High Mass Di-Tau Analysis and Search for Z'

High Mass Di-Tau Analysis and Search for Z'

We present the results of a search for new particles decaying to tau pairs, using data corresponding to an integrated luminosity of 195 pb^-1 collected with the CDF detector at the Tevatron. Hypothetical particles, such as Z' and MSSM Higgs boson A can potentially produce such pairs. We discuss the methods of tau identification, and show the signal acceptance versus new particle mass. The low-mass region, dominated by Z -> tau,tau, is used as a control region. No significant excess of events over the estimated backgrounds is observed in the high-mass region, and we set upper limits on the cross section times branching ratio as a function of the Z' and A mass.

Contacts: Zongru Wan, John Conway, Anton Anastassov, Fedor Ratnikov
Data: Run II, 195 pb^-1
Documentation: PS, PDF

Plots and Tables:

Tau Reconstruction and Identification:
	Sketch of seed track, signal cone, and isolation cone for tau candidates, EPS or GIF.
	Tau reconstruction and identification efficiency as function of visible tau energy, EPS or GIF.
	Rate of jets misidentified as taus as function of visible tau energy, EPS or GIF.
Low-Mass Control Region Cross-Checks:
	Di-tau track multiplicity distribution in the control region, EPS or GIF.
The Di-Tau Mass Spectrum:
	Reconstructed di-tau mass distribution, linear scale, EPS or GIF.
	Reconstructed di-tau mass distribution, logarithmic scale, EPS or GIF.
Signal Acceptances:
	Z' acceptance as function of Z' mass, EPS or GIF.
	Pseudo-scalar Higgs acceptance as function of Higgs mass, EPS or GIF.
Numbers:
	Three pages of tables with numbers, PS or PDF.
Cross-Section Times Branching Ratio and Mass Limits:
	Z' cross-section times branching ratio into tau pair as function of Z' mass and Z' mass limit, EPS or GIF.
	Cross-section times branching ratio into tau pair limits for vector or scalar new particles as function of new particle mass, EPS or GIF.

Page page: http://www-cdf.fnal.gov/physics/exotic/r2a/20041014.ditau_zprime/index.html was last updated November 3rd, 2004 by Stephan Lammel.
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