Colliders and brane vector phenomenology

Abstract

Brane world oscillations manifest themselves as massive vector gauge fields. Their coupling to the standard model is deduced using the method of nonlinear realizations of the spontaneously broken higher dimensional space-time symmetries. Brane vectors are stable and weakly interacting and therefore escape particle detectors unnoticed. LEP and Tevatron data on the production of a single photon in conjunction with missing energy are used to delineate experimentally excluded regions of brane vector parameter space. The additional region of parameter space accessible to the LHC as well as a future lepton linear collider is also determined by means of this process.

Non-Abelian gauge field localization on walls and geometric Higgs mechanism

“…Another and a perhaps more natural option is to employ position-dependent gravitational constant as a means to localize massless gravitons on multiple domain walls, thus creating the background dynamically. In this setting, it would be interesting to investi-gate spectra of graviphotons and fluctuations of domain walls as they are natural candidates for dark matter (for details of massive vector-like dark matter coming from brane oscillations see [61,62] We also have Putting everything together, we find the quadratic Lagrangian µ gets non-zero mass by the ordinary Higgs mechanism. In R → ∞ limit, the KK tower becomes massless, and indeed all of σ (k) appears always with a (k) µ .…”

Brane vector dynamics from embedding geometry

“…When the broken higher dimensional symmetries are realized locally, a gravitational Higgs mechanism ensues and these Nambu-Goldstone modes become the longitudinal components of massive vector fields [1,2]. The phenomenology of these (brane) vector fields has recently been considered [3] and contrasted with that resulting from including only the longitudinal (branon) modes [4]- [5].…”

Higgs decays and brane gravi-vectors

“…For a single codimension, N ¼ 1, the vector is stable provided there is a unbroken parity with respect to the extra dimension under which the brane vector is odd. Being stable, the vectors are also candidates for the dark matter of the Universe and are thus subject to the appropriate constraints [4].…”

“…For a single codimension, N ¼ 1, the vector is stable provided there is a unbroken parity with respect to the extra dimension under which the brane vector is odd. Being stable, the vectors are also candidates for the dark matter of the Universe and are thus subject to the appropriate constraints [4].The method of nonlinear realizations is a powerful tool which can be used to extract the generic form of vector interactions in a model independent given only the structure of the particular symmetry breakdown. In previous work [1], we applied this coset construction to the case of local space-time symmetries in brane world models.…”

“…Thus the effective interaction (1) is characterized by two mass scales, F X and M X , which we treat as free parameters as well as five model-dependent dimensionless couplings, 1 , 2 , 1 , 2 , 3 . Constraints on the F X À M X parameter space have been obtained [4] using collider data and dark matter limits. For the numerical estimates made in this paper, we shall, for definiteness, use the value F X ¼ 250 GeV which is well within the currently allowed range for M X 100 GeV and is appropriate for a Higgs boson with mass less than 200 GeV.…”