Download or read book Particle Production at High P Sub Perpendicular in Sup 28 Si A Collisions at 14 6 Ater Dot GeV written by and published by . This book was released on 1992 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Single particle inclusive spectra are presented for particle production in Si+Al and Si+Au reactions at the nucleus-nucleon center-of-mass rapidity for projectiles incident at 14.6 A{center dot}GeV/c. The invariant cross sections are all well described by an exponential dependence in the transverse mass m(up tack). An analysis in terms of different components in p{sub {perpendicular}}2 shows the importance of resonance production and decay as a reaction mechanism at AGS energies.
Download or read book Particle Production at High P sub perpendicular in 28Si A Collisions at 14 6 A centerdot GeV c written by and published by . This book was released on 1992 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Particle Production at High P sub perpendicular in 28Si A Collisions at 14 6 A GeV written by and published by . This book was released on 1992 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Single particle inclusive spectra are presented for particle production in Si+Al and Si+Au reactions at the nucleus-nucleon center-of-mass rapidity for projectiles incident at 14.6 A·GeV/c. The invariant cross sections are all well described by an exponential dependence in the transverse mass m(up tack). An analysis in terms of different components in p{sub {perpendicular}}2 shows the importance of resonance production and decay as a reaction mechanism at AGS energies.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1993 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Particle Production in Si A and P A Collisions at 14 6 Ater Dot GeV c written by and published by . This book was released on 1990 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Particle production ([pi]{sup {plus minus}}, K{sup {plus minus}}, p) has been measured in both Si+A and p+A collisions at 14.6 A{center dot}GeV/c. Comparisons of m{sub t} and dn/dy distributions between p+Be, p+Au and central Si+Au collisions are discussed. 8 refs., 3 figs.
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 1836 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Antiproton Production in 14 6 Ater Dot GeV written by and published by . This book was released on 1990 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Preliminary data are presented for the production of antiprotons and other charged particles produced in minimum bias and central Si + Al and Si + Au collisions measured using the E802 spectrometer at the Brookhaven Alternating Gradient Synchrotron. The antiproton data presented cover the range of transverse momentum from 0.3 to 1.2 GeV/c and lab rapidities from 0.9 to 1.7. The extracted rapidity densities, transverse mass slopes, and particle ratios from minimum bias and central Si + A collisions are compared to those measured in p + p and p + A collisions.
Download or read book Particle Production in P A Collisions at 14 6 GeV written by and published by . This book was released on 1993 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last few years, studies of heavy-ion collisions at high energy have produced new insight into the production of nuclear matter at high baryon density and temperature. While heavy-ion reactions at AGS energy are now well characterized, to clarify and test our understanding of the reaction mechanism of these collisions it is important to study the underlying processes involved. The study of p-A collisions should be particularly useful to understand in which way A-A collisions differ from the simple superposition of nucleon-nucleon collisions and it may be a specially severe test of the validity of the models in describing the transition from a single collision problem to a thermodynamic problem mainly defined by a few observables. In particular, p-A collisions should be sensitive to the way nucleons propagate in the nuclear medium and thus provide more insight on: the importance of rescattering, the stopping power of normal nuclear matter, and possibly on the influence of the nuclear matter density and temperature on the hadronic cross sections. In this paper we present the transverse energy and charged particle multiplicity distributions in proton induced collisions on Al, and Pb targets at 14.6GeV/c. These data have been obtained as part of the E814 collaboration and are thus immediately comparable to similar data obtained for 28Si and Au induced reactions at the same energy.
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1994 with total page 808 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Particle Ratios at High Transverse Momentum in Pp Collisions At Sqrt S written by and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The production of identified charged particles in pp collisions at .sqrt.s = 63 GeV with an identified high p/sub T/ trigger particle emitted in the central region is studied. The measurements were performed at the CERN ISR using the Axial Field Spectrometer. Trigger particle ratios, sigma(.pi./sup + -/)/ sigma(all/sup + -/), sigma(K/sup + -/) and sigma(p/sup + -/)/sigma(all/sup + -/) are presented for p/sub T/ from 5 GeV/c to 8 GeV/c. In addition sigma(.pi./sup + -/)/sigma(all/sup + -/) is presented in the p/sub T/ region from 2.5 GeV/c to 4.5 GeV/c. The charge compensation in the hemisphere containing the trigger particle is shown to depend strongly on the identity of the trigger particle and on the identity of the associated particles. 13 references.
Download or read book J psi Production at High Transverse Momenta in P p and Cu Cu Collisions at Sqrt SNN written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The STAR collaboration at RHIC presents measurements of J/[psi] → e+e− at mid-rapidity and high transverse momentum (p{sub T} > 5 GeV/c) in p+p and central Cu+Cu collisions at √sNN = 200 GeV. The inclusive J/[psi] production cross section for Cu+Cu collisions is found to be consistent at high p{sub T} with the binary collision-scaled cross section for p+p collisions, in contrast to previous measurements at lower p{sub T}, where a suppression of J/[psi] production is observed relative to the expectation from binary scaling. Azimuthal correlations of J/[psi] with charged hadrons in p+p collisions provide an estimate of the contribution of B-meson decays to J/[psi] production of 13% ± 5%.
