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
Keyword(s):  
High Energy ◽  
Collider Physics ◽  
High Energy Collider

scholarly journals High energy collider physics. Final report

1997 ◽  
Author(s):  
R.C. Ruchti ◽  
N.N. Biswas ◽  
M.R. Wayne
Keyword(s):  
High Energy ◽  
Final Report ◽  
Collider Physics ◽  
High Energy Collider

scholarly journals Matching N3LO QCD calculations to parton showers

2021 ◽  
Vol 2021 (11) ◽  
Author(s):  
Stefan Prestel
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
High Energy ◽  
Event Generator ◽  
Collider Physics ◽  
Third Order ◽  
Lepton Colliders ◽  
Fixed Order ◽  
High Energy Collider ◽  
New Interactions

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.

scholarly journals NEW RESULTS ON PRECISION STUDIES OF HEAVY VECTOR BOSON PHYSICS

2005 ◽  
Vol 20 (15) ◽  
pp. 3258-3262 ◽  
Author(s):  
B. F. L. WARD ◽  
C. GLOSSER ◽  
S. JADACH ◽  
W. PLACZEK ◽  
M. SKRZYPEK ◽  
...  
Keyword(s):  
Electric Charge ◽  
Z Boson ◽  
Vector Boson ◽  
High Energy ◽  
Photon Radiation ◽  
Boson Production ◽  
Collider Physics ◽  
Radiative Return ◽  
High Energy Collider ◽  
Return Process

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.

INELASTIC PHOTOPRODUCTION OF W-BOSON

1998 ◽  
Vol 13 (25) ◽  
pp. 2013-2020
Author(s):  
S. M. KHAIRUL ALAM ◽  
A. M. HARUN AR RASHID
Keyword(s):  
Differential Cross Section ◽  
Cross Section ◽  
W Boson ◽  
Electric Quadrupole ◽  
Parton Model ◽  
High Energy ◽  
Electric Quadrupole Moment ◽  
Photoproduction Process ◽  
Quark Parton Model ◽  
High Energy Collider

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.

scholarly journals ColliderBit: a GAMBIT module for the calculation of high-energy collider observables and likelihoods

2017 ◽  
Vol 77 (11) ◽  
Author(s):  
Csaba Balázs ◽  
◽  
Andy Buckley ◽  
Lars A. Dal ◽  
Ben Farmer ◽  
...  
Keyword(s):  
High Energy ◽  
High Energy Collider

ANALYTIC EXPRESSIONS OF CROSS SECTIONS, ASYMMETRIES AND W DENSITY MATRICES FOR e+e− → W+W− WITH GENERAL THREE-BOSON COUPLINGS

1993 ◽  
Vol 08 (19) ◽  
pp. 3285-3320 ◽  
Author(s):  
G. GOUNARIS ◽  
J. LAYSSAC ◽  
G. MOULTAKA ◽  
F. M. RENARD
Keyword(s):  
Cross Sections ◽  
High Energy ◽  
Spin Density Matrix ◽  
Matrix Elements ◽  
Density Matrices ◽  
Independent Analysis ◽  
Analytic Expressions ◽  
Complete Set ◽  
Model Independent ◽  
High Energy Collider

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.

scholarly journals A PROBLEM IN VIRTUAL GRAVITON EXCHANGES IN FLAT LARGE EXTRA DIMENSIONS

2010 ◽  
Vol 25 (23) ◽  
pp. 4511-4523
Author(s):  
HARUKA NAMATAME
Keyword(s):  
Cross Sections ◽  
Extra Dimensions ◽  
Large Extra Dimensions ◽  
High Energy ◽  
Momentum Conservation ◽  
More Care ◽  
High Energy Collider ◽  
The Cross ◽  
Shell Production ◽  
Kaluza Klein

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.

scholarly journals HECATE

2021 ◽  
Vol 81 (6) ◽  
Author(s):  
Marcin Chrząszcz ◽  
Marco Drewes ◽  
Jan Hajer
Keyword(s):  
Civil Engineering ◽  
Hadron Collider ◽  
High Energy ◽  
Next Generation ◽  
Mixing Parameter ◽  
Order Of Magnitude ◽  
High Energy Collider

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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