We compare the inclusive production of events containing a lepton (l), a photon (gamma), significant transverse momentum imbalance (MET), and a jet identified as containing a b-quark, to SM predictions. The search uses data produced in proton-antiproton collisions at root s = 1.96 TeV corresponding to 1.9 fb(-1) of integrated luminosity taken with the CDF detector. We find 28 l gamma b MET events versus an expectation of 31.0(-3.5)(+4.1) events. If we further require events to contain at least three jets and large total transverse energy, the largest SM source is radiative top-quark pair production, t (t) over bar + gamma. In the data we observe 16 t (t) over bar gamma candidate events versus an expectation from SM sources of 11.2(-2.1)(+2.3) Assuming the difference between the observed number and the predicted non-top-quark total of 6.8(-2.0)(+2.2) is due to SM top- quark production, we estimate the t (t) over bar gamma cross section to be (0.15 +/- 0.08) pb.

T., A., J., A., T., A., B. A., G., S., A., D., A., et al. (2009). Searching the inclusive l gamma MET + b-quark signature for radiative top quark decay and non-standard-model processes. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 80, 011102-1-011102-10 [10.1103/PhysRevD.80.011102].

Searching the inclusive l gamma MET + b-quark signature for radiative top quark decay and non-standard-model processes

CIOCCI, MARIA AGNESE;
2009-01-01

Abstract

We compare the inclusive production of events containing a lepton (l), a photon (gamma), significant transverse momentum imbalance (MET), and a jet identified as containing a b-quark, to SM predictions. The search uses data produced in proton-antiproton collisions at root s = 1.96 TeV corresponding to 1.9 fb(-1) of integrated luminosity taken with the CDF detector. We find 28 l gamma b MET events versus an expectation of 31.0(-3.5)(+4.1) events. If we further require events to contain at least three jets and large total transverse energy, the largest SM source is radiative top-quark pair production, t (t) over bar + gamma. In the data we observe 16 t (t) over bar gamma candidate events versus an expectation from SM sources of 11.2(-2.1)(+2.3) Assuming the difference between the observed number and the predicted non-top-quark total of 6.8(-2.0)(+2.2) is due to SM top- quark production, we estimate the t (t) over bar gamma cross section to be (0.15 +/- 0.08) pb.
2009
T., A., J., A., T., A., B. A., G., S., A., D., A., et al. (2009). Searching the inclusive l gamma MET + b-quark signature for radiative top quark decay and non-standard-model processes. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 80, 011102-1-011102-10 [10.1103/PhysRevD.80.011102].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/38051
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