FCC-hh: The Hadron Collider : Future Circular Collider Conceptual Design Report Volume 3

O.A. SAMPAYO; A.ABADA - FCC. COLLABORATION (1349 AUTORES)

EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS

EDP SCIENCES S A

Lugar: Paris; Año: 2019 vol. 228 p. 755 - 1107

1951-6355

Particle physics has arrived at an important moment in its history. The discovery of the Higgs boson, witha mass of 125 GeV, completes the matrix of particles and interactions that has constituted the ?StandardModel? for several decades. This model is a consistent and predictive theory, which has so far provensuccessful at describing all phenomena accessible to collider experiments. However, several experimentalfacts do require the extension of the Standard Model and explanations are needed for observationssuch as the abundance of matter over antimatter, the striking evidence for dark matter and the non-zeroneutrino masses. Theoretical issues such as the hierarchy problem, and, more in general, the dynamicalorigin of the Higgs mechanism, do likewise point to the existence of physics beyond the Standard Model.This report contains the description of a novel research infrastructure based on a highest-energyhadron collider with a centre-of-mass collision energy of 100 TeV and an integrated luminosity of at leasta factor of 5 larger than the HL-LHC. It will extend the current energy frontier by almost an order ofmagnitude. The mass reach for direct discovery will reach several tens of TeV, and allow, for example, toproduce new particles whose existence could be indirectly exposed by precision measurements during theearlier preceding e+e−collider phase. This collider will also precisely measure the Higgs self-couplingand thoroughly explore the dynamics of electroweak symmetry breaking at the TeV scale, to elucidate thenature of the electroweak phase transition. WIMPs as thermal dark matter candidates will be discovered,or ruled out.As a single project, this particle collider infrastructure will serve the world-wide physics communityfor about 25 years and, in combination with a lepton collider (see FCC conceptual design reportvolume 2), will provide a research tool until the end of the 21st century. The European Strategy forParticle Physics (ESPP) update 2013 stated ?To stay at the forefront of particle physics, Europe needsto be in a position to propose an ambitious post-LHC accelerator project at CERN by the time of thenext Strategy update?. The FCC study has implemented the ESPP recommendation by developing along-term vision for an ?accelerator project in a global context?. This document describes the detaileddesign and preparation of a construction project for a post-LHC circular energy frontier collider ?in collaborationwith national institutes, laboratories and universities worldwide?, and enhanced by a strongparticipation of industrial partners. A coordinated preparatory effort can now be based on a core of anever-growing consortium of already more than 135 institutes worldwide.