Constraints on extra dimensional theories from virtual graviton exchange - INSPIRE

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Constraints on extra dimensional theories from virtual graviton exchange

Gian Francesco Giudice
(
- CERN
)
,
Alessandro Strumia
(
- Pisa U. and
- INFN, Pisa
)

Jan, 2003

12 pages

Published in:

Nucl.Phys.B 663 (2003) 377-393

e-Print:

hep-ph/0301232 [hep-ph]

DOI:

10.1016/S0550-3213(03)00404-8

PDG: Mass Limits on

\mathit M_{\mathit TT}

Report number:

IFUP-TH-2003-4,
CERN-TH-2003-013

View in:

reference search88 citations

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Abstract: (arXiv)

We study the effective interactions induced by loops of extra-dimensional gravitons and show the special role of a specific dimension-6 four-fermion operator, product of two flavour-universal axial currents. By introducing an ultraviolet cut-off, we compare the present constraints on low-scale quantum gravity from various processes involving real-graviton emission and virtual-graviton exchange. The LEP2 limits on dimension-6 four-fermion interactions give one of the strongest constraint on the theory, in particular excluding the case of strongly-interacting gravity at the weak scale.

Note:

12 pages

12.60.-i
grand unified theory
operator: (4fermion)
operator: higher-dimensional
graviton: exchange
graviton: emission
quantum gravity
tree approximation
Feynman graph: higher-order
gauge boson: exchange

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