86 Works

Inclusion of mixed QCD–QED resummation effects at higher orders

G.F.R. Sborlini
In this section, we review some recent results concerning the inclusion of mixed QCD–QED corrections in the computation of physical observables. First, we comment on the extension of the Dokshitzer–Gribov–Lipatov–Altarelli–Parisi (DGLAP) equations to deal with the presence of mixed QCD–QED interactions. We describe the calculation of the full set of higher-order corrections to the splitting kernels, through the Abelianization algorithm. This procedure al- lows us to build the functional form of the QCD–QED corrections, starting...

Precision quantum chromodynamics

D. D’Enterria
The unprecedentedly small experimental uncertainties expected in the electron–positron mea- surements at the FCC-ee, key to searches for physics beyond the SM up to Λ ≈ 50 TeV, impose precise calculations for the corresponding theoretical observables. At the level of theoretical pre- cision required to match that of the FCC-ee experimental measurements, the current relevant QCD uncertainties have to be reduced at at least four different levels.

Scalar one-loop Feynman integrals in arbitrary space–time dimension d – an update

T. Riemann & J. Usovitsch
No abstract.

Chapter 4: Heavy Ions at the Future Circular Collider

A. Dainese Et Al.
The Future Circular Collider (FCC) Study is aimed at assessing the physics potential and the technical feasibility of a new collider with centre-of-mass energies, in the hadron–hadron collision mode, seven times larger than the nominal LHC energies. Operating such machine with heavy ions is an option that is being considered in the accelerator design studies. It would provide, for example, Pb–Pb and p–Pb collisions at √sNN = 39 and 63 TeV, respectively, per nucleon–nucleon collision,...

Chapter 2: Higgs and EW Symmetry Breaking Studies

R. Contino Et Al.
This Chapter summarises the physics opportunities for the study of Higgs bosons and the dynamics of electroweak symmetry breaking at the 100 TeV pp collider.

Standard Model physics at the HL-LHC and HE-LHC

Editors: P. Azzi, S. Farry, P. Nason & A. Tricoli
The successful operation of the Large Hadron Collider (LHC) and the excellent performance of the ATLAS, CMS, LHCb and ALICE detectors in Run-1 and Run-2 with $pp$ collisions at center-of-mass energies of 7, 8 and 13 TeV as well as the giant leap in precision calculations and modeling of fundamental interactions at hadron colliders have allowed an extraordinary breadth of physics studies including precision measurements of a variety physics processes. The LHC results have so...

Electron–positron annihilation processes in MCSANCee

A. Arbuzov, S. Bondarenko, Y. Dydyshka, L. Kalinovskaya, L. Rumyantsev, R. Sadykov & V. Yermolchyk
No abstract.

Effective field theory approach to QED corrections in flavour physics

M. Beneke, C. Bobeth & R. Szafron
Thanks to the accurate measurements performed at the low-energy facilities and the LHC, flavour physics of light quarks, especially the bottom quark, emerged on the precision frontier for tests of the Standard Model (SM) and in searches for new physics effects. On the theoretical side, short-distance perturbative higher-order QCD and electroweak corrections are under good control for many processes. Moreover, tremendous progress in lattice computations allows percentage to even subpercentage accuracy to be achieved for...

Numerics for elliptic Feynman integrals

C. Bogner, I. Hönemann, K. Tempest, A. Schweitzer & S. Weinzierl
The Standard Model involves several heavy particles: the Z and W bosons, the Higgs boson, and the top quark. Precision studies of these particles require, on the theoretical side, quantum corrections at the two-loop order and beyond. It is a well-known fact that, starting from two loops, Feynman integrals with massive particles can no longer be expressed in terms of multiple polylogarithms. This immediately raises the following question. What is the larger class of functions...

Prospects for higher-order corrections to W pair production near threshold in the EFT approach

C. Schwinn
The precise measurement of the mass of the W boson plays an essential role for precision tests of the Standard Model (SM) and indirect searches for new physics through global fits to electroweak observables. Cross-section measurements near the W pair production threshold at a possible future e−e+ collider promise to reduce the experimental uncertainty to the level of 3 MeV at an International Linear Collider (ILC), while a high-luminosity circular collider offers a potential improvement...

Vertex functions in QCD—preparation for beyond two loops

J.A. Gracey
We summarise the algorithm to determine the two-loop off-shell three-point vertex functions of QCD before outlining the steps required to extend the results to three and more loops.

