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Phys. Rev. D 65, 052006 (2002) [22 pages]

Searches for new physics in events with a photon and b-quark jet at CDF

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T. Affolder et al. (CDF Collaboration)
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Received 2 June 2001; published 7 February 2002

We have searched for evidence of physics beyond the standard model in events that include an energetic photon and an energetic b-quark jet, produced in 85 pb-1 of p̅ p collisions at 1.8 TeV at the Tevatron Collider at Fermilab. This signature, containing at least one gauge boson and a third-generation quark, could arise in the production and decay of a pair of new particles, such as those predicted by supersymmetry, leading to a production rate exceeding standard model predictions. We also search these events for anomalous production of missing transverse energy, additional jets and leptons (e, μ and τ), and additional b quarks. We find no evidence for any anomalous production of γb or γb+X events. We present limits on two supersymmetric models: a model where the photon is produced in the decay χ̃20→γχ̃10, and a model where the photon is produced in the neutralino decay into the gravitino LSP, χ̃10→γG̃. We also present our limits in a model-independent form and test methods of applying model-independent limits.


©2002 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevD.65.052006
DOI: 10.1103/PhysRevD.65.052006
PACS: 13.85.Rm, 13.85.Qk, 14.80.Ly

* Present address: Northwestern University, Evanston, Illinois 60208.
† Present address: Carnegie Mellon University, Pittsburgh, Pennsylvania 15213.

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