Download or read book Production of Strange Particles by pi sup p Collisions at 2 08 Gev c written by and published by . This book was released on 1963 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The total cross section 10.72 mb) obtained for the interaction is much higher than that previously observed at 1.39 Bev/c, but SIGMA /sup +/-K/sup +/ production is weaker. Cross sections for the interactions producing strange particles are listed. The SIGMA /sup +/ singular distribution shows a strong backward tendency for the hyperon. The effective mass distributions for pi /sup +/ -- p yields LAMBDA /sup o/ + K/sup +/ + pi /sup o/ indicate a LAMBDA - pi resonance (/sup */) with a mass and width of 1382 plus or minus 4 Mev and 28 Mev. The Y/sup */ decay seems to be independent of the production, andd the andgular distributions of Y/sup */ decay snd production support a spin assignment>1/2. In the SIGMA /sup +/ + K + pi /sup o/ and SIGMA /sup +/ + K/ sup o/ + pi /sup +/ final states, only the 885-Mev K/sup */ could be definitely verified. (D.C.W.).
Download or read book Hadronic Production of J psi at Large chi sub F in 800 GeV P Cu and P Be Collisions written by and published by . This book was released on 1992 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: The differential cross-section d[sigma]/dx[sub F] for J/[psi] production in 800 GeV proton-nucleus collisions has been measured in the kinematic range 0.30 [le] x[sub F] [le] 0.95 and x[sub F] [lt] p[perpendicular] [lt] 5 GeV through the decay mode J/[psi] [yields] [mu][sup +][mu][sup [minus]]. The nuclear dependence of J/[psi] production over this range was measured using copper and beryllium targets. The differential cross sections are in good agreement with the predictions of the symbolical parton duality model. The data show no evidence for an intrinsic charm component in the proton. The ratio of the differential cross sections for copper and beryllium shows a suppression of J/[psi] production in copper which increases with increasing x[sub F].
Download or read book Search for Charmed Particle Production in Proton proton Collisions at the CERN ISR 53 GeV c M written by and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental results on a search for charmed particle production in proton-proton collisions at the center of mass energy (.sqrt.s) of 53 GeV are presented. Evidence of cidences, a signature of charmed particle production, was sought. The inclusive e/.pi. ratio was measured with a magnetic spectrometer located at 32° from Beam 1 of Intersection I6 of the CERN Intersecting Storage Rings (ISR). The e/.pi. ratio from direct (unknown) sources was found to rise from 1.06 x 10−4 at p/sub perpendicular to/ = 1.5 GeV/c to 5.53 x 10−4 at p/sub perpendicular to/ = 0.25 GeV/c. One possible source for this signal is the semi-leptonic decay of charmed particles (e.g., D .-->. K° e.nu.). If so, then electron-strange particle (e.g., .lambda.°, K°) coincidences are expected. The charged decay products of .lambda.° and K° were detected in a multiparticle spectrometer surrounding Beam 1 downstream of the intersection. To determine if there is an electron-strange particle correlation, the number of .lambda.°'s (K°'s) in coincidence with an electron in the 32° spectrometer was compared with the number of .lambda.'s (K°'s) in coincidence with a hadron in the same kinematic range. No evidence for an enhanced production of strange particles with electrons relative to hadrons was found. However, given the acceptance of the apparatus, the absence of a signal is consistent with current models of charmed particle production and decay. 40 references, 51 figures, 20 tables.
Download or read book Charged Particle Production at High Transverse Momentum in 200 GeV c Pp Greek Letter Pi p and Greek Letter Pi p Collisions written by Michael Joseph Medinnis and published by . This book was released on 1980 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Directed Flow and Particle Production in Au Au Collisions from Experiment E877 at the AGS written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this article we summarize recent results on the study of Au+Au collisions at 10.8A GeV/c obtained at the AGS by the E877 Collaboration. New results on the directed sideward flow are presented. In particular, the dependence of proton and pion production on the direction of the reaction plane will be discussed. It is shown that the sideward flow is mainly due to nucleons and that pions show little flow effects. Two-pion correlation functions are studied to derive the density at freeze-out. Further, we inspect the correlations as a function of the pion direction relative to the reaction plane. A dependence of the deduced source sizes on the pair direction and momentum is observed. The measured source sizes are compared to results obtained in lighter systems. Measured m[sub t] spectra of pions and kaons are also presented. The pion spectra show an enhancement at low m[sub t] similar to that observed in Si+Pb and which was attributed to[triangle] resonance excitation. However, in contrast to Si+Pb now a clear difference between the[pi][sup+] and[pi][sup -] spectra is seen. The K[sup+] spectra, which showed a very steep component over a small p[sub t] range in the previously studied Si+Pb reaction exhibit for Au+Au an unexpected structure at very low p[sub t].
Download or read book Kaid shiry zassan written by and published by . This book was released on 1793* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
