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2 edition of 20 GeV charm photoproduction found in the catalog.

20 GeV charm photoproduction

Duncan A. Waide

20 GeV charm photoproduction

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  • 39 Currently reading

Published by University of Birmingham in Birmingham .
Written in English


Edition Notes

Thesis (Ph.D.) - University of Birmingham, Dept of Physics.

Statementby Duncan A. Waide.
ID Numbers
Open LibraryOL13869833M

Photoproduction of π0π0 on proton and The copious production of charm quarks at HERA has yielded a detailed understanding of QCD dynamics, the only measure of the charm contribution to the proton structure, as well H= ± suredsignalyield,whichisacrosssection. First, the background is fitted alone from to GeV /c 2 while excluding the Ξ () 0 mass region from to GeV /c 2. Second, a combined fit for signal and background is performed over the full range with the background polynomial fixed to the results from the first fit stage; a Voigtian function—a convolution of Breit Author: B. Abelev, J. Adam, D. Adamová, M. M. Aggarwal, G. Aglieri Rinella, M. Agnello, A. Agostinelli, N. A. Anselm G. Vossen Assistant Professor of Physics. In Quantum Chromodynamics (QCD), the theory of the strong interactions, the nucleon emerges as a strongly interacting, relativistic bound state of almost massless quarks and gluons. Fifty years of experimental investigations into the nucleon's internal structure have provided remarkable insight. A narrow pentaquark state, Pc()+, decaying to J/ψp, is discovered with a statistical significance of σ in a data sample of Λb0→J/ψpK- decays, which is an order of magnitude larger than that previously analyzed by the LHCb Collaboration. The Pc()+ pentaquark structure formerly reported by LHCb is confirmed and observed to consist of two narrow overlapping peaks, Pc()+ and Cited by:


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20 GeV charm photoproduction by Duncan A. Waide Download PDF EPUB FB2

@article{osti_, title = {Charmed-particle photoproduction cross section at 20 GeV/c}, author = {Kent, J.C.}, abstractNote = {The charmed-particle photoproduction cross section at 20 GeV/c has been measured using data from the BC72/73 experiment at the SLAC Hybrid Facility.

A 1-meter rapid-cycling hydrogen bubble chamber was exposed to a 20 GeV charm photoproduction book GeV/c backscattered photon beam. Charm Photoproduction Cross Section at 20 GeV Article (PDF Available) in Physical Review Letters 51(3) July with 71 Reads How we measure 'reads'.

abe k, bacon tc, ballam j, berny l, bevan av, bingham hh et al. charm photoproduction cross-section at 20 gev. Physical Review Letters. ;51(3) Author. The inclusive charm cross section at a photon energy of 20 GeV has been measured to be 56/sub -/23/sup +24/ nb.

Evidence is presented for a non-DD-bar component to more» charm production, consistent with (35 +- 20)%./sub c//sup +/ production and. Inclusive photoproduction of neutral strange particles at 20 GeV Article (PDF Available) in Physical review D: Particles and fields 29(9) May with 35 Reads How we measure 'reads'.

This is a list of past and current experiments at the CERN Super Proton Synchrotron (SPS) facility since its commissioning in The SPS was used as the main particle collider for many experiments, and has been adapted to various purpose ever since its inception.

Four locations were used for experiments, the North Area (NA experiments), West Area (WA experiments), Underground Area (UA. Our view is supported by ZEUS measurements of the charm structure function F c 2 (x,Q 2), which already displays a strong rise with increasing 1/x even at small Q 2.

Fig. 1 shows the data at Q 2 = GeV 2; the lines are the conventional fit to the data (MRST) and our own calculation. Indeed, HERA data for photoproduction and electroproduction of charm have the striking property that at each Cited by: The Electron Ion Collider photon nucleon fragments incident lepton proton gluon anti-quark quark virtual photon hadron pair open charm hidden charm} nucleon fragments γ* DISCLAIMER This report was prepared as an account of work sponsored by an agency of the at Q2 = 20 (GeV/c) 25 Figure The Gluon Momentum Distribution x G (x.

charm photoproduction cross-section at 20 gev abe, k., bacon, tc., ballam, j., berny, l., bevan, av., bingham, hh., brau, je., braune, k., brick, d., bugg, wm.

Abstract. Recent measurements are reviewed of the spin structure functions g 2 p and g 2 d measured at SLAC over the kinematic range ≤ x ≤ and ≤ Q 2 ≤ 20 (GeV/c) 2, made by scattering and GeV longitudinally polarized electrons from transversely polarized NH 3 and 6 LiDtargets.

The future SLAC program includes an experiment (E) to measure ΔG(x) through Author: P. Bosted. 0 5 10 15 20 25 30 35 xg(x) x MRST Q^2=8 MRSG DL CTEQ6M Figure 3: Various gluon structure functions[15] at Q2 = 8 GeV2 At low Q2, and particularly for photoproduction, the magnitude of the cross section is sensitive to the value chosen for ng mc by MeV away from our preferred value of GeV changes the photoproduction cross section by more than 20% at.

