Zobrazeno 81 - 90
of 550
pro vyhledávání: '"Zeppenfeld, D."'
Autor:
Zeppenfeld, D.
The search for new phenomena at hadron colliders requires a good understanding of QCD processes. The analysis of multi-jet signatures in the top quark search at the Tevatron is one example, forward jet-tagging and rapidity gap techniques in the analy
Externí odkaz:
http://arxiv.org/abs/hep-ph/9603315
Autor:
Gounaris, G., Kneur, J. -L., Zeppenfeld, D., Ajaltouni, Z., Arhrib, A., Bella, G., Berends, F., Bilenky, M., Blondel, A., Busenitz, J., Charlton, Choudhury, D, Clarke, P., Conboy, J. E., Diehl, M., Fassouliotis, D., Frère, J. -M., Georgiopoulos, C., Gibbs, M., Grünewald, M., Hansen, J. B., Hartmann, C., Jin, B. N., Jousset, J., Kalinowski, J., Kocian, M., Lahanas, A., Layssac, J., Lieb, E., Markou, C., Matteuzzi, C., Mättig, P., Moreno, J. M., Moultaka, G., Nippe, A., Orloff, J., Papadopoulos, C. G., Paschalis, J., Petridou, C., Phillips, H., Podlyski, F., Pohl, M., Renard, F. M., Rossignol, J. -M., Rylko, R., Sekulin, R. L., van Sighem, A., Simopoulou, E., Skillman, A., Spanos, V., Tonazzo, A., Tytgat, M., Tzamarias, S., Verzegnassi, C., Vlachos, N. D., Zevgolatakos, E.
We present the results obtained by the "Triple Gauge Couplings" working group during the LEP2 Workshop (1994-1995). The report concentrates on the measurement of $WW\gamma$ and $WWZ$ couplings in $e^-e^+\to W^-W^+$ or, more generally, four-fermion pr
Externí odkaz:
http://arxiv.org/abs/hep-ph/9601233
Autor:
Zeppenfeld, D.
A direct measurement of the trilinear $WW\gamma$ and $WWZ$ couplings is possible in the pair production of electroweak bosons at $e^+e^-$ and hadron colliders. This talk addresses some of the theoretical issues: the parameterization of ``anomalous co
Externí odkaz:
http://arxiv.org/abs/hep-ph/9506239
Autor:
Aihara, H., Barklow, T., Baur, U., Busenitz, J., Errede, S., Fuess, T. A., Han, T., London, D., Ohnemus, J., Szalapski, R., Wendt, C., Zeppenfeld, D.
We discuss the direct measurement of the trilinear vector boson couplings in present and future collider experiments. The major goals of such experiments will be the confirmation of the Standard Model (SM) predictions and the search for signals of ne
Externí odkaz:
http://arxiv.org/abs/hep-ph/9503425
Autor:
Baur, U., Zeppenfeld, D.
Publikováno v:
Phys.Rev.Lett. 75 (1995) 1002-1005
The naive implementation of finite width effects in processes involving unstable particles can violate gauge invariance. For the example of radiative $W$ production and decay, $q\bar q' \to \ell\nu\gamma$, at tree level, it is demonstrated how gauge
Externí odkaz:
http://arxiv.org/abs/hep-ph/9503344
Publikováno v:
Phys.Lett.B346:106-114,1995
The distinct color flow of the $qq\to qqH,\; H\to W^+W^-$ process leads to suppressed radiation of soft gluons in the central region, a feature which is not shared by major background processes like $t\bar t$ production or $q\bar q \to W^+W^-$. For t
Externí odkaz:
http://arxiv.org/abs/hep-ph/9412276
Autor:
Martin, A. D., Zeppenfeld, D.
Publikováno v:
Phys.Lett. B345 (1995) 558-563
We critically examine the evaluation of the hadronic contribution to the running of the QED coupling, $\alpha$, from $Q^2=0$ to $Q^2=M_Z^2$. Using data for $e^+e^-\to{}$hadrons we find that $\alpha(M_Z^2)^{-1} = 128.99\pm 0.06$, as compared to the ex
Externí odkaz:
http://arxiv.org/abs/hep-ph/9411377
Autor:
Zeppenfeld, D.
Color singlet two gluon exchange provides a perturbative model for the pomeron. This mechanism is thought to explain the production of rapidity gaps in hard dijet events at the Tevatron. It is shown that in $qQ$ scattering via two gluon color singlet
Externí odkaz:
http://arxiv.org/abs/hep-ph/9409205
Autor:
Chehime, H. N., Zeppenfeld, D.
The $t$-channel exchange of two gluons in a color singlet state represents the lowest order approximation to the Pomeron. This exchange mechanism is thought to also explain the formation of rapidity gaps in dijet events at the Tevatron. At the pertur
Externí odkaz:
http://arxiv.org/abs/hep-ph/9401244
Autor:
Duff, A., Zeppenfeld, D.
Publikováno v:
Phys.Rev. D50 (1994) 3204-3217
We consider the real emission QCD correction to heavy Higgs boson production via weak boson fusion in high energy $pp$ collisions. The ${\cal O}(\alpha_s)$ corrections are determined for the complete electroweak $q q \rightarrow q q W^+ W^-$ process.
Externí odkaz:
http://arxiv.org/abs/hep-ph/9312357