ISSN:
1434-6052
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Physik
Notizen:
Abstract. We assess the potential of future electron-positron linear colliders operating in the $e^\pm\gamma$ mode in detecting charged Higgs bosons with mass around and larger than the top quark mass, using Compton back-scattered photons from laser light. We compare the pair production mode, $e^-\gamma\to e^- H^+H^-$ , to a variety of channels involving only one charged Higgs scalar in the final state, such as the tree-level processes $e^-\gamma\to \nu_e H^- \Phi^0 $ ( $\Phi^0=h^0,H^0$ and $A^0$ ) and $e^-\gamma\to \nu_e f\bar f H^-$ ( $f=b,\tau$ and $\nu_\tau$ ) as well as the loop-induced channel $e^-\gamma\to \nu_e H^-$ . We show that, when the charged Higgs boson mass is smaller than or comparable to half the collider energy, $\sqrt s_{ee}\gtrsim 2M_{H^\pm}$ , single production cross sections are of the same size as the pair production rate, whereas, for charged Higgs boson masses larger than $\sqrt s_{ee}/2$ , all processes are heavily suppressed. In general, production cross sections of charged Higgs bosons via $e^\pm\gamma$ scatterings are smaller than those induced at an $e^+e^-$ collider and the latter represents a better option to produce and analyse such particles.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/s100520100828
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