5,006 research outputs found
Higgs-photon resonances
We study models that produce a Higgs boson plus photon ()
resonance at the LHC. When the resonance is a boson, decays to occur at one loop. If the boson couples at tree-level to quarks,
then the branching fraction is typically of order or
smaller. Nevertheless, there are models that would allow the observation of at TeV with a cross section times branching
fraction larger than 1 fb for a mass in the 200--450 GeV range, and larger
than 0.1 fb for a mass up to 800 GeV. The 1-loop decay of the into lepton
pairs competes with , even if the couplings to leptons vanish
at tree level. We also present a model in which a boson decays into a
Higgs boson and a pair of collimated photons, mimicking an
resonance. In this model, the resonance search would be the
discovery mode for a as heavy as 2 TeV. When the resonance is a scalar,
although decay to is forbidden by angular momentum conservation,
the plus collimated photons channel is allowed. We comment on prospects
of observing an resonance through different Higgs decays, on
constraints from related searches, and on models where is replaced by a
nonstandard Higgs boson.Comment: 22 page
William Leggett: his life, his ideas, and his political role
The events that Leggett helped to put into motion in New York City eventually spread throughout the country, bringing about in the end, a national Democratic Party which is directly connected to the present day Party
First International Conference on Laboratory Research for Planetary Atmospheres
Proceedings of the First International Conference on Laboratory Research for Planetary Atmospheres are presented. The covered areas of research include: photon spectroscopy, chemical kinetics, thermodynamics, and charged particle interactions. This report contains the 12 invited papers, 27 contributed poster papers, and 5 plenary review papers presented at the conference. A list of attendees and a reprint of the Report of the Subgroup on Strategies for Planetary Atmospheres Exploration (SPASE) are provided in two appendices
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