Phys. Rev. Lett. 85, 3765–3768 (2000)

Universal Torsion-Induced Interaction from Large Extra Dimensions

Abstract

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Lay Nam Chang^1,*, Oleg Lebedev^1,†, Will Loinaz^1,2,‡, and Tatsu Takeuchi^1,§
¹Institute for Particle Physics and Astrophysics, Physics Department, Virginia Tech, Blacksburg, Virginia 24061
²Department of Physics, Amherst College, Amherst, Massachusetts 01002

Received 24 May 2000; published in the issue dated 30 October 2000

We consider the Kaluza-Klein (KK) scenario in which only gravity exists in the bulk. Without the assumption of symmetric connection, the presence of brane fermions induces torsion. The result is a universal axial contact interaction that dominates those induced by KK gravitons. This enhancement arises from a large spin density on the brane. Using a global fit to Z-pole observables, we find the 3σ bound on the scale of quantum gravity to be 28 TeV for n = 2. If Dirac or light sterile neutrinos are present, the data from SN1987A increase the bound to √nM_S≥210 TeV.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.85.3765

DOI:

10.1103/PhysRevLett.85.3765

PACS:

11.10.Kk, 04.50.+h, 13.38.Dg

^*Electronic address: laynam@vt.edu

^†Electronic address: lebedev@quasar.phys.vt.edu

^‡Electronic address: loinaz@alumni.princeton.edu

^§Electronic address: takeuchi@vt.edu

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Phys. Rev. Lett. 85, 3765–3768 (2000)

Universal Torsion-Induced Interaction from Large Extra Dimensions