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T: Fachverband Teilchenphysik

T 24: Higgs-Boson (Zerfall in Tau-Leptonen) II

T 24.3: Vortrag

Montag, 29. Februar 2016, 17:15–17:30, VMP5 HS A

Missing Mass Calculator as a technique to reconstruct the mass of resonances decaying into tau pairs — Blumenschein Ulla, •De Maria Antonio, Quadt Arnulf, and Zinonos Zinonas — II. Physikalisches Institut, Georg-August-Universität Göttingen

An accurate reconstruction of a resonance mass decaying into a pair of tau leptons is a difficult task because of the presence of multiple undetected neutrinos from the tau decays. The Missing Mass Calculator (MMC) is a sophisticated method to optimise the reconstruction of this events. It is based on the requirement that mutual orientations of the neutrinos and other decay products are consistent with the mass and decay kinematics of a tau lepton. This is achieved by minimizing a likelihood function defined in the kinematically allowed phase space region. MMC was one of the most powerful tools used in SM-Higgs to tau tau searches in Run1 at LHC. Now, in Run2, LHC collides proton-proton at center of mass energy √s = 13 TeV and at higher luminosity. Therefore, many efforts need to be done to optimise the analysis tools to the new experimental conditions. Amongst these tools, MMC requires to be retuned in order to play a key role again in the searches of the Higgs boson in di-tau final states. This talk will outline the main aspects of the MMC retuning and the impact on its performance.