2,413 research outputs found
Learning to See at the Large Hadron Collider
The staged commissioning of the Large Hadron Collider presents an opportunity
to map gross features of particle production over a significant energy range. I
suggest a visual tool - event displays in (pseudo)rapidity-transverse-momentum
space - as a scenic route that may help sharpen intuition, identify interesting
classes of events for further investigation, and test expectations about the
underlying event that accompanies large-transverse-momentum phenomena.Comment: 13 pages, 3 figures, pdfte
Realizing the Potential of Quarkonium
I recall the development of quarkonium quantum mechanics after the discovery
of . I emphasize the empirical approach to determining the force
between quarks from the properties of and bound states. I
review the application of scaling laws, semiclassical methods, theorems and
near-theorems, and inverse-scattering techniques. I look forward to the next
quarkonium spectroscopy in the system.Comment: 16 pages, 8 eps figures, uses aipproc and boxedeps. Symposium on
Twenty Beautiful Years of Bottom Physics, IIT, 29 June - 2 July 1997
Published version Published versio
Particle Physics-Future Directions
Wonderful opportunities await particle physics over the next decade, with the
coming of the Large Hadron Collider at CERN to explore the 1-TeV scale
(extending efforts at LEP and the Tevatron to unravel the nature of electroweak
symmetry breaking) and many initiatives to develop our understanding of the
problem of identity: what makes a neutrino a neutrino and a top quark a top
quark. Here I have in mind the work of the B factories and the Tevatron
collider on CP violation and the weak interactions of the b quark; the
wonderfully sensitive experiments at Brookhaven, CERN, Fermilab, and Frascati
on CP violation and rare decays of kaons; the prospect of definitive
accelerator experiments on neutrino oscillations and the nature of the
neutrinos; and a host of new experiments on the sensitivity frontier. We might
even learn to read experiment for clues about the dimensionality of spacetime.
If we are inventive enough, we may be able to follow this rich menu with the
physics opportunities offered by a linear collider and a (muon storage ring)
neutrino factory. I expect a remarkable flowering of experimental particle
physics, and of theoretical physics that engages with experiment. I describe
some of the great questions before us and the challenges of providing the
instruments that will be needed to define them more fully and-eventually-to
answer them.Comment: Invited paper at the 2001 Particle Accelerator Conference, Chicago; 5
pages; uses JAC2001.cls (included
The State of the Standard Model
I quickly review the successes of quantum chromodynamics. Then I assess the
current state of the electroweak theory, making brief comments about the search
for the Higgs boson and some of the open issues for the theory. I sketch the
problems of mass and mass scales, and point to a speculative link between the
question of identity and large extra dimensions. To conclude, I return to QCD
and the possibility that its phase structure might inform our understanding of
electroweak symmetry breaking.Comment: 26 pages, 15 figures, uses aipproc (included) and boxedeps; opening
lecture at Conference on the Physics Potential and Development of Muon
Colliders and Neutrino Factories, San Francisco, December 15-17, 1999. Added
reference
Cosmic Neutrinos
I recall the place of neutrinos in the electroweak theory and summarize what
we know about neutrino mass and flavor change. I next review the essential
characteristics expected for relic neutrinos and survey what we can say about
the neutrino contribution to the dark matter of the Universe. Then I discuss
the standard-model interactions of ultrahigh-energy neutrinos, paying attention
to the consequences of neutrino oscillations, and illustrate a few topics of
interest to neutrino observatories. I conclude with short comments on the
remote possibility of detecting relic neutrinos through annihilations of
ultrahigh-energy neutrinos at the resonance.Comment: 27 pages, 16 figures, uses RevTeX, lecture at 2007 SLAC Summer
Institute; added references, footnote clarifie
Next Steps
Closing talk at Snowmass 2001: a summer study on the future of particle
physics.Comment: 4 pages, uses ReVTeX4; typo correcte
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