8-13 August 2011
Rhode Island Convention Center
US/Eastern timezone

Measurement of the top pair invariant mass distribution at 7 TeV and search for New Physics

Aug 10, 2011, 5:30 PM
553 (Rhode Island Convention Center)


Rhode Island Convention Center

Parallel contribution Top Quark Physics Top Quark Physics


Salvatore Rappoccio (Department of Physics and Astronomy-Johns Hopkins University (J)


We present a measurement of the top-pair mass in tt events by using proton-proton collisions at the LHC at a centre-of-mass energy of 7 TeV. We use data collected with the CMS experiment during the year 2011. The analysis is performed in all possible final states originating from top-pair production, and the full event reconstruction is performed by using different reconstruction methods according to the final state under consideration. The measurement is then used for searching for production of a massive, narrow-width, neutral boson decaying into top-pairs. We observe no significant deviations from the QCD expectations, therefore we translate the measurement into an upper limit on the new physics production cross-section as a function of the particle mass.

Primary author

Salvatore Rappoccio (Department of Physics and Astronomy-Johns Hopkins University (J)

Presentation materials