First look at the physics case of TLEP
Authors:   The TLEP Design Study Working Group, 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. , Piccinini F. , Montagna G. , Kapusta F. , Laplace S. , da Silva W. , Gizani N. , Craig N. , Han T. , Luci C. , Mele B. , Silvestrini L. , Ciuchini M. , Cakir R. , Aleksan R. , Couderc F. , Ganjour S. , Lançon E. , Locci E. , Schwemling P. , Spiro M. , Tanguy C. , Zinn-Justin J. , Moretti S. , Kikuchi M. , Koiso H. , Ohmi K. , Oide K. , Pauletta G. , Ruiz de Austri R. , Gouzevitch M. , Chattopadhyay S. 
Published: February 2014

Abstract

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.