2018 Impact factor 4.843
Particles and Fields
Eur. Phys. J. C 13, 459-470
DOI 10.1007/s100520000248

Can the trilinear Higgs self-coupling be measured
at future linear colliders?

D.J. Miller - S. Moretti

Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, UK

Received: 20 September 1999 / Published online: 6 March 2000 - © Springer-Verlag 2000

Abstract
We assess the possibility of measuring the trilinear self-coupling of the Standard Model Higgs boson at future electron-positron linear colliders with centre-of-mass energies between 500 and 1500 GeV. We consider rather light Higgs scalars, with mass below the W+W- threshold, produced in the double Higgs-strahlung channel $e^+e^-\to HHZ$ and decaying via the dominant mode $H\rightarrow b\bar b$. Assuming ideal vertex tagging of the heavy-quark jets and mass reconstruction of the Z boson produced in association with the Higgs pair, we compare the yield of the above process to those of all irreducible electroweak and strong backgrounds proceeding through a $b\bar bb\bar b Z$ intermediate state. Total cross sections and differential spectra of phenomenological relevance to the selection and analysis of the signal are given and discussed.


Copyright Società Italiana di Fisica, Springer-Verlag 2000