Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Method to Estimate the Boson Mass and to Optimise Sensitivity to
  Helicity Correlations of tau+tau- Final States   In proton-proton collisions at LHC energies, Z and low mass Higgs bosons
would be produced with high and predominantly longitudinal boost with respect
to the beam axis. This note describes a new analysis tool devised to handle
this situation in cases when such bosons decay to a pair of tau-leptons. The
tool reconstructs the rest frame of the tau+tau- pair by finding the boost that
minimises the acollinearity between the visible tau decay products. In most
cases this gives a reasonable approximation to the rest frame of the decaying
boson. It is shown how the reconstructed rest frame allows for a new method of
mass estimation. Also a considerable gain in sensitivity to helicity
correlations is obtained by analysing the tau-jets in the reconstructed frame
instead of using the laboratory momenta and energies, particularly when both
tau-leptons decay hadronically.

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The categories of this paper are: ao-sci
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The categories of this paper are: econ
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The categories of this paper are: math
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The categories of this paper are: cond-mat
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The categories of this paper are: patt-sol
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The categories of this paper are: nlin
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-th
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The categories of this paper are: mtrl-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: funct-an
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The categories of this paper are: q-bio
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The categories of this paper are: hep-lat
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The categories of this paper are: acc-phys
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The categories of this paper are: q-fin
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The categories of this paper are: supr-con