9,048 research outputs found
The Experiment Road to the Heavier Quarks and Other Heavy Objects
After a brief history of heavy quarks, I will discuss charm, bottom, and top
quarks in turn. For each one, I discuss its first observation, and then what we
have learned about production, hadronization, and decays - and what these have
taught us about the underlying physics. I will also point out remaining open
issues. For this series of lectures, the charm quark will be emphasized. It is
the first of the heavy quarks, and its study is where many of the techniques
and issues first appeared. Only very brief mention is made of CP violation in
the bottom-quark system since that topic is the subject of a separate series of
lectures by Gabriel Lopez. As the three quarks are reviewed, a pattern of
techniques and lessons emerges. These are identified, and then briefly
considered in the context of anticipated physics signals of the future; e.g.,
for Higgs and SUSY particles.Comment: From three lectures at the "IX Escuela de Particulas y Campos" in
Metepec, Mexico - August, 2000. 30 pages, 5 figures Revised version with
spelling/grammar corrections and clearer figur
LHC Symposium 2003: Summary Talk
This summary talk reviews the LHC 2003 Symposium, focusing on expectations as
we prepare to leap over the current energy frontier into new territory. We may
learn from what happened in the two most recent examples of leaping into new
energy territory. Quite different scenarios appeared in those two cases. In
addition, we review the status of the machine and experiments as reported at
the Symposium. Finally, I suggest an attitude which may be most appropriate as
we look forward to the opportunities anticipated for the first data from the
LHC.Comment: Summary Talk: LHC Symposium, May 1-3, 2003, Fermilab, Batavia, IL US
Charm Results on CP Violation and Mixing
The most recent results on CP violation and mixing in the charm system are
reviewed as a guide to the future. While no surprising results are reported so
far, charm provides a unique window to physics beyond the Standard Model. The
results reported here come from four sources: ALEPH at LEP, E791 and FOCUS/E831
at Fermilab, and CLEO II.V at CESR. Results beyond these sources may be
expected as a byproduct of B-motivated experiments.Comment: 17 pages,including 4 figures, Workshop on Physics and Detectors for
Daphne, Frascati, Italy, November 16-19, 199
Future Hadron Physics at Fermilab
Today, hadron physics research occurs at Fermilab as parts of broader
experimental programs. This is very likely to be the case in the future. Thus,
much of this presentation focuses on our vision of that future - a future aimed
at making Fermilab the host laboratory for the International Linear Collider
(ILC). Given the uncertainties associated with the ILC - the level of needed
R&D, the ILC costs, and the timing - Fermilab is also preparing for other
program choices. I will describe these latter efforts, efforts focused on a
Proton Driver to increase the numbers of protons available for experiments. As
examples of the hadron physics which will be coming from Fermilab, I summarize
three experiments: MIPP/E907 which is running currently, and MINER A and
Drell-Yan/E906 which are scheduled for future running periods. Hadron physics
coming from the Tevatron Collider program will be summarized by Arthur Maciel
in another talk at Hadron05.Comment: To be published in the Proceedings of the XI International Conference
on Hadron Spectroscopy (Alberto Reis, editor) in the AIP Conference
Proceedings series, 10 page
Propellant tank pressurization system Patent
Method and apparatus for pressurizing propellant tanks used in propulsion motor feed syste
Versatile Digital GHz Phase Lock for External Cavity Diode Lasers
We present a versatile, inexpensive and simple optical phase lock for
applications in atomic physics experiments. Thanks to all-digital phase
detection and implementation of beat frequency pre-scaling, the apparatus
requires no microwave-range reference input, and permits phase locking at
frequency differences ranging from sub-MHz to 7 GHz (and with minor extension,
to 12 GHz). The locking range thus covers ground state hyperfine splittings of
all alkali metals, which makes this system a universal tool for many
experiments on coherent interaction between light and atoms.Comment: 4.5 pages, 5 figures v3: fixed error in schematic: R10 connects to
other end of C
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