0 GRAPE – Dilepton ( Version 1 . 1 ) A Generator for Dilepton Production in ep Collisions Tetsuo Abe
نویسنده
چکیده
GRAPE-Dilepton is a Monte Carlo event generator for dilepton production in ep collisions. The cross-section calculation is based on the exact matrix elements in the electroweak theory at tree level. The dilepton productions via γγ, γZ, ZZ collisions and via photon internal conversion are taken into account. In addition, the effects of the Z on/offshell production are also included. The relevant Feynman amplitudes are generated by the automatic calculation system GRACE. The calculation of the proton vertex covers the whole kinematical region. This generator has an interface to PYTHIA and SOPHIA to obtain complete hadronic final states.
منابع مشابه
00 12 02 9 v 2 5 D ec 2 00 0 GRAPE – Dilepton ( Version 1 . 1 ) A Generator for Dilepton Production in ep Collisions
GRAPE-Dilepton is a Monte Carlo event generator for dilepton production in ep collisions. The cross-section calculation is based on the exact matrix elements in the electroweak theory at tree level. The dilepton productions via γγ, γZ, ZZ collisions and via photon internal conversion are taken into account. In addition, the effects of the Z on/offshell production are also included. The relevant...
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GRAPE-Dilepton is a Monte Carlo event generator for dilep-ton production in ep collisions. The cross-section calculation is based on the exact matrix elements in the electroweak theory at tree level. The dilepton productions via , Z 0 , Z 0 Z 0 collisions and via photon internal conversion are taken into account. In addition, the eeects of the Z 0 on/oo-shell production are also included. The r...
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متن کاملComment on "Transverse-mass Mperp dependence of dilepton emission from preequilibrium and quark-gluon plasma in high energy nucleus-nucleus collisions"
In a recent Letter [1], Geiger presents calculations of the dilepton emission from the early stage of ultrarelativistic heavy ion collisions using the parton cascade model (PCM). He shows that the M ⊥ scaling [2] found in Ref. [3] is not observed. In this Comment, we point out that this is largely due to a defect in the PCM. The PCM is based on the perturbative QCD and inevitably contains two i...
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Dilepton production associated with minijets is calculated in ultrarela-tivistic heavy ion collisions using the first order approximation of the dilepton fragmentation functions of quarks and gluons. The full QCD evolution of the fragmentation functions is also studied. We find that the dilepton pairs from the fragmentation of minijets are comparable to direct Drell-Yan at √ s = 200 AGeV for sm...
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تاریخ انتشار 1998