11,100 research outputs found
Deep Cross-Modal Correlation Learning for Audio and Lyrics in Music Retrieval
Deep cross-modal learning has successfully demonstrated excellent performance in cross-modal multimedia retrieval, with the aim of learning joint representations between different data modalities. Unfortunately, little research focuses on cross-modal correlation learning where temporal structures of different data modalities such as audio and lyrics should be taken into account. Stemming from the characteristic of temporal structures of music in nature, we are motivated to learn the deep sequential correlation between audio and lyrics. In this work, we propose a deep cross-modal correlation learning architecture involving two-branch deep neural networks for audio modality and text modality (lyrics). Data in different modalities are converted to the same canonical space where inter modal canonical correlation analysis is utilized as an objective function to calculate the similarity of temporal structures. This is the first study that uses deep architectures for learning the temporal correlation between audio and lyrics. A pre-trained Doc2Vec model followed by fully-connected layers is used to represent lyrics. Two significant contributions are made in the audio branch, as follows: i) We propose an end-to-end network to learn cross-modal correlation between audio and lyrics, where feature extraction and correlation learning are simultaneously performed and joint representation is learned by considering temporal structures. ii) As for feature extraction, we further represent an audio signal by a short sequence of local summaries (VGG16 features) and apply a recurrent neural network to compute a compact feature that better learns temporal structures of music audio. Experimental results, using audio to retrieve lyrics or using lyrics to retrieve audio, verify the effectiveness of the proposed deep correlation learning architectures in cross-modal music retrieval
Invisible Higgs Decay at the LHeC
The possibility that the 125 GeV Higgs boson may decay into invisible
non-standard-model (non-SM) particles is theoretically and phenomenologically
intriguing. In this letter we investigate the sensitivity of the Large Hadron
Electron Collider (LHeC) to an invisibly decaying Higgs, in its proposed high
luminosity running mode. We focus on the neutral current Higgs production
channel which offers more kinematical handles than its charged current
counterpart. The signal contains one electron, one jet and large missing
energy. With a cut-based parton level analysis, we estimate that if the
coupling is at its standard model (SM) value, then assuming an integrated
luminosity of 1\,\mbox{ab}^{-1} the LHeC with the proposed 60 GeV electron
beam (with polarization) and 7 TeV proton beam is capable of probing
at level. Good lepton
veto performance (especially hadronic veto) in the forward region is
crucial to the suppression of the dominant background. We also explicitly
point out the important role that may be played by the LHeC in probing a wide
class of exotic Higgs decay processes and emphasize the general function of
lepton-hadron colliders in precision study of new resonances after their
discovery in hadron-hadron collisions.Comment: 6 pages, 3 figures. Description of the backgrounds, analysis and
results is simplified. Results unchanged with respect to v2. References
update
Three Dimensional Imaging of the Nucleon and Semi-Inclusive High Energy Reactions
We present a short overview on the studies of transverse momentum dependent
parton distribution functions of the nucleon. The aim of such studies is to
provide a three dimensional imagining of the nucleon and a comprehensive
description of semi-inclusive high energy reactions. By comparing with the
theoretical framework that we have for the inclusive deep inelastic
lepton-nucleon scattering and the one-dimensional imaging of the nucleon, we
summarize what we need to do in order to construct such a comprehensive
theoretical framework for semi-inclusive processes in terms of three
dimensional gauge invariant parton distributions. After that, we present an
overview of what we have already achieved with emphasize on the theoretical
framework for semi-inclusive reactions in leading order perturbative QCD but
with leading and higher twist contributions. We summarize in particular the
results for the differential cross section and the azimuthal spin asymmetries
in terms of the gauge invariant transverse momentum dependent parton
distribution functions. We also briefly summarize the available experimental
results on semi-inclusive reactions and parameterizations of transverse
momentum dependent parton distributions extracted from them and make an outlook
for the future studies.Comment: 20 pages, 7 figure
Exotic Higgs Decay at the LHeC
We study the exotic decay of the 125 GeV Higgs boson () into a pair of
light spin-0 particles () which subsequently decays and results in a
final state. This decay mode is well motivated in the Next to Minimal
Supersymmetric Standard Model (NMSSM) and extended Higgs sector models. Instead
of searching at the Large Hadron Collider (LHC) and the High Luminosity Large
Hadron Collider (HL-LHC) which are beset by large Standard Model (SM)
backgrounds, we investigate this decay channel at the much cleaner Large Hadron
Electron Collider (LHeC). With some simple selection cuts this channel becomes
nearly free of background at this machine, in stark contrast with the
situation at the (HL-)LHC. With a parton level analysis we show that for the
mass range , with luminosity the LHeC is
generally capable of constraining
( denotes the coupling strength relative to
the SM value) to a few percent level ( CLs). With luminosity
at a few per mille level can be probed. These sensitivities are much
better than the HL-LHC performance and demonstrate the important role expected
to be played by the LHeC in probing exotic Higgs decay processes, in addition
to the already proposed invisible Higgs decay channel.Comment: 10 pages, 5 figures. Version accepted by EPJC. Tables and figures
updated after correcting a mistake in signal event generation. Results
essentially unchange
Pair Production of Scalar Dyons in Kerr-Newman Black Holes
We study the spontaneous pair production of scalar dyons in the near extremal
dyonic Kerr-Newman (KN) black hole, which contains a warped AdS structure
in the near horizon region. The leading term contribution of the pair
production rate and the absorption cross section ratio are also calculated
using the Hamilton-Jacobi approach and the thermal interpretation is given. In
addition, the holographic dual conformal field theories (CFTs) descriptions of
the pair production rate and absorption cross section ratios are analyzed both
in the -, - and -pictures respectively based on the threefold dyonic
KN/CFTs dualities.Comment: 12 pages, 3 figures, revtex4. arXiv admin note: text overlap with
arXiv:1607.0261
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