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High Energy


Joint Theory Seminar - Jared Kaplan

Description Joint Theory Seminar
Speaker: Jared Kaplan
Title: Predictions from a Tevatron Anomaly
Host: Markus Luty
Room: 432

We examine the implications of the recent CDF measurement of the top-quark forward-backward asymmetry, focusing on a scenario with a new color octet vector boson at 1-3 TeV. We study several models, as well as a general effective field theory, and determine the parameter space which provides the best simultaneous fit to the CDF asymmetry, the Tevatron top pair production cross section, and the exclusion regions from LHC dijet resonance and contact interaction searches. Flavor constraints on these models are more subtle and less severe than the literature indicates. We find a large region of allowed parameter space at high axigluon mass and a smaller region at low mass; we match the latter to an SU(3)xSU(3)/SU(3) coset model with a heavy vector-like fermion. Our scenario produces discoverable effects at the LHC with only 1-2 inverse femtobarns of luminosity at 7-8 TeV. Lastly, we point out that a Tevatron measurement of the b-quark forward-backward asymmetry would be very helpful in characterizing the physics underlying the top-quark asymmetry.
Date Mon, March 7, 2011
Time 5:30am-6:30am PST
Duration 1 hour
Access Public
Created by High-Energy Seminars
Updated Tue, March 1, 2011 6:07am PST
Send Reminder Yes  -  0 days 4 hour 0 minutes before start

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