Scattering of charged particles off monopole–anti-monopole pairs

Abstract

The Large Hadron Collider is reaching energies never achieved before allowing the search for exotic particles in the TeV mass range. In a continuing effort to find monopoles we discuss the effect of the magnetic dipole field created by a pair of monopole-antimonopole or monopolium on the successive bunches of charged particles in the beam at LHC.

Looking for monopolium excited states with electromagnetic detectors

“…With the present parameters the latter have energies energies of KeV while the former of GeV. Lastly, another way to see these monopolium states would be by the deformation of the proton beam [19] after having seen a jump in the coil detector.…”

“…Our subject of study is a particle which has a permanent or an induced magnetic dipole moment − → M. We call this particle dipole for short. Assuming the size of the particle small compared with the distance at which we are measuring the magnetic field its dipole moment will produce a magnetic field [19]…”

“…Much experimental research has been carried out into the search for monopoles [14][15][16][17][18]. However, our interest here lies in the detection of monopolium, who is charge-less but which has a magnetic moment in the presence of magnetic fields or in excited deformed states [13,19]. This is a phenomenologically oriented theoretical investigation and therefore the study of the behavior of monopolium in the presence of coils serves to determine interesting properties and energy regimes of excited monopolia which may serve to guide more sophisticated experiments given the progress of electromagnetic technologies at present.…”

MoEDAL physics results and future plans

“…Monopolium is a neutral state, hence it is difficult to detect directly at a collider detector, although its decay into two photons would give a rather clear signal for the ATLAS and CMS detectors [38,39], which however would not be visible in the MoEDAL detector. Other studies [40,41] propose to exploit the scattering of charged particles off monopole-antimonopole pairs. Such techniques would be appealing for detecting monopolia at the LHC.…”

An effective field theory approach to monopolium

“…Whereas it is often suggested that an idea as elegant as a theory of monopoles should occur in nature, the lack of experimental evidence might suggest that monopoles will simply not manifest themselves in their trivial free form. Instead, they might very well be confined into a monopole-antimonopole bound state (so-called "monopolium") by their strong magnetic forces [1,[10][11][12][13][14][15][16][17][18]. Since this proposal by Dirac, the concept of monopolium has been largely explored in several contexts.…”