Signatures in the Planck regime

  • String theory suggests the existence of a minimum length scale. An exciting quantum mechanical implication of this feature is a modification of the uncertainty principle. In contrast to the conventional approach, this generalised uncertainty principle does not allow to resolve space–time distances below the Planck length. In models with extra dimensions, which are also motivated by string theory, the Planck scale can be lowered to values accessible by ultra high energetic cosmic rays (UHECRs) and by future colliders, i.e., Mf≈ 1 TeV. It is demonstrated that in this novel scenario, short distance physics below 1/Mf is completely cloaked by the uncertainty principle. Therefore, Planckian effects could be the final physics discovery at future colliders and in UHECRs. As an application, we predict the modifications to the e+e−→f+f− cross-sections.

Download full text files

Export metadata

Additional Services

Share in Twitter Search Google Scholar
Author:Sabine HossenfelderORCiDGND, Marcus BleicherORCiDGND, Stefan Josef HofmannGND, Jörg RuppertGND, Stefan SchererORCiDGND, Horst StöckerORCiDGND
Parent Title (English):Physics Letters B
Publisher:North-Holland Publ.
Place of publication:Amsterdam [u.a.]
Document Type:Article
Year of Completion:2003
Year of first Publication:2003
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2023/09/19
Page Number:15
First Page:85
Last Page:99
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoCreative Commons - Namensnennung 3.0