Article

# Search for Large Extra Dimensions in the Production of Jets and Missing Transverse Energy in p p ¯ Collisions at s = 1.96 TeV

Università di Pisa, Pisa, Tuscany, Italy

Physical Review Letters (Impact Factor: 7.51). 11/2006; 97(17):171802. DOI: 10.1103/PhysRevLett.97.171802 Source: PubMed

**ABSTRACT**

We present the results of a search for new physics in the jets plus missing transverse energy data sample collected from 368 pb(-1) of pp collisions at square root of s = 1.96 TeV recorded by the Collider Detector at Fermilab. We compare the number of events observed in the data with a data-based estimate of the standard model backgrounds contributing to this signature. We observe no significant excess of events, and we interpret this null result in terms of lower limits on the fundamental Planck scale for a large extra dimensions scenario.

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**ABSTRACT:**In the large extra dimensional ADD scenario, Z bosons undergo a one-loop decay into a photon and Kaluza-Klein towers of gravitons/gravi-scalars. We calculate such a decay width, extending previous arguments about the general form of the four-dimensional on-shell amplitude. The amplitudes calculated are relevant to processes in other extra dimensional models where the Standard Model fields are confined to a 4-brane.

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