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Topic: Tevatron

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	Tevatron's Higgs Quest Quickens -- Physics News Update 821
		Physicists from Fermilab’s Tevatron collider have just reported their most comprehensive summary yet of physics at the highest laboratory energies.
		The Tevatron labors can be compared to work at the Burgess Shale, the fossilbed in the Canadian Rockies where archeologists uncovered impressions of organisms that hadn’t been seen in 600 million years, including some new phyla.
		Again, no major new particles were found, but further experience in handling myriad background phenomena will help prepare the way for what Tevatron scientists hope will be their main accomplishment: digging evidence for the Higgs out from a rich seam of other particles.
	www.aip.org /pnu/2007/split/821-1.html (695 words)

	Tevatron
		Tevatron is a circular particle accelerator (or synchrotron) at the Fermi National Accelerator Laboratory.
		The Tevatron was completed in 1983 at a cost of $120 million and has been regularly upgraded since then, the Main Injector was the most substantial addition built over five years from 1994 at a cost of $299 million.
		The protons and antiprotons are accelerated in opposite directions, crossing paths in the CDF and D0 (zero) detectors to collide at 1.96 TeV.
	www.ebroadcast.com.au /lookup/encyclopedia/te/Tevatron.html (341 words)

	Run II Luminosity
		A series of accelerators continuously add energy to subatomic particles until they are racing around the Tevatron at 99.999 percent of the speed of light in a vacuum.
		In the Tevatron, two kinds of particles - protons and antiprotons - are sent around the ring in bunches, or "beams", in opposite directions.
		The energy of Tevatron collisions cannot be significantly raised therefore increasing the number and rate of collisions is the only path to discovery.
	www-d0.fnal.gov /runcoor/RUN/run2_lumi.html (538 words)

	A 150 GeV MI-11 to Tevatron Beamline Solution
		Prior to the Breckenridge workshop, a satisfactory solution of the Main Injector to Tevatron 150 Gev/c transport line had not been found that was consistent with a shared extraction channel for 8 Gev/c antiprotons from the Accumulator.
		To achieve the necessary vertical phase advance of the dispersion vector between the vertical bends to allow the dispersion in the Tevatron injection line to be canceled by VB3, the vertical beta function must be kept small between the lambertson and VB2 and large at VB3.
		The horizontal dispersion and beta functions are matched to the Tevatron through the use of a mistuned horizontal achromat cell between Q7 and Q12.
	www-fmi.fnal.gov /fmiinternal/MI_Notes_Pages/MI-0007.html (1226 words)

	CERN Courier - Looking forward to physics a - IOP Publishing - article
		Fermilab's Tevatron proton-antiproton collider is once again exploring the high-energy frontier, with newly upgraded detectors and a physics programme that will address some of the biggest questions in particle physics.
		Tevatron Run II is under way at Fermilab, with upgraded detectors addressing some of the most important questions in particle physics.
		As long as the Tevatron remains the world's highest-energy collider, it is a unique facility that must be exploited to its limit; this will remain true until the LHC experiments start producing competitive physics results.
	cerncourier.com /main/article/43/1/14 (3187 words)

	Record-breaking luminosity boosts discovery potential at Fermilab's Tevatron collider
		The record-breaking performance of the Tevatron collider at the Department of Energy's Fermi National Accelerator Laboratory is pushing the search for dark matter, supersymmetric particles and extra dimensions to new limits.
		Since restarting the Tevatron collider after a scheduled shutdown in December 2004, the collider has produced an integrated luminosity of 872 inverse picobarns-a measure for the number of collisions achieved.
		Tevatron luminosity depends on having roughly equal numbers of protons and antiprotons in the colliding beams.
	www.physorg.com /news11398.html (954 words)

