16 research outputs found
Radiative corrections in processes at the SSC
We discuss radiative corrections for interactions in the SSC environment.
Based on the theory of Yennie, Frautschi and Suura, we develop appropriate
Monte Carlo event generators to compute the background electromagnetic
radiation. Our results indicate that multiple-photon effects must be taken into
account in the study of SSC physics such as Higgs decay.Comment: UTHEP-92-0901, 15 pages (incl. 3 figures), LaTeX (Talk presented at
the XXXII Cracow School of Theoretical Physics, Zakopane, June 1992
Multiple photon effects in scattering at SSC energies
The Monte Carlo program SSCYFS2 is used in conjunction with available parton
distribution functions to calculate the effects of multiple photon radiation on
pp scattering at SSC energies. Effects relevant to precision SSC physics such
as Higgs discovery and exploration are illustrated.Comment: LaTeX file, uses phyzzx, 7pp + 5 LaTeX figure
Multiple Gluon Effects in at FNAL Energies: Semi-Analytical Results
We apply our Yennie-Frautschi-Suura exponentiated cross section formulas for
the parton processes q + {^(} \bar q {^)}{^\prime} \ra q{^\prime}{^\prime} +
{^(} \bar q {^)}{^\prime}{^\prime}{^\prime} + n(G) to the process q + \bar q
\ra t + \bar t + n(G) at FNAL energies, where G is a QCD gluon. We use
semi-analytical methods to compute the ratio ,
where is our soft gluon YFS exponentiated cross section and
is the Born cross section. For TeV, we get
, respectively, for for example. These results are
not inconsistent with the recent observations by CDF and D0.Comment: 6 pages, latex replaces postscript at archiver's reques
Renormalization Group Improved Exponentiation of Soft Gluons in QCD
We extend the methods of Yennie, Frautschi and Suura to QCD for the summation
of soft gluon effects in which infrared singularities are cancelled to all
orders in . An explicit formula for the respective \rngp improved
exponentiated cross section is obtained for q+\bbar{{q'}}\to q+\bbar{{q'}}+
n(G) at SSC energies. Possible applications are discussed.Comment: 7 pages (1 figure not included, available on request) LATEX,
UTHEP-93-040
Multiple photon effects in fermion-(anti)fermion scattering at SSC energies
We use the theory of Yennie, Frautschi and Suura to realize, via Monte Carlo
methods, the process f\,\bbbarf\to f'\,\bbbarf'+n\gamma at SSC and LHC
energies, where and are quarks or leptons. QED infrared divergences
are canceled to all orders in perturbation theory. The resulting Monte Carlo
event generator, SSC-YFS2, is used to study the effects of initial-state photon
radiation on these processes in the SSC environment. Sample Monte Carlo data
are presented and discussed. We find that the respective multiple-photon
effects must be taken into account in discussing precise predictions for SSC
physics processes.Comment: 14 pages + 8 figures + 1 tabl