AbstractWe discuss the theoretical motivations for new long-range forces induced by spin-1 or spin-0 particles. They would add their effects to those of gravity and lead, because of their composition-dependence, to apparent violations of the Equivalence Principle, possibly at a detectable level. The couplings of a new spin-1 gauge particle, the U boson, are obtained from gauge invariance, taking into account mixing effects with the Z boson. The corresponding charge is expressed as Q5 = xB + yL + zQel and, within grand-unification, is effectively proportional to the number of neutrons N. If the new force has a finite range λ, its effective intensity α is related to this range and to the extra-U(1) symmetry-breaking scale F, by a α 1 2F2 ). Quite surprisingly, particle physics experiments can provide some constraints on such a new force, even if it is extremely weak. In fact, an “equivalence theorem” shows that a very light spin-1 U boson does not in general decouple when its gauge coupling vanishes, but behaves like a quasi-massless pseudoscalar. Particle physics experiments then constrain F to be larger than the electroweak scale.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Theoretical motivations for Equivalence Principle tests


    Beteiligte:
    Fayet, P. (Autor:in)

    Erschienen in:

    Advances in Space Research ; 32 , 7 ; 1289-1296


    Erscheinungsdatum :

    2003-01-01


    Format / Umfang :

    8 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Theoretical Motivations for Equivalence Principle Tests

    Fayet, P. / International Council of Scientific Unions | British Library Conference Proceedings | 2003


    Equivalence principle tests in earth orbit

    Worden, P.W. Jr. | Elsevier | 1977


    Drop Tower Tests of the Equivalence Principle

    Dittus, H. | Online Contents | 2000


    High precision tests of the Equivalence Principle

    Lockerbie, N. A. / Sumner, T. J. / European Space Laboratory | British Library Conference Proceedings | 2005