Optical dispersion of composite particles consisting of millicharged constituents (English)

Paper

In: Journal of Physics G: Nuclear and Particle Physics   ;  43 ,  8  ;  085002  ;  2016
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Composite dark matter (DM) comprised of electrically charged constituents can interact with the electromagnetic field via the particle's dipole moment. This interaction results in a dispersive optical index of refraction for the DM medium. We compute this refractive index for atomic DM and more strongly bound systems, modeled via a harmonic oscillator potential. The dispersive nature of the index will result in a time lag between high and low energy photons simultaneously emitted from a distant astrophysical observable. This time lag, due to matter dispersion, could confound potential claims of Lorentz invariance violation (LIV) which can also result in such time lags. We compare the relative size of the two effects and determine that the dispersion due to DM is dwarfed by potential LIV effects for energies below the Planck scale.

Table of contents – Volume 43, Issue 8

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084001
Letter of intent for KM3NeT 2.0
S Adrián-Martínez / M Ageron / F Aharonian / S Aiello / A Albert / F Ameli / E Anassontzis / M Andre / G Androulakis / M Anghinolfi et al. | 2016
084002
Shape coexistence at low spin in the Z = 50 region and its spectroscopic signatures
P E Garrett | 2016
085001
Tagging b quarks at extreme energies without tracks
B Todd Huffman / Charles Jackson / Jeff Tseng | 2016
085002
Optical dispersion of composite particles consisting of millicharged constituents
Audrey K Kvam / David C Latimer | 2016
085101
Spin–orbit coupling rule in bound fermion systems
J-P Ebran / E Khan / A Mutschler / D Vretenar | 2016
085102
Fluctuations in charged particle multiplicities in relativistic heavy-ion collisions
Maitreyee Mukherjee / Sumit Basu / Subikash Choudhury / Tapan K Nayak | 2016
085103
Continuum discretised BCS approach for weakly bound nuclei
J A Lay / C E Alonso / L Fortunato / A Vitturi | 2016
085104
Electromagnetic selection rules in the triangular α-cluster model of 12C
G Stellin / L Fortunato / A Vitturi | 2016
085201
Double electron capture searches in 74Se
B Lehnert / T Wester / D Degering / D Sommer / L Wagner / K Zuber | 2016