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Topic: Pion

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In the News (Thu 25 Apr 19)

  Hadrons, baryons, mesons
The pion, being the lightest meson, can be used to predict the maximum range of the strong interaction.
The connection between pions and the strong force was proposed by Hideki Yukawa.
We now know that the pion is a meson, a composite particle, and the current view is that the strong interaction is an interaction between quarks, but the Yukawa theory stimulated a major advance in the understanding of the strong interaction.
hyperphysics.phy-astr.gsu.edu /hbase/particles/hadron.html   (1130 words)

  Pion - Wikipedia, the free encyclopedia
Pions are the lightest mesons and play an important role in explaining low-energy properties of the strong nuclear force.
In the modern understanding of the strong interaction (quantum chromodynamics), pions are considered to be the pseudo Nambu-Goldstone bosons of spontaneously broken chiral symmetry.
Pion currents thus couple to the axial vector current and pions participate in the chiral anomaly.
en.wikipedia.org /wiki/Pion   (906 words)

 TRIUMF: Cancer Therapy with Pions
At the point where the pions exit the beam line pipe, a special device is used to adjust the pions' depth of penetration into the tumour.
The pions are slowed down in proportion to the total thickness of the slabs inserted in their path at a given moment.
Pion therapy is not currently being used for patient treatments, pending the final results of randomized studies performed in the early 1990's.
www.triumf.ca /welcome/pion_trtmt.html   (1375 words)

 About pION
pION INC. is a rapidly growing, privately-held company, located in Woburn, at the center of the biotechnology community in the Boston area.
His accomplishments in the development of instrumentation include several well-known instruments currently manufactured by leading companies in the instrument market.
She has several years of experience using the Sirius PCA101/GLpKa Systems for pKa and log P analysis, and has valuable experience in technical and customer support, research and applications development.
www.pion-inc.com /about_pION.htm   (243 words)

 Discovery of the Pion --- 1947   (Site not responding. Last check: 2007-10-26)
While 1997 is being widely celebrated as the hundredth anniversary of the discovery of the electron by J.J. Thomson at Cambridge, the 50th anniversary of the 1947 discoveries of the pion by Cecil Powell at Bristol and 'V-particles' by George Rochester and Clifford Butler of Patrick Blackett's group in Manchester draw less attention.
The discovery of the pion and its subsequent decay highlighted the role of the muon (discovered by Anderson and Neddermeyer in 1936), while the Vs were the first examples of 'strange' particles containing a third type of quark.
It was, therefore, postulated that the latter represented the decay of positively-charged pions and the former the nuclear capture of negatively-charged pions.
pdg.lbl.gov /pion.html   (2245 words)

 pion. The Columbia Encyclopedia, Sixth Edition. 2001-05
The existence of the pion was predicted in 1935 by Hideki Yukawa, who theorized that it was responsible for the force of the strong interactions holding the atomic nucleus together.
The neutral pion is its own antiparticle, while the negative pion is the antiparticle of the positive pion.
It is now known that each pion (and, more generally, each meson) consists of a quark bound to an antiquark.
www.bartleby.com /65/pi/pion.html   (225 words)

 Group Pion Page   (Site not responding. Last check: 2007-10-26)
The members of the "Pion" group may be encountered at the Physikalisches Institut of the Universität Tübingen given they are not away for beamtime somewhere outside of Tübingen.
With the pion spectrometer LEPS at the Paul-Scherrer-Institut in Villigen, Switzerland, we plan to measure polarization observables using a newly developed polarizable scintillator as an active target.
The photo pion production on deuterium is being investigated at the electron accelerator MAMI at Mainz with the TAPS detector setup and by use of the Glasgow Tagger for tagging the real photons.
www.pit.physik.uni-tuebingen.de /clement/welcome_e.html   (660 words)

 Georgine Pion, Faculty, Psychology and Human Development, Peabody College, Vanderbilt University   (Site not responding. Last check: 2007-10-26)
Pion's research has focused on career development and human resource policy, particularly as it pertains to the education, training, and employment of scientists and clinical personnel.
In addition to training programs, her work has also involved the conduct of large-scale surveys aimed at evaluating peer review in the neurosciences, identifying the factors that affect satisfaction of NIH applicants for research grants, assessing the supply of and demand for faculty in special education, and trends in the education and employment of psychologists.
Pion, G.M., Mednick, M.T., Astin, H.S., Hall, C.C., Kenkel, M.B., Keita, G.P., Kohout, J.L., and Kelleher, J.C. The shifting gender composition of psychology: Trends and implications for the disciplines.
peabody.vanderbilt.edu /faculty/psychology/pion.htm   (239 words)

 News -> Breeding -> KWPN -> 2003 -> Pion Passed Away
Yesterday evening, the white sire Pion, one of the foundation stallion of the KWPN Dutch Warmblood Society, passed away in his stall at Joop van Uytert's stallion station.
Bred by Mrs L. Geertzema, Pion was by Abgar xx out of an Epigoon dam.
Pion sired a large collection of licensed sons and successful sport horses.
www.eurodressage.com /news/breeding/kwpn/2003/pion.html   (198 words)

