scholarly journals Virtual Corrections to Bremsstrahlung in High-Energy Collider Physics: LHC and Colliders

2006 ◽  
Vol 157 (1) ◽  
pp. 78-82
Author(s):  
Scott A. Yost ◽  
B.F.L. Ward
1997 ◽  
Author(s):  
R.C. Ruchti ◽  
N.N. Biswas ◽  
M.R. Wayne

2021 ◽  
Vol 2021 (11) ◽  
Author(s):  
Stefan Prestel

Abstract The search for new interactions and particles in high-energy collider physics relies on precise background predictions. This has led to many advances in combining precise fixed-order cross-section calculations with detailed event generator simulations. In recent years, fixed-order qcd calculations of inclusive cross sections at n3lo precision have emerged, followed by an impressive progress at producing differential results. Once differential results become publicly available, it would be prudent to embed these into event generators to allow the community to leverage these advances. This note offers some concrete thoughts on me+ps matching at third order in qcd. As a method for testing these thoughts, a toy calculation of e+e− → u$$ \overline{u} $$ u ¯ at $$ \mathcal{O} $$ O ($$ {\alpha}_s^3 $$ α s 3 ) is constructed, and combined with an event generator through unitary matching. The toy implementation may serve also as blueprint for high-precision qcd predictions at future lepton colliders. As a byproduct of the n3lo matching formula, a new nnlo+ps formula for processes with “additional” jets is obtained.


2005 ◽  
Vol 20 (15) ◽  
pp. 3258-3262 ◽  
Author(s):  
B. F. L. WARD ◽  
C. GLOSSER ◽  
S. JADACH ◽  
W. PLACZEK ◽  
M. SKRZYPEK ◽  
...  

We present new results for two important heavy vector boson physics processes: (1), virtual corrections to hard bremsstrahlung which are relevant to precision predictions for the radiative return process in Z boson production at and beyond LEP2 energies; and, (2), electric charge screening effects in single W production with finite pT, multiple photon radiation in high energy collider physics processes. In both cases we show that we improve the respective precision tag significantly. Phenomenological implications are discussed.


1998 ◽  
Vol 13 (25) ◽  
pp. 2013-2020
Author(s):  
S. M. KHAIRUL ALAM ◽  
A. M. HARUN AR RASHID

We study the WWγ vertex through the process γq→Wq′ where q denotes the quark at a future high energy collider. The differential cross-section for the photoproduction process γq→Wq′ is computed with both anomalous magnetic moment κ and electric quadrupole moment λ for the W-boson. The deep inelastic photoproduction of W± is also calculated in a quark-parton model.


Author(s):  
Csaba Balázs ◽  
◽  
Andy Buckley ◽  
Lars A. Dal ◽  
Ben Farmer ◽  
...  

1993 ◽  
Vol 08 (19) ◽  
pp. 3285-3320 ◽  
Author(s):  
G. GOUNARIS ◽  
J. LAYSSAC ◽  
G. MOULTAKA ◽  
F. M. RENARD

We establish explicit analytic expressions for the e+e− → W+W− cross sections, asymmetries and W± spin density matrix elements in terms of the complete set of anomalous three-boson couplings. This should be useful for performing a model-independent analysis of LEP 2 or future high energy collider data. Sensitivities to the various three-boson couplings are discussed and possible ways to disentangle their effects are proposed.


2010 ◽  
Vol 25 (23) ◽  
pp. 4511-4523
Author(s):  
HARUKA NAMATAME

It is pointed out in a class of models with large extra dimensions that the cross-section of processes with virtual Kaluza–Klein graviton exchanges becomes either much smaller or much larger by many orders of magnitude than what is expected from that of the on-shell production of the Kaluza–Klein gravitons. We demonstrate how the problem arises using a toy model. The cause of this new problem lies in the fact that we do not have momentum conservation in the extra dimensions. To search for the signal of the large extra dimensions with high energy collider experiments, we need more care in interpreting the earlier results on the cross-sections of these processes.


2021 ◽  
Vol 81 (6) ◽  
Author(s):  
Marcin Chrząszcz ◽  
Marco Drewes ◽  
Jan Hajer

AbstractThe next generation of circular high energy collider is expected to be a lepton collider, FCC-ee at CERN or CEPC in China. However, the civil engineering concepts foresee to equip these colliders with bigger detector caverns than one would need for a lepton collider, so that they can be used for a hadron collider that may be installed in the same tunnel without further civil engineering. This opens up the possibility to install extra instrumentation at the cavern walls to search for new long-lived particles at the lepton collider. We use the example of heavy neutral leptons to show that such an installation could improve the sensitivity to the squared mixing parameter by almost half an order of magnitude.


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