TL;DR
This paper explores how dilatonic effects near naked singularities in 4D Brans-Dicke theory influence the interaction with massive particles, revealing conditions where communication with the singularity is impossible.
Contribution
It identifies the impact of dilatonic effects on particle interactions near naked singularities and examines Kaluza-Klein gravity as a special case.
Findings
Dilatonic effects can shield or anti-shield naked singularities from massive particles.
Certain parameter ranges prevent communication between singularity and distant observers.
Kaluza-Klein gravity exhibits similar dilatonic effects near singularities.
Abstract
Static spherically symmetric solutions of 4d Brans-Dicke theory include a set of naked singularity solutions. Dilatonic effects near the naked singularities result in either a shielding or an antishielding effect from intruding massive test particles. One result is that for a portion of the solution parameter space, no communication between the singularity and a distant observer is possible via massive particle exchanges. Kaluza-Klein gravity is considered as a special case.
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