	Tevatron set to resume search for top quark
		Earlier this week, Fermi National Laboratory's Tevatron collider went on line again after a three-year hiatus, with two giant state-of-the-art particle detectors -- the Collider Detector Facility (CDF) and the D Zero -- in the beam line.
		The CDF is the original detector for the Tevatron collider.
		In fact, both the CDF and the D-Zero detectors, while remaining alert for any unexpected physics that might come their way, have automatic "express lines" -- special tapes that will record likely top candidates the instant they are detected and move them to the head of the line for data analysis.
	www.lbl.gov /Science-Articles/Archive/tevatron-quark-search.html (980 words)

	Accelerators
		Associated with the Tevatron are two large detector facilities, the Collider Detector Facility and the D0 detector facility.
		Beneath the Main Ring at Fermilab in the same tunnel is another synchrotron, a superconducting magnetic ring called the Tevatron which boosts the energy to 1 TeV.
		The Tevatron makes use of superconducting magnets to achieve the high energies and reduce operating costs.
	hyperphysics.phy-astr.gsu.edu /hbase/particles/accel.html (708 words)

	The Run II of the Tevatron
		Together with the measurements of the mass of the charged weak boson W performed both at LEP and at the Tevatron, and of the top quark mass at the Tevatron, the same consistency requirement of the Standard Model now predicts that the mass of the Higgs boson should be lower than 190 GeV [5] (Fig.
		Masses of the W boson and of the top quark as measured directly at LEP and at the Tevatron (in green), and as indirectly predicted, based on precision measurements at the Z resonance (in red); the contours drawn correspond to a confidence level of 68%.
		The curves represent, as a function of the Higgs boson mass, the luminosity which has to be delivered to each of the two experiments in order to allow an exclusion at 95% confidence level (in purple), a 3s evidence (in green), or a 5s observation (in blue) to be achieved.
	www.europhysicsnews.com /full/19/article2/article2.html (1640 words)

	Superconductor Week - Industry News Releases
		The record-breaking performance of the Tevatron collider at the Department of Energy’s Fermi National Accelerator Laboratory is pushing the search for dark matter, supersymmetric particles and extra dimensions to new limits.
		Since restarting the Tevatron collider after a scheduled shutdown in December 2004, the collider has produced an integrated luminosity of 872 inverse picobarns
		The Large Hadron Collider (LHC) at the European laboratory CERN will be turning on in 2007, with collisions at an energy seven times higher than the Tevatron can produce.
	www.superconductorweek.com /pr/0306aax/tev1.htm (951 words)

	2 March 2006 - Fermilab: Record-breaking luminosity boosts discovery potential at Fermilab's Tevatron collider
		Since restarting the Tevatron collider after a scheduled shutdown in December 2004, the collider has produced an integrated luminosity of 872 inverse picobarns—a measure for the number of collisions achieved.
		Following extensive upgrades, the high-energy Tevatron collider racked up a series of records in 2005 (see footnote), doubling the average peak luminosity—or beam brightness—and raising the world record for peak luminosity at a hadron collider to 17x10^31 inverse centimeter square per second.
		Footnote: Between December 2004 and February 2006, the average peak luminosity of the Tevatron collider doubled from 7x10^31 cm^(-2)sec^(-1) to 14x10^31 cm^(-2)sec^(-1).
	www.interactions.org /cms/?pid=1023946 (912 words)

	Tevatron collider yields new results on subatomic matter, forces
		The steadily increasing number of collision events produced by the Tevatron as well as the innovative analysis methods employed by CDF and DZero scientists bode well for future discoveries.
		Both Tevatron experiments have recorded candidate events for the production of a pair of Z bosons in a single collision, with the CDF experiment reporting a first value of the cross section of this process.
		The Tevatron experiments are within reach of directly excluding a Higgs boson with mass near 160 GeV/c2.
	www.physorg.com /news96040503.html (980 words)