Higgs boson decays: theoretical status

M. Spira
No abstract.

Contents

No abstract.

Power supplies

J.-F. Bouteille & D. Einfeld
No abstract.

Layout of a synchrotron light source

D. Einfeld
No abstract.

Injector

D. Einfeld
No abstract.

Chapter 5: Physics Opportunities with the FCC-hh Injectors

B. Goddard Et Al.
In this chapter we explore a few examples of physics opportunities using the existing chain of accelerators at CERN, including potential upgrades. In this context the LHC ring is also considered as a part of the injector system. The objective is to find examples that constitute sensitive probes of New Physics that ideally cannot be done elsewhere or can be done significantly better at the CERN accelerator complex. Some of these physics opportunities may require...

Synchrotron radiation

Ch. Quitmann & T. Rayment
No abstract.

CERN Yellow Reports: Monographs, Vol 4 (2017): High-Luminosity Large Hadron Collider (HL-LHC) Technical Design Report V. 0.1

edited by Apollinari G., Béjar Alonso I. (Executive Editor), Brüning O., Fessia P., Lamont M., Rossi L., Tavian L. CERN-2017-007-M, ISBN 978-92-9083-470-0 (paperback), ISBN 978-9083-471-7 (PDF)

SMEFT

S.D. Bakshi, J. Chakrabortty & S.K. Patra
In spite of the non-observation of any new resonances after the discovery of the Standard Model (SM) Higgs-like particle, which announces the success of the SM, we have enough reason to believe the existence of theories beyond it (BSM), with the SM as a part. As any such theory will affect the electroweak and the Higgs sector, and the sensitivity of these precision observables is bound to increase in the near future, indirect estimation of...

Global electroweak fit in the FCC-ee era

J. Erler & M. Schott
The top quark and Higgs boson masses have been predicted before their respective discoveries by the global fit of the Standard Model to electroweak precision data. With the Higgs boson discovery and the measurement of its mass, the last missing parameter of the Standard Model has been fixed and thus the internal consistency of the Standard Model can be probed at a new level by comparing direct measurements with the indirect predictions of the global...

CERN Yellow Reports: Monographs, Vol 2 (2018): The Compact Linear e+e− Collider (CLIC) : 2018 Summary Report

Corresponding editors: Philip N. Burrows (University of Oxford), Nuria Catalan Lasheras (CERN), Lucie Linssen (CERN), Marko Petrič (CERN), Aidan Robson (University of Glasgow), Daniel Schulte (CERN), Eva Sicking (CERN), Steinar Stapnes (CERN) Abstract: The Compact Linear Collider (CLIC) is a TeV-scale high-luminosity linear e+e− collider under development at CERN. Following the CLIC conceptual design published in 2012, this report provides an overview of the CLIC project, its current status, and future developments. It presents the...

NNLO corrections in four dimensions

R. Pittau
Currently, four-dimensional techniques applied to higher-order calculations are under active investigation. The main motivation for this is the need to simplify perturbative calculations necessary to cope with the precision requirements of the future LHC and FCC experiments. In this contribution, I review the four-dimensional regularisation or renormalization (FDR) approach to the computation of NNLO corrections in four dimensions. In particular, I describe how fully inclusive NNLO final-state quark-pair corrections are computed in FDR by directly...

Perspectives of heavy quarkonium production at the FCC-ee

Z.-G. He & B.A. Kniehl
We review heavy quarkonium production, concentrating on the J/ψ case, by these two processes in Sections 8.1 and 8.2, respectively, and discuss the prospects of heavy quarkonium production at the FCC-ee beyond the current measurements made at B factories and CERN LEP-II. Section 8.3 contains a summary and an outlook.

e+e− → γγ at large angles for FCC-ee luminometry

C.M. Carloni, M. Chiesa, G. Montagna, O. Nicrosini & F. Piccinini
We examine large-angle two-photon production in e+e− annihilation as a possible process to monitor the luminosity of the FCC-ee. We review the current status of the theoretical pre- dictions and perform an exploratory phenomenological study of the next-to-leading and higher- order QED corrections using the Monte Carlo event generator BabaYaga@NLO. We also con- sider the one-loop weak corrections, which are necessary to meet the high-precision requirements of the FCC-ee. Possible ways to approach the target...

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