Neutrino reconstruction with topological information

Abstract

In general a decay with a missing (not detected) particle can not be fully reconstructed apart from a few exceptions. For example, if the momentum of the decaying particle is known or if the missing energy in an event is measured precisely, then the missing particle 4-momentum can be determined. Here a new method is proposed that utilizes additional information about the topology of a decay: The direction from the primary to the secondary vertex combined with momentum conservation allows the determination of the missing particle momentum up to a twofold ambiguity. The semileptonic decay of the Bs mesons is considered as an example to illustrate this method and to compare its performance against conventional approaches.

8 pages, 5 figures corrected typos, updated figures

References in corpus (6)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• Direct Limits on the Bs Oscillation Frequency
• Measurement of the $B_s^0$ Lifetime Using Semileptonic Decays
• Measurement of the Lambda_b lifetime using semileptonic decays
• Measurement of the Bs0 Meson Lifetime Using Semileptonic Decays

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• Entanglement and Bell nonlocality with bottom-quark pairs at hadron colliders
• Prospects for measuring quark polarization and spin correlations in $b\bar{b}$ and $c\bar{c}$ samples at the LHC