Download or read book Measurement of R and Determination of the Charged particle Multiplicity in E e Annihilation at square Root Of S Around 10 GeV written by ARGUS Collaboration and published by . This book was released on 1991 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of R and Determination of the Charged particle Multiplicity in E E Annihilation at radical s Around 10 GeV written by and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of R and determination of the charged particle multiplicity in e e 346 annihilation at s around 10 GeV written by and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Total and Inclusive Hadron Production by Ee Annihilation at square Root Symbol S written by James Fraser Patrick and published by . This book was released on 1982 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Multiplicity Distributions in Ee Annihilation at 29 GeV