The Lamb shift contribution of very light millicharged particles

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dc.creatorGluck, M.
dc.creatorRakshit, S.
dc.creatorReya, E.
dc.date2007-03-13
dc.date2007-09-03
dc.date.accessioned2026-07-07T11:22:48Z
dc.date.available2026-07-07T11:22:48Z
dc.descriptionThe leading order vacuum polarization contribution of very light millicharged fermions and scalar (spin-0) particles with charge εe and mass μto the Lamb shift of the hydrogen atom is shown to imply universal, i.e. μ-independent, upper bounds on ε: ε\lsim 10^{-4} for μ\lsim 1 keV in the case of fermions, and for scalars this bound is increased by a factor of 2. This is in contrast to expectations based on the commonly used approximation to the Uehling potential relevant only for conventionally large fermion (and scalar) masses.
dc.description10 pages including 3 figures, version to appear in Physical Review D (Rapid Communications)
dc.identifierhttps://arxiv.org/abs/hep-ph/0703140
dc.identifierhttp://arxiv.org/abs/hep-ph/0703140
dc.identifierPhys.Rev.D76:091701,2007
dc.identifierdoi:10.1103/PhysRevD.76.091701
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/194696
dc.subjectHigh Energy Physics - Phenomenology
dc.titleThe Lamb shift contribution of very light millicharged particles
dc.typetext

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