 Pion coiff√©: Facts and details from Encyclopedia Topic   (Site not responding. Last check: 2007-10-26)
In chess, the endgame (or end game or ending) refers to the stage of the game when there are few pieces left on the board....
Carrera considered pion coiffé to be about equivalent of giving odds of a queen[For more, click on this link].
Capablanca chess is a variation on the game of chess that exists in several versions played on a board of either 10x10 or 10x8 squares....
www.absoluteastronomy.com /encyclopedia/P/Pi/Pion_coiff%e9.htm   (611 words)

 pion on Encyclopedia.com
CB Richard Ellis.(Boards)(Jeff Pion named to board and as chair of the brokerage operations advisory...
PION [pion] or pi meson, lightest of the meson family of elementary particles.
Radiation therapy: beyond x-rays; while by no means a 'miracle cure,' neurons, pions and ions show promise in therapy for several kinds of cancer.
www.encyclopedia.com /html/p1/pion.asp   (389 words)

Claude Francois Pion (born March 19, 1817 in Beveuge, France and the 8th child)(died May 5, 1888 in Huntertown) and Anne-Marguerite Pequignot (born February 23, 1819 in Gouhenans, France)(died 1851 on board the ship in childbirth) got married in the year 1850.
Florentine Frank Pion was born 1852 in Huntertown and is buried in the Huntertown Cemetery.
Pion was a native of Perry Township, living his entire life in that township.
www.huntertownhistoricalsoc.org /families/pion.htm   (1132 words)

 Ira Pion M.D.
Pion IA; Rigel DS; Garfinkel L; Silverman MK; Kopf AW."Occupation and the risk of malignant melanoma".
Pion IA; Bystryn JC."Expression of toxic epidermal necrolysis in grafted skin is donor-site dominant [Letter]".
Kvedar JC; Pion IA; Bilodeau EB; Baden HP; Greco MA."Detection of substrates of keratinocyte transglutaminase in vitro and in vivo using a monoclonal antibody to dansylcadaverine".
www.med.nyu.edu /pubs/pioni01.html   (171 words)

 PT and the Graph and Pion's Electric Polarizability
represent pion's response to an external electric or magnetic field and reveal the internal structure of the pion.
Pion's polarizability could be observed directly in a pion-Compton scattering experiment, but, in the absence of free pion targets, such experiments are difficult and indirect.
The authors noted that background contributions unrelated to the pion polarizability dominate the photoproduction amplitude.
www.pa.uky.edu /~sugata/phd/node14.html   (425 words)

 pion - Search Results - MSN Encarta
main discussion, Meson, as example of meson, creation of pions from cosmic ray collisions, discovered by Cecil F. Powell, elementary particles,...
Pions are the lightest mesons, because the quarks that compose pions, the up and down quarks, have the smallest masses.
antineutron, antiproton, antiquark, baryon, boson, electron, fermion, hadron, kaon, lepton, meson, muon, neutrino, neutron, photon, pion, positron,...
ca.encarta.msn.com /pion.html   (88 words)

 Pion Mass Measurement
An improvement in the measurement of the pion mass, by a factor of 3, makes it possible to determine the upper limit of the muon neutrino mass with a sensitivity of around 70 keV/c
Negatively charged pions will be extracted from the low momentum pion beam in the (PI)E5 area at PSI and injected into the cyclotron trap [4].
The momentum of the incoming pions is degraded by radial foils and wedges, which then take a spiral path into a gas filled target chamber at the centre of the trap.
www.src.le.ac.uk /projects/pion_mass   (855 words)

Sammen med partnere kan Pion tilby et bredt spekter av tjenester i tillegg til grafisk design; bla.publiseringsverkt√ły, brukervennlighet, foto, synlighet og trykkeritjenester.
Pion kan formidle kontakt med fotografer og skribenter.
I tillegg har Pion en stor bildedatabase som kundene kan benytte seg av.
www.pion.no   (89 words)

 Becker College Athletics - Basketball
Beth Pion - Recorded a double-double vs. Fisher in the Hawks 53-46 victory.
Beth Pion - Averaged 18 points, 2.5 assists, 3.5 blocked shots and 3 steals per game which includes her 18 rebounds vs. Bay Path.
Beth Pion - The freshman averaged 24.6 points, 11.3 rebounds, 3.6 steals and 7 blocked shots in a 2-1 week for the Hawks.
www.beckercollege.edu /athletics/sports/wbasketball.htm   (242 words)

 Ontario Pioneer Camp - Summer 2007
Not only do we run exceptional camping programs for kids all summer long, but we also hos...
At Pioneer we strive to provide the best experience possible for our campers.
August 26th - September 1st (Ages 14-17 Co-ed) Are you looking for an awesome way to finish your summe...
www.pioneercamp.ca   (95 words)

