29,534 research outputs found
Strange-Beauty Meson Production at Colliders
The production rates and transverse momentum distributions of the
strange-beauty mesons and at colliders are calculated
assuming fragmentation is the dominant process. Results are given for the
Tevatron in the large transverse momentum region, where fragmentation is
expected to be most important.Comment: Minor changes in the discussion section. Also available at
http://www.ph.utexas.edu/~cheung/paper.htm
Higgs Descendants
We define a Higgs descendant to be a particle beyond the standard
model whose mass arises predominantly from the vacuum expectation value of the
Higgs boson. Higgs descendants arise naturally from new physics whose intrinsic
mass scale is unrelated to the electroweak scale. The coupling of to the
Higgs boson is fixed by the mass and spin of , yielding a highly
predictive setup in which there may be substantial modifications to the
properties of the Higgs boson. For example, if the decay of the Higgs boson to
is kinematically allowed, then this branching ratio is largely
determined. Depending on the stability of , Higgs decays may result in a
variety of possible visible or invisible final states. Alternatively, loops of
may affect Higgs boson production or its decays to standard model
particles. If is stable dark matter, then the mandatory coupling between
and the Higgs boson gives a lower bound on the direct detection cross
section as a function of the mass. We also present a number of explicit
models which are examples of Higgs descendants. Finally, we comment on Higgs
descendants in the context of the excesses near 125 GeV recently observed at
ATLAS and CMS.Comment: 9 pages, 7 figures; version to appear in Phys. Rev. D; v3 typos
correcte
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The effect of the ground plane size and the height on small PIFA
This is the post-print version of the article - Copyright @ ISAP 201
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A non-thermal soldering technique to improve polymer based antenna performance
Copyright @ 2010 EuMCA non-thermal soldering technique using cold solder or electrically conductive epoxy for connecting SMA connectors to polymer based antennas is proposed in this paper. The proposed technique prevents damage to the polymer due to the solder iron heat and also the loss of efficiency through the use of indirect connections of the coaxial feed via copper pads glued to the antenna. The direct connection of the feed points via SMA connectors on to a transparent antenna designed on AgHT-8 material has been demonstrated. The method can also be applied to solder the coaxial feed points directly to the antenna instead of using copper pads which will introduce additional reflection losses. The technique involves the use of colder soldering instead of hot soldering so as to not damage the polymer based antenna as well as improve the efficiency of the antenna
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The effect of the mutual coupling on small reconfigurable antennas
Copyright @ ISAP 201
Long decoding runs for Galileo's convolutional codes
Decoding results are described for long decoding runs of Galileo's convolutional codes. A 1 k-bit/sec hardware Viterbi decoder is used for the (15, 1/4) convolutional code, and a software Viterbi decoder is used for the (7, 1/2) convolutional code. The output data of these long runs are stored in data files using a data compression format which can reduce file size by a factor of 100 to 1 typically. These data files can be used to replicate the long, time-consuming runs exactly and are useful to anyone who wants to analyze the burst statistics of the Viterbi decoders. The 1 k-bit/sec hardware Viterbi decoder was developed in order to demonstrate the correctness of certain algorithmic concepts for decoding Galileo's experimental (15, 1/4) code, and for the long-constraint-length codes in general. The hardware decoder can be used both to search for good codes and to measure accurately the performance of known codes
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Investigative study on the development of a green UWB antenna
Copyright @ 2010 ISA
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