1 - Introduction 2 - Small-Angle Bhabha Scattering and the Luminosity Measurement 3 - Z^0 Physics 4 - Fits to Precision Data 5 - Physics at LEP2 6 - Conclusions

Bhabha scattering

10.1007/bf02845546

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HE-LHC: The High-Energy Large Hadron Collider

The European Physical Journal Special Topics (2019)

A. Abada M. Abbrescia Shehu AbdusSalam I. M. Abdyukhanov J. Abelleira Fernandez

In response to the 2013 Update of the European Strategy for Particle Physics (EPPSU), the Future Circular Collider (FCC) study was launched as a world-wide international collaboration hosted by CERN. The FCC study covered an energy-frontier hadron collider (FCC-hh), a highest-luminosity high-energy lepton collider (FCC-ee), the corresponding 100 km tunnel infrastructure, as well as the physics opportunities of these two colliders, and a high-energy LHC, based on FCC-hh technology. This document constitutes the third volume of the FCC Conceptual Design Report, devoted to the hadron collider FCC-hh. It summarizes the FCC-hh physics discovery opportunities, presents the FCC-hh accelerator design, performance reach, and staged operation plan, discusses the underlying technologies, the civil engineering and technical infrastructure, and also sketches a possible implementation. Combining ingredients from the Large Hadron Collider (LHC), the high-luminosity LHC upgrade and adding novel technologies and approaches, the FCC-hh design aims at significantly extending the energy frontier to 100 TeV. Its unprecedented centre-of-mass collision energy will make the FCC-hh a unique instrument to explore physics beyond the Standard Model, offering great direct sensitivity to new physics and discoveries.

Upgrade

10.1140/epjst/e2019-900088-6

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Heavy Quarkonium Physics

OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (2005)

Nora Brambilla Michael Krämer R. Mussa Antonio Vairo Gunnar Bali

This report is the result of the collaboration and research effort of the Quarkonium Working Group over the last three years. It provides a comprehensive overview of the state of the art in heavy-quarkonium theory and experiment, covering quarkonium spectroscopy, decay, and production, the determination of QCD parameters from quarkonium observables, quarkonia in media, and the effects on quarkonia of physics beyond the Standard Model. An introduction to common theoretical and experimental tools is included. Future opportunities for research in quarkonium physics are also discussed.

10.5170/cern-2005-005

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High-precision Luminosity at $e^+ e^-$ Colliders: Theory Status and Challenges

Acta Physica Polonica B (2015)

C. M. Carloni Calame G. Montagna O. Nicrosini F. Piccinini

This is a brief review of the theoretical status of Higgs production at the LHC in the Standard Model, with an emphasis on the recent developments and computations.In particular, I focus on both inclusive and differential cross sections for the dominant production mode in the Standard Model, where the theoretical uncertainties induced by the different interplays between top-and bottom-quark effects in the gluon-fusion scattering amplitude are discussed.

Electron–positron annihilation

10.5506/aphyspolb.46.2227

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Searches for new physics

Gian F. Giudice W. Majerotto A. Trombini D. Dominici S. Asai

Source

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Interim report for the International Muon Collider Collaboration (IMCC)

OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (2024)

C. Accettura Simon B. Adrian Rohit Agarwal C. Ahdida C. Aimè

Interim

Muon collider

10.23731/cyrm-2024-002

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First look at the physics case of TLEP

Journal of High Energy Physics (2014)

Mustafa Biçer H. Duran Yıldız İlker Yıldız G. Coignet M. Delmastro

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 t-tbar 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.

ATLAS experiment

10.1007/jhep01(2014)164

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Erratum to: Muon-electron scattering at NLO

Journal of High Energy Physics (2022)

Massimo Alacevich C. M. Carloni Calame Mauro Chiesa G. Montagna O. Nicrosini

We became aware of a misrepresentation of the differential cross sections in the upper panels of figure 4 of the original paper.Namely, the vertical scale of the plots is wrong by a factor of π/180 × 1000 17.4533.The corrected graphs are shown in the figure below for completeness, which replaces Fig. 4 of the paper.The rest of the plots in the paper and the conclusions remain unchanged.

10.1007/jhep02(2022)201

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Measuring the leading hadronic contribution to the muon g-2 via the -e elastic scattering.

EPJ Web of Conferences (2018)

U. Marconi F. Piccinini

The precision measurement of the anomalous magnetic moment g-2 of the muon presently exhibits a 3.5 σ deviation between theory and experiments. In the next few years the anomalous magnetic moment will be measured to higher precisions at Fermilab and J-PARC. The theoretical prediction can be improved by reducing the uncertainty on the leading hadronic correction HLO μ to the g-2. Here we present a novel approach to determine a HLO μ with space-like data, by means of precise measurement of the hadronic shift of the effective electromagnetic coupling α exploiting the elastic scattering of 150 GeV muons (currently available at CERN North area) on atomic electrons of a low-Z target. The direct measurement of a HLO μ in the space-like region will provide a new independent determination competitive with the time-like dispersive approach, and will consolidate the theoretical prediction of the muon g-2 in the Standard Model. It will allow therefore a firmer interpretation of the measurements of the future muon g-2 experiments at Fermilab and J-PARC

Fermilab

10.1051/epjconf/201817901012

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Promising Technologies and R&D Directions for the Future Muon Collider Detectors

HAL (Le Centre pour la Communication Scientifique Directe) (2022)

S. Jindariani F. Meloni C. Aimè N. Bartosik E. Barzi

Muon collider

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