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Recent Developments in IR-Improved Amplitude-Based Resummation in Precision High Energy Collider Physics
B. F. L. Ward, S. Jadach, W. Placzek +4
We present recent developments in precision high energy collider physics based on the IR-improvement of unintegrable singularities in the infrared regime via amplitude-based resumm…
Amplitude-Based IR-Improvement in Precision LHCFCC Physics
B. F. L. Ward, S. Jadach, W. Placzek +3
We present recent results based on the IR-improvement of unintegrable singularities in the infrared regime via amplitude-based resummation in $QED \times QCD \subset SU(2)_L \times…
KKMCee: Multi-photon MC for lepton and quark pair production at lepton colliders
Scott A. Yost, Stanisław Jadach, B. F. L. Ward +2
We present an overview of the Monte Carlo event generator KKMCee for lepton and quark pair production in the high energy electron-positron annihilation process. We note that it is…
Collinearly Enhanced YFS MC Approach to Precision High Energy Collider Physics
B. F. L. Ward, S. Jadach, Z. Was
We improve the YFS IR resummation theory so that it includes all of the attendant collinear contributions which exponentiate. The attendant new resummed contributions are shown to…
Outlook for the Theoretical Precision of the Luminosity at Future Lepton Colliders
B. F. L. Ward, S. Jadach, W. Placzek +2
The LEP precision physics requirements on the theoretical precision tag for the respective luminosity were () at , where the former (latter) LEP result has…
Collinearly Enhanced Realizations of the YFS MC Approach to Precision Resummation Theory
S. Jadach, B. F. L. Ward, Z. A. Was
We extend the YFS IR resummation theory to include all of the attendant collinear contributions which exponentiate. This improves the original YFS formulation in which only a part…
KKMChh: matching CEEX photonic ISR to a QED-corrected parton shower
S. A. Yost, S. Jadach, B. F. L. Ward +1
KKMChh adapts the CEEX (Coherent Exclusive Exponentiation) formalism of the Monte Carlo Program KKMC for Z boson production and decay to hadron scattering. Amplitude-level soft pho…
Overview of theoretical precision of the luminosity at future electron-positron colliders
B. F. L. Ward, S. Jadach, W. Placzek +2
For both the FCC-ee and the ILC, to exploit properly the respective precision physics program, the theoretical precision tag on the respective luminosity will need to be improved f…
Initial state QED radiation aspects for future colliders
S. Frixione, E. Laenen, C. M. Carloni Calame +25
This white paper concerns theoretical and phenomenological aspects relevant to the physics of future colliders, in particular regarding initial-state QED radiation. The co…
Multi-photon Monte Carlo event generator KKMCee for lepton and quark pair production in lepton colliders
S. Jadach, B. F. L. Ward, Z. Was +2
We present the {\tt KKMCee 5.00.2} Monte Carlo event generator for lepton and quark pair production for the high energy electron-positron annihilation process. It is still the most…
Mini-Proceedings of the STRONG2020 Virtual Workshop on "Space-like and Time-like determination of the Hadronic Leading Order contribution to the Muon "
G. Abbiendi, A. Arbuzov, Sw. Banerjee +31
The mini-proceedings of the STRONG2020 Virtual Workshop "Space-like and Time-like determination of the Hadronic Leading Order contribution to the Muon ", November 24--26 2021,…
New Developments in KKMChh: Quark-Level Exponentiated Radiative Corrections and Semi-analytical Results
S. A. Yost, M. Dittrich, S. Jadach +2
We describe a new semi-analytical program, KKhhFoam, which provides a simplified framework for testing the amplitude-level exponentiation scheme (CEEX) of the full KKMChh program i…
IR-Improved Amplitude-Based Resummation in Quantum Field Theory: New Results and New Issues
B. F. L. Ward, S. Jadach, W. Placzek +3
With the advancement of strategies for the precision physics programs for the HL-LHC, FCC-ee, FCC-hh, ILC, CLIC, CEPC, and CPPC, the need for proper control of the attendant theore…
Theory requirements for SM Higgs and EW precision physics at the FCC-ee
Sven Heinemeyer, Stanislaw Jadach, Jürgen Reuter
High precision experimental measurements of the properties of the Higgs boson at 125 GeV as well as electroweak precision observables such as the W -boson mass or the effect…
Overview of the Path to 0.01 Theoretical Luminosity Precision for the FCCee and Its Possible Synergistic Effects for Other FCC Precision Theory Requirements
B. F. L. Ward, S. Jadach, W. Placzek +2
To exploit properly the precision physics program at the FCC-ee, the theoretical precision tag on the respective luminosity will need to be improved from the 0.054 (0.061)…
KKMC-hh for Precision Electroweak Phenomenology at the LHC
Scott A. Yost, Matthew Dittrich, Stanislaw Jadach +2
We describe the program KKMC-hh, which calculates Z boson processes in hadronic collisions using coherent exclusive exponentiation (CEEX) with exact second-order photonic correctio…
The Monte Carlo Program KKMC for the Lepton or Quark Pair Production at LEP/SLC Energies -- updates of electroweak calculations
A. Arbuzov, S. Jadach, Z. Wąs +2
Since the {\tt KKMC} program was published for the first time over 20 years ago, it has gained popularity and was exploited in a broad spectrum of applications. The core part of th…
On the universality of the KRK factorization scheme
S. Jadach
The factorisation scheme (FS) abbreviated as KRK FS including a new definition of the PDFs for initial hadrons was formulated while developing KrkNLO scheme of matching QCD NLO cor…
IFI and ISR Effects for Z/ Drell-Yan Observables using MC-hh
S. Jadach, B. F. L. Ward, S. A. Yost +1
Continuing with our investigations of the expected sizes of multiple photon radiative effects in heavy gauge boson production with decay to charged lepton pairs in the context of t…
Role of IR-Improvement in Precision LHC/FCC Physics and in Quantum Gravity
B. F. L. Ward, S. Jadach, W. Placzek +3
IR-improvement based on amplitude-level resummation allows one to control unintegrable results in quantum field theory with arbitrary precision in principle. We illustrate such res…
Improved Bhabha cross section at LEP and the number of light neutrino species
Patrick Janot, Stanisław Jadach
In collisions, the integrated luminosity is generally measured from the rate of low-angle Bhabha interactions . In the published LEP res…
Theory challenges at future lepton colliders
Stanisław Jadach, Maciej Skrzypek
High energy, high luminosity, future lepton colliders, circular or linear, may possibly give us hint about fundamental laws of Nature governing at very short distances and very sho…
Precision measurement of the Z boson to electron neutrino coupling at the future circular colliders
R. Aleksan, S. Jadach
At the high luminosity electron-positron circular colliders like FCC-ee in CERN and CEPC in China it will possible to measure very precisely process with subsequent…
QED Exponentiation for quasi-stable charged particles: the process
S. Jadach, W. Płaczek, M. Skrzypek
All real and virtual infrared singularities in the standard analysis of the perturbative Quantum Electrodynamics (like that of Yennie-Frautschi-Suura) are associated with photon em…