 Pion Trigger
There was also a pion trigger that allows a sample of the pions to be taken in order to study the pion background.
The raw PION signal was defined as a good hodoscope trigger (SCIN) vetoed by the CER signal (note that this is not mutually exclusive with the electron trigger).
This PION trigger was prescaled using a dynamic prescaling circuit, and the prescaled pion triggers, PIPRE, were ORed with the ELREAL signal to give the final HMS or SOS singles trigger.
www.krl.caltech.edu /~johna/thesis/node39.html   (350 words)

 One Pion Exchange Potential.
In the extreme low energy limit, we would expect that the long-range part of the potential between nucleons is dominated by the exchange of the lightest strongly interacting particle (as we are requiring all interactions are local), which we know to be the pion.
In these models, which have many free parameters fit to reproduce nucleon-nucleon scattering, the singular part of the pion potential is "renormalized away" by the fitting of the heavy meson parameters.
The central part of the potential induced by pion exchange (preserves angular momentum by definition) depends on the spin and isospin channel.
www.phys.washington.edu /users/savage/Class_560/lec560_3/node2.html   (989 words)

 Citebase - Pion and Kaon Polarizabilities at CERN COMPASS
The electric alpha and magnetic beta pion Compton polarizabilities characterize the pion's deformation in the electromagnetic field of the gamma during gamma-pi Compton scattering.
The pion polarizabilities are determined by their effect on the shape of the measured gamma-pi Compton scattering angular distribution.
The polarizability of a charged pion is estimated in the framework of the nonlocal chiral quark model of the Nambu--Jona-Lasinio type.
citebase.eprints.org /cgi-bin/citations?id=oai:arXiv.org:hep-ex/0301024   (1410 words)

 Introduction Pion Beta Experiment
The pion beta decay is one of the most fundamental weak interaction processes.
The analysis of nuclear beta decay involves nuclear corrections which are uncertain at the level of a few tenth of a percent.
The most recent and precise determination of the pion beta decay rate was carried out by McFarlane et al.
pibeta.phys.virginia.edu /intro   (460 words)

 PION   (Site not responding. Last check: 2007-10-26)
PION is a reasoner/system which can return meaningful answers to queries on inconsistent ontologies.
PION is powered by XDIG, an extended DIG Decription Logic Interface for Prolog, in particular, for SWI-Prolog.
PION supports TELL requests both in DIG and in OWL, and ASK requests in DIG.
wasp.cs.vu.nl /sekt/pion   (157 words)

 [No title]
The absolute cross section of pion photoproduction from high Z nuclei at small angles can be measured using this facility.
The conceptual PrimEx Setup in Hall B. The TJNAF Beam Photon Tagger The Thomas Jefferson National Accelerator Facility is capable of delivering an electron beam of nearly 6 GeV.
The colder the lead tungstate is, the higher the light yield per shower and a temperature of 5 oC is near optimal.
www-unix.oit.umass.edu /~madpiper/PhDProposal.doc   (2171 words)

 Amazon.com: Cats for Dummies: Books: Gina Spadafori,Paul D. Pion,Dr. Paul D. Pion,Lilian Jackson Braun   (Site not responding. Last check: 2007-10-26)
While size and in-bred behaviors don't vary in cats as much as they do in dogs, different breeds of cats do have distinctive traits and temperaments that should be considered when deciding on a purebred animal.
The authors are frank in their discussion of the fate of poorly chosen cats who wind up in shelters because they were too much work and not right for the person who had selected them.
Pion is a renowned veterinary cardiologist and cofounder and president of the largest online veterinary information network in the United States.
www.amazon.com /exec/obidos/tg/detail/-/0764552759?v=glance   (2289 words)

 Perseus Site: Ephesos
Ephesos was originally established at the base of Mount Pion, on a natural harbor at the delta of the Cayster river.
Hellenistic Ephesos was planned on a grid system at the W base of Mt. Pion and in the narrow valley S of Mt. Pion and NW of Mt. Koressos.
On the lower NE slope of Mt. Pion, beyond the city walls, are a rustic sanctuary of the Mother Goddess and the Christian shrine of the Seven Sleepers.
www.perseus.tufts.edu /cgi-bin/siteindex?entry=Ephesos   (2914 words)

 Nucleon-Pion Lagrangian   (Site not responding. Last check: 2007-10-26)
And as usual, we do that by writing a local function of fields that is invariant with respect to all conserved symmetries.
When we have the nucleon and pion fields at our disposal, and we want to construct the Lorentz and chiral invariant Lagrangian density, the answer is:
Suffice to say, that the OPE potential appears as naturally from exchanging pions, as the Coulomb potential appears from exchanging photons via the electron-photon coupling term in Eq.
www.fuw.edu.pl /~dobaczew/maub-42w/node14.html   (709 words)

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