions proposed so far. It has a clean experimental environment, produces high luminosity for top-quark, Higgs boson, W and Z studies, accommodates multiple detectors, and can reach energies up to the\mathrm{t}\overline{\mathrm{t}} threshold and beyond. It will enable measurements of the Higgs boson properties and of Electroweak Symmetry-Breaking (EWSB) parameters with unequalled precision, offering exploration of physics beyond the Standard Model in the multi-TeV range. Moreover, being the natural precursor of the VHE-LHC, a 100 TeV hadron machine in the same tunnel, it builds up a long-term vision for particle physics. Altogether, the combination of TLEP and the VHE-LHC offers, for a great cost effectiveness, the best precision and the best search reach of all options presently on the market. This paper presents a first appraisal of the salient features of the TLEP physics potential, to serve as a baseline for a more extensive design study. [Figure not available: see fulltext.] © 2014 SISSA, Trieste, Italy.