ALL REJOICE IN SLAC'S NOBEL PRIZE by Bill Kirk co-winners are the year veterans who are listed on this and the preceding page. One more thing: In going through the Picture Book, I ran across many pictures of people who for one study charm photoproduction at GeV.

Greg was invited to come to. If we include 4 flavours of quark and 20 GeV charm photoproduction book in the sum in, then at Q 2 =20 GeV 2 the singlet quark distribution x∑ f (q f + q ̄ f)∼x −ϵ 0 at sufficiently small found also that the charmed-quark component F 2 c of F 2 is apparently governed almost entirely by hard-pomeron exchange at small x, even at small values of Q 2, and that, within the experimental errors, its Cited by: used (3) multiplied by (1 x)n with n = 5; changing n by one unit changes the charm photoproduction cross section by less than 15% at W = 10 GeV and by 1% or less when W > 50 GeV.

At low Q2, and particularly for photoproduction, the magnitude of the cross section is. The blue enhancement near 20 GeV 2 shows the contribution from the Z() − tetraquark candidate to the total decay rate, given by the solid red line.

(right) The data points show the variation of the Z () − decay rate in the Argand plane, displaying the characteristic circular behaviour of a resonance. The Advanced Research Workshop on QeD Hard Hadronic Processes was held on October at Hotel on the Cay, St.

Croix, U. Virgin Islands. The underlying theme of the workshop, the first in a series, was an examination, both theoretical and Author: Bradley Cox. by less than 15% at W= 10 GeV and by 1% or less when W>50 GeV.

At low Q2, and particularly for photoproduction, the magnitude of the cross section is sensitive to the value chosen for mc. Changing mcby MeV away from our preferred value of GeV changes the photoproduction cross section by more than 20% at.

CLEO was a general purpose particle detector at the Cornell Electron Storage Ring (CESR), and the name of the collaboration of physicists who operated the detector. The name CLEO is not an acronym; it is short for Cleopatra and was chosen to go with CESR (pronounced Caesar).

CESR was a particle accelerator designed to collide electrons and positrons at a center-of-mass energy of approximately. The Paperback of the The Search for Charm, Beauty, and Truth at High Energies by Gianpaolo Bellini, S.C.

Ting | at Barnes & Noble. FREE Shipping on Due to COVID, orders may be delayed. (GeV) (b) 1 10 40 11 1 10 40 18 1 10 40 30 W (GeV) (b) 1 10 40 60 1 10 40 Figure 1: ZEUS data[8] for the charm structure function Fc 2(x,Q2) and the charm photoproduction cross section, with the prediction from the fit [4] to F 2(x,Q2) assuming that the hard-pomeron is flavour.

The new requirement was to deliver the extracted GeV protons to the Meson, Proton, and Muon Laboratories. This led to the development of the strings of superconducting magnets and their associated cryogenic plants, known as the left, right and muon bends.

E was designed to study the neutron production and properties of charm particles. E featured a novel, high resolution MWPC called the D5 to enable the experiment to tag charm particles through their very short, but finite lifetime. The D5 was a precursor to much finer pitched microstrip detectors which emerged in the next generation of charm experiments a few years later and.

The Fermilab photoproduction experiment E used tagged photons of energy 80– GeV, and recorded 10 8 events from which 10 4 charm events were reconstructed. The beam for CERN hadroproduction experiment NA was GeV/c : M.

Witherell. Charm and Beauty Production: Bottom Production at HERA (M Turcato) Heavy Flavour Production in Two-Photon Interactions (V P Andreev) Total Cross-sections and Diffraction: Impact Factors of Virtual Photons at NLO (V S Fadin) Double-Tag Events in Two-Photon Collisions (C H Lin) Resonances and Exclusive Channels.

Description; Chapters; Supplementary; The proceedings of DIS present the most updated status of deep inelastic scattering (DIS) physics. Topics like structure function measurements and phenomenology, QCD studies in DIS and photoproduction, spin physics and diffractive interactions are reviewed in detail, with emphasis on those studies that push the test of QCD and the Standard.

After Emma is asked to cheat on the final exam by the most popular guy in school, she's given a magical necklace that grants her three chances to see the consequences of her : Comedy.

Extrapolating outside this region, assuming a mass of the charm quark of GeV, we estimate the ep charm cross section to be ( ± −+) μb at GeV and W = GeV.

10 GeV is sufficient to suppress rather significantly expansion effects. Hence one can use energies above ~10 GeV to study other aspects of the dynamics Glauber level transparency for GeV a problem for all models as 24 GeV2≤s’≤ 30 GeV2 since it is too broad for a resonance of for.

