13 research outputs found
Testing the Higgs Mechanism in the Lepton Sector with multi-TeV e+e- Collisions
Multi-TeV e+e- collisions provide with a large enough sample of Higgs bosons
to enable measurements of its suppressed decays. Results of a detailed study of
the determination of the muon Yukawa coupling at 3 TeV, based on full detector
simulation and event reconstruction, are presented. The muon Yukawa coupling
can be determined with a relative accuracy of 0.04 to 0.08 for Higgs bosons
masses from 120 GeV to 150 GeV, with an integrated luminosity of 5 inverse-ab.
The result is not affected by overlapping two-photon background.Comment: 6 pages, 2 figures, submitted to J Phys G.: Nucl. Phy
Physics at the CLIC Multi-TeV Linear Collider : report of the CLIC Physics Working Group
This report summarizes a study of the physics potential of the CLIC e+e- linear collider operating at centre-of-mass energies from 1 TeV to 5 TeV with luminosity of the order of 10^35 cm^-2 s^-1. First, the CLIC collider complex is surveyed, with emphasis on aspects related to its physics capabilities, particularly the luminosity and energy, and also possible polarization, \gamma\gamma and e-e- collisions. The next CLIC Test facility, CTF3, and its R&D programme are also reviewed. We then discuss aspects of experimentation at CLIC, including backgrounds and experimental conditions, and present a conceptual detector design used in the physics analyses, most of which use the nominal CLIC centre-of-mass energy of 3 TeV. CLIC contributions to Higgs physics could include completing the profile of a light Higgs boson by measuring rare decays and reconstructing the Higgs potential, or discovering one or more heavy Higgs bosons, or probing CP violation in the Higgs sector. Turning to physics beyond the Standard Model, CLIC might be able to complete the supersymmetric spectrum and make more precise measurements of sparticles detected previously at the LHC or a lower-energy linear e+e- collider: \gamma\gamma collisions and polarization would be particularly useful for these tasks. CLIC would also have unique capabilities for probing other possible extensions of the Standard Model, such as theories with extra dimensions or new vector resonances, new contact interactions and models with strong WW scattering at high energies. In all the scenarios we have studied, CLIC would provide significant fundamental physics information beyond that available from the LHC and a lower-energy linear e+e- collider, as a result of its unique combination of high energy and experimental precision
Physics at the CLIC Multi-TeV Linear Collider
This report summarizes a study of the physics potential of the CLIC e+e-
linear collider operating at centre-of-mass energies from 1 TeV to 5 TeV with
luminosity of the order of 10^35 cm^-2 s^-1. First, the CLIC collider complex
is surveyed, with emphasis on aspects related to its physics capabilities,
particularly the luminosity and energy, and also possible polarization,
\gamma\gamma and e-e- collisions. The next CLIC Test facility, CTF3, and its
R&D programme are also reviewed. We then discuss aspects of experimentation at
CLIC, including backgrounds and experimental conditions, and present a
conceptual detector design used in the physics analyses, most of which use the
nominal CLIC centre-of-mass energy of 3 TeV. CLIC contributions to Higgs
physics could include completing the profile of a light Higgs boson by
measuring rare decays and reconstructing the Higgs potential, or discovering
one or more heavy Higgs bosons, or probing CP violation in the Higgs sector.
Turning to physics beyond the Standard Model, CLIC might be able to complete
the supersymmetric spectrum and make more precise measurements of sparticles
detected previously at the LHC or a lower-energy linear e+e- collider:
\gamma\gamma collisions and polarization would be particularly useful for these
tasks. CLIC would also have unique capabilities for probing other possible
extensions of the Standard Model, such as theories with extra dimensions or new
vector resonances, new contact interactions and models with strong WW
scattering at high energies. In all the scenarios we have studied, CLIC would
provide significant fundamental physics information beyond that available from
the LHC and a lower-energy linear e+e- collider, as a result of its unique
combination of high energy and experimental precision.Comment: 226 pages, lots of figures. A version with high resolution figures
can be found at http://cern.ch/d/deroeck/www/clic/clic_report.htm
Physics with e+ e- linear colliders
We describe the physics potential of linear colliders in this
report. These machines are planned to operate in the first phase at a center-of
--mass energy of 500 GeV, before being scaled up to about 1 TeV. In the second
phase of the operation, a final energy of about 2 TeV is expected. The machines
will allow us to perform precision tests of the heavy particles in the Standard
Model, the top quark and the electroweak bosons. They are ideal facilities for
exploring the properties of Higgs particles, in particular in the intermediate
mass range. New vector bosons and novel matter particles in extended gauge
theories can be searched for and studied thoroughly. The machines provide
unique opportunities for the discovery of particles in supersymmetric
extensions of the Standard Model, the spectrum of Higgs particles, the
supersymmetric partners of the electroweak gauge and Higgs bosons, and of the
matter particles. High precision analyses of their properties and interactions
will allow for extrapolations to energy scales close to the Planck scale where
gravity becomes significant. In alternative scenarios, like compositeness
models, novel matter particles and interactions can be discovered and
investigated in the energy range above the existing colliders up to the TeV
scale. Whatever scenario is realized in Nature, the discovery potential of
linear colliders and the high-precision with which the properties of
particles and their interactions can be analysed, define an exciting physics
programme complementary to hadron machines.Comment: 103 pages, Late
ILC Reference Design Report Volume 4 - Detectors
This report, Volume IV of the International Linear Collider Reference Design Report, describes the detectors which will record and measure the charged and neutral particles produced in the ILC's high energy e+e- collisions. The physics of the ILC, and the environment of the machine-detector interface, pose new challenges for detector design. Several conceptual designs for the detector promise the needed performance, and ongoing detector R&D is addressing the outstanding technological issues. Two such detectors, operating in push-pull mode, perfectly instrument the ILC interaction region, and access the full potential of ILC physics.This report, Volume IV of the International Linear Collider Reference Design Report, describes the detectors which will record and measure the charged and neutral particles produced in the ILC's high energy e+e- collisions. The physics of the ILC, and the environment of the machine-detector interface, pose new challenges for detector design. Several conceptual designs for the detector promise the needed performance, and ongoing detector R&D is addressing the outstanding technological issues. Two such detectors, operating in push-pull mode, perfectly instrument the ILC interaction region, and access the full potential of ILC physics