Virtual graviton exchanges at the Z-pole in large extra dimensions
arXiv:hep-ph/0210318 · doi:10.1016/S0370-2693(02)03164-7
Abstract
In the framework of quantum gravity propagating in large extra dimensions, the effects of virtual Kaluza-Klein gravitons on the imaginary part of the amplitude of the process e+ e- --> f f-bar are analyzed at the Z-pole. Notably, the interference of the almost-continuous spectrum of the KK gravitons with the standard model resonant amplitude is finite and predictable in terms of the fundamental D-dimensional Plank scale M_D. We find that, while the virtual-gravitons effect on total cross sections vanishes at tree-level, both angular and polarization asymmetries are modified by terms whose relative effect is at most of order 10^(-4) for M_D > 1 TeV. Possible shifts in the M_Z, due to changes in the Breit-Wigner line shape are also discussed.
Version to appear in Physics Letters B
References in corpus (23)
- The Hierarchy Problem and New Dimensions at a Millimeter
- New Dimensions at a Millimeter to a Fermi and Superstrings at a TeV
- Phenomenology, Astrophysics and Cosmology of Theories with Sub-Millimeter Dimensions and TeV Scale Quantum Gravity
- Quantum Gravity and Extra Dimensions at High-Energy Colliders
- On Kaluza-Klein States from Large Extra Dimensions
- Bulk Gauge Fields in the Randall-Sundrum Model
- Warped Phenomenology
- Indirect Collider Signals for Extra Dimensions
- Phenomenology of a Stabilized Modulus
- Experimental Probes of Localized Gravity: On and Off the Wall
- TESLA Technical Design Report Part III: Physics at an e+e- Linear Collider
- Collider Signatures of New Large Space Dimensions
- Experimental Status of Gravitational-Strength Forces in the Sub-Centimeter Regime
- Graviscalars from higher-dimensional metrics and curvature-Higgs mixing
- TeV Strings and Collider Probes of Large Extra Dimensions
- Macroscopic Forces from Supersymmetry
- Transplanckian Collisions at the LHC and Beyond
- Probes Of Universal Extra Dimensions at Colliders
- Looking For TeV-Scale Strings and Extra-Dimensions
- S-Matrix Approach to the Line Shape
- String theory predictions for future accelerators
- Collider Tests of Compact Space Dimensions Using Weak Gauge Bosons
- Kaluza-Klein Excitations and Electroweak Symmetry Breaking
Cited by in corpus (9)
- The role of polarized positrons and electrons in revealing fundamental interactions at the Linear Collider
- Transverse Polarization Signatures of Extra Dimensions at Linear Colliders
- Discriminating graviton exchange effects from other new physics scenarios in e^+e^- collisions
- Center-Edge Asymmetry at Hadron Colliders
- More Transverse Polarization Signatures of Extra Dimensions at Linear Colliders
- Identification of indirect new physics effects at e^+e^- colliders: the large extra dimensions case
- Violation of Angular Momentum Selection Rules in Quantum Gravity
- Large extra dimension effects in Higgs boson production at linear colliders and Higgs factories
- Indian Contributions to LHC Theory