出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：One of the most important goals of the International Linear Collider (ILC) experiments is the
detailed study of Higgs particle. With the high-statistics data from devoted efforts by experimentalists,
precise theoretical calculations are mandatory. The full electroweak radiative corrections
require the large scale computation, so that the use of automated system for the perturbative computation
is essential. Most of the radiative corrections for the important channels are already
calculated for ee
ZH[1], νν¯Z[2, 3], eeH[4], t ¯tH[5, 6, 7], ZHH[8, 9]. Here, radiative
corrections to a final 4-body state, ee
νν¯HH, is presented[10]. This channel is important
for the study of Higgs potential in the high energy region. The calculated weak correction in G μ
scheme is small, less than 5% for W 600GeV. In order to confirm the results, we have made
the comparison between ZHH channel and νμν¯μHH channel, and also the estimation of the weak
correction by assuming the dominance ofW W
HH mechanism.
As one of the indispensable tools for the high-energy physics, the development of automated
systems is another important item. Two new features in the GRACE system, the precision control
and the factorization, are introduced. The former works to stabilize the numerical evaluation, and
the latter accelerates the computation of matrix elements.