The Table of Contents for the book is as follows: * VOLUME I * Foreword * Conference Organization * Welcome Address * PLENARY SESSIONS * Pl New Results in Spectroscopy * New Results in Spectroscopy * Pl Soft Interactions and Diffraction Phenomena * Soft Interactions and Diffraction Phenomena * Pl Spin Structure of the Nucleon * Spin Structure of the Nucleon * Pl QCD.

I=1 shown, dashed = expected GlueX regime (ALL mesons in this range) New band of meson excitations predicted, starting at ca. GeV. Flavor nonets x 8 JPC = 72 states. Includes 0+- 1-+ and 2+- JPC-exotics.

(Light) Hybrids: Open-charm strong decays: 3P0 decay model (Orsay group, s) qq pair production with vacuum quantum numbers. Book Depository Books With Free Delivery Worldwide: Box Office Mojo Find Movie Box Office Data: ComiXology Thousands of Digital Comics: CreateSpace Indie Print Publishing Made Easy: DPReview Digital Photography: East Dane Designer Men's Fashion: Fabric Sewing, Quilting & Knitting: Goodreads Book reviews & recommendations: IMDb Movies, TV.

The Table of Contents for the book is as follows: * VOLUME I * Foreword * Conference Organization * PLENARY SESSIONS * Pl Recent Results from the Super-Kamiokande * Recent Results from the Super-Kamiokande * Pl Recent Results on Neutrino Oscillations * Recent Results on Neutrino Oscillations * Pl Experimental Status of the Standard Model * Author: Alan Astbury, David Axen, Jacob Robinson.

ISBN: OCLC Number: Description: xv, pages: illustrations ; 23 cm: Contents: A. Kira --H. Toki --History and New Ideas for Exotic Particles / H.J.

Lipkin --Chiral Symmetry and Pentaquarks / D. Diakonov --Experiments --Study of the [Theta superscript +] at LEPS / T. Nakano --X() and Other Spectroscopy Results from Belle / K.

Abe --Search for Exotic. We present a study of D0 mixing using events of the type D*+→π+D0, with D0→K+π− and D0→K+π−π+π−. The decay time is used to separate mixing from doubly Cabibbo-suppressed decays.

We observe no evidence for mixing in either mode. Combining the results from the two decay modes, we find rM= ± or rM. Up to 30 GeV e- beam. GeV pbeam. Spin-Rotator. 10 mrad, with crab crossing.

L=xcm-2s-1, T/m gradient. Sn T/m. Star detector ©Dejan Trbojevic. GeV pbeam. Exploit LARP development of Nb. Sn SC quads with.

the energy range10–20 GeV. To make their scaled-up version of the Cosmotron, the group need- Charm Decays –81 E 20 70 –85 E 10, photoproduction experiment with Al Wattenberg.

After a postdoc at MIT working on a Fermilab neutrino. “Open charm yields in d+Au collisions at √S NN = GeV”, The STAR Collaboration, Phys. Phys. Rev. Lett. 94 () ; e-Print Archives (nucl-ex/). “Measurements of transverse energy distributions in Au+Au collisions at √S NN = GeV”, The STAR Collaboration, Phys.

Rev. C 70 ()e-Print Archives (nucl-ex. Photoproduction of D *+/-Mesons Associated with a Leading Neutron DESY hep-ex/ Spires: UCL Search for contact interaction, large extra dimensions and finite quark radius in ep collisions at HERA DESY hep-ex/ Spires High Q2 Neutral Current Cross Sections in e+p DIS at root(s)= GeV DESY hep-ex/ gev physics quantum universe gauge data inflation states terms standard lett symmetry neutrino rev density models susy particle matrix string theory planck coupling You can write a book review and share your experiences.

Other. Talk at the Joint INT/Jefferson Lab Workshop on Exclusive and Semi-exclusive Processes at High Momentum Transfer (20 May ) Transparencies [html, Postscript] LANL Preprint hep-ex/ (DESYBN-HEP)[abs, src, ps, other] Recent Results from Decay-Angle Analyses of Rho^0 Photoproduction at High Momentum Transfer from ZEUS.

The deviations from the data show a maximum for p T ∼ GeV/ c and are more pronounced for kaons and protons than for pions. All the tested Monte-Carlo generators underestimate the kaon yield by about 20–30 % for p T > MeV/ c, while for p T Cited by: For Publisher’s use CHARMED BARYONS PHOTOPRODUCED IN FOCUS AT FERMILAB SERGIO P.

RATTI Dip. di Fisica Nucleare and Sezione I.N.F.N. I Pavia (Italy) E-mail: [email protected] FOCUS collected over 7 triggers and more than fully reconstructed charm particles in a photoproduction experiment at Fermilab.

The experimental setup is an up. Directed by Letia Clouston. With Carlo Marks, Lexi Giovagnoli, Noelle Perris, Michelle Glavan. Emma, the studious editor of the school paper, is tempted by the most popular boy in school, Chris Duval, to cheat. She is given a magical necklace that will give her 3 chances/10(3).