2,271 research outputs found
Notes on Information-Theoretic Privacy
We investigate the tradeoff between privacy and utility in a situation where
both privacy and utility are measured in terms of mutual information. For the
binary case, we fully characterize this tradeoff in case of perfect privacy and
also give an upper-bound for the case where some privacy leakage is allowed. We
then introduce a new quantity which quantifies the amount of private
information contained in the observable data and then connect it to the optimal
tradeoff between privacy and utility.Comment: The corrected version of a paper appeared in Allerton 201
Privacy-Aware MMSE Estimation
We investigate the problem of the predictability of random variable under
a privacy constraint dictated by random variable , correlated with ,
where both predictability and privacy are assessed in terms of the minimum
mean-squared error (MMSE). Given that and are connected via a
binary-input symmetric-output (BISO) channel, we derive the \emph{optimal}
random mapping such that the MMSE of given is minimized while
the MMSE of given is greater than for a
given . We also consider the case where are continuous
and is restricted to be an additive noise channel.Comment: 9 pages, 3 figure
Higgs pair production in vector-boson fusion at the LHC and beyond
The production of pairs of Higgs bosons at hadron colliders provides unique
information on the Higgs sector and on the mechanism underlying electroweak
symmetry breaking (EWSB). Most studies have concentrated on the gluon fusion
production mode which has the largest cross section. However, despite its small
production rate, the vector-boson fusion channel can also be relevant since
even small modifications of the Higgs couplings to vector bosons induce a
striking increase of the cross section as a function of the invariant mass of
the Higgs boson pair. In this work, we exploit this unique signature to propose
a strategy to extract the quartic coupling and provide model-independent
constraints on theories where EWSB is driven by new strong interactions. We
take advantage of the higher signal yield of the final state
and make extensive use of jet substructure techniques to reconstruct signal
events with a boosted topology, characteristic of large partonic energies,
where each Higgs boson decays to a single collimated jet . Our results
demonstrate that the coupling can be measured with 45% (20%) precision
at the LHC for 300 (3000) fb, while a 1% precision can be
achieved at a 100 TeV collider.Comment: Updated to match published version in EPJC and fixed typo in Tab. 10
(column labels a & b were swapped
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