	Record Breaking Luminosity Boosts Potential Of Tevatron Collider
		The record-breaking performance of the Tevatron collider at the US Department of Energy's Fermi National Accelerator Laboratory is pushing the search for dark matter, supersymmetric particles and extra dimensions to new limits.
		Accelerator experts at the lab announced that in only 14 months the Tevatron collider has produced almost five times the data sample collected during four years of Collider Run I (1992-1996), which led to the discovery of the top quark at Fermilab.
		Following extensive upgrades, the high-energy Tevatron collider racked up a series of records in 2005 (see footnote), doubling the average peak luminosity-or beam brightness-and raising the world record for peak luminosity at a hadron collider to 17x1031 inverse centimeter square per second.
	www.spacedaily.com /reports/Record_Breaking_Luminosity_Boosts_Potential_Of_Tevatron_Collider.html (1087 words)

	Inquiring Minds
		Creating tiny fireballs of high density and high temperature, physicists produce the particles that were abundant in the early universe, a trillionth of a second after the Big Bang.
		In 1995, the high-energy collisions of the Tevatron led to the discovery of the top quark, the heaviest elementary particle known to exist.
		The Tevatron accelerates and collides protons and antiprotons in a four-mile-long underground ring.
	www.fnal.gov /pub/inquiring/physics/accelerators/index.html (267 words)

	In order for the High Energy Testing of the Tevatron to proceed efficiently, a mathematical model
		High energy testing of the Tevatron has been continuing for many years in an attempt to raise the energy of the Tevatron.
		In order to help the high energy testing of the Tevatron, a mathematical model in an Excel database was developed to aid in the prediction of quenching magnets.
		The Tevatron had many design restrictions placed on it because it had to be built so that it could fit under the Main Ring.
	sist.fnal.gov /archive/96-topics/papers/Jose_Perez/jose_perez.htm (3999 words)

	Over The Top \| Subatomic Particles \| DISCOVER Magazine
		She went on to do postgraduate work at the University of California at Berkeley, where she became involved in building a particle detector of the sort placed around the collision chambers in accelerators so that physicists can determine which particles are created in the collisions.
		By the time the Tevatron got the additional proton-smashing power it needed to really find the top quark, Franklin was an integral part of the team.
		The Tevatron produces 300,000 particles per second, but even the powerful minicomputers that fill a good-size room in the accelerator building aren’t capable of processing and recording that much information in such a short time.
	discovermagazine.com /1995/feb/overthetop469 (4624 words)

	Tevatron luminosity makes an uphill climb
		Since the energy of Tevatron collisions cannot be significantly raised, increasing the number and rate of collisions is the only path to discovery.
		As the Tevatron complex began stable Run II operations in late summer of 2001, it became clear that achieving Run II goals would not be as straightforward as anticipated, said Associate Director Steve Holmes.
		Issues in the Tevatron appeared related to operations with 36 proton bunches, compared to the six bunches of Run I. The effect of the intense proton beam on the antiproton beam, the 'long-range beam-beam effect,' at the Tevatron injection energy of 150 GeV has a greater impact than we anticipated.
	www.eurekalert.org /features/doe/2002-03/dnal-tlm060502.php (1415 words)

	Session H14 - Top Cross Sections at the Tevatron.
		The measurement was made by the CDF experiment in proton-antiproton collisions at a center-of-mass energy of 1.96 TeV at the Fermilab Tevatron.
		The measurement uses t \bart decays into final states which contain one high transverse momentum lepton and multiple jets, where one of the jets is required to be identified as a b jet candidate by reconstructing secondary vertices from b-quark decay using the SVXII Silicon Vertex detector.
		The measurement proceeds by detecting all particles in the final state, which are a lepton and a neutrino from the W decay, two jets from the second W decay, and two b-jets.
	flux.aps.org /meetings/YR03/APR03/baps/abs/S2340.html (984 words)

	Run II Workshop - Higgs Working Group (Site not responding. Last check: )
		The lower edge of the bands is the calculated threshold; the bands extend upward from these nominal thresholds by 30% as an indication of the uncertainties in b-tagging efficiency, background rate, mass resolution, and other effects.
		The aim is to arrive at an "average" of D0 and CDF in terms of detector performance, and provide contributors to the Supersymmetry/Higgs Workshop with a standard, easy-to-use simulation with which to perform studies of supersymmetry and Higgs physics in Run II.
		MSSM HIGGS BOSON PHENOMENOLOGY AT THE TEVATRON COLLIDER.
	fnth37.fnal.gov /higgs.html (4223 words)

	symmetry - December 2006 - The Tevatron Brings It On
		There is no shortage of theoretical predictions of the discoveries that the Tevatron could produce, from the very likely (collisions producing single top quarks) to the speculative (finding extra dimensions of space).
		The Tevatron's most famous discovery to date is the top quark, discovered by CDF and DZero scientists in 1995.
		With the rising Tevatron luminosity, and leaps in analysis techniques, scientists can't help feeling that the Higgs is waiting to be found.
	www.symmetrymagazine.org /cms/?pid=1000409 (2538 words)

	Higgs boson: Glimpses of the God particle - fundamentals - 02 March 2007 - New Scientist
		But then, on that Saturday morning before Christmas, the CDF team saw the blip in their plot: signs that the Tevatron had produced a small number of some unknown particle with a mass of 160 gigaelectronvolts (GeV), which had promptly decayed to two tau leptons.
		If that is the case, then at least he has proved that the Tevatron collider is sensitive enough to catch glimpses of a host of other theoretical particles (see "Race you to the gluino").
		The Tevatron is scheduled to run at full throttle until 2009, collecting data faster than ever before.
	www.newscientist.com /article.ns?id=mg19325934.600&feedId=online-news_rss20 (3217 words)

	Fermilab Tevatron Department Documents and Talks
		Shiltsev, Tevatron Progress: January to March 2003 (doc server entry)
		Shiltsev, Tevatron Progress: March to May 2003 (doc server entry)
		Tevatron Injection Devices to use in the Closure Program" Jan.
	www-bdnew.fnal.gov /tevatron/talks.html (192 words)

	Oct. 3, 2003 - HEP Labs Collaborate for Tevatron Run II Luminosity
		Indeed, if there is a silver lining in the struggle to reach the Tevatron’s luminosity potential, it is the opportunity for collaboration and pooled expertise of the world’s experts in accelerator physics and technology.
		The Department of Energy’s Argonne National Laboratory is working with the Tevatron Department to develop a plan to improve the vacuum in the Tevatron by a factor of two.
		Scientists at Argonne National Laboratory are also studying the need for beam diagnostics to improve proton beam stability as well as beam stability in one of the Tevatron’s feeder accelerators.
	www.interactions.org /cms/?pid=1000648 (803 words)

	Accelerator Details: the Tevatron
		The Tevatron was the world's first superconducting synchrotron.
		There are about 1000 superconducting magnets in the Tevatron.
		This saves an enormous amount of electrical power over what would be required if the Tevatron had been built with conventional iron-copper-water cooled coils.
	www-bd.fnal.gov /public/tevatron.html (310 words)

	Higgs limits at the Tevatron: <1.4 x SM !! « A Quantum Diaries Survivor
		The dashed fl line shows the 95% CL limit that the Tevatron experiments were supposed to be able to set, given the datasets analyzed in each analysis and every small feature of each.
		The Tevatron has been a bit lucky there though: as you can see in the plot, the limit set at 160 GeV is about twice as good as the one they expected to set.
		However, I also have worked for 15 years at the Tevatron, and I happen to know that one thing are MC predictions and another is the maelstrom of a hadronic collision environment and the extraction of results from it.
	dorigo.wordpress.com /2007/08/23/higgs-limits-at-the-tevatron-15-x-sm (5100 words)

	TeVatron: What Is It?
		In experiments to find and measure the top quark, Fermilab physicists use the world's most powerful accelerator, the Tevatron.
		The protons and antiprotons travel in opposite directions around the Tevatron's four mile circumference.
		When the proton and antiproton meet, they collide with enough energy to allow the physicists to explore the decay of the kaon particle.
	www.elmhurst.edu /~phy/ktevtour/tevatron.htm (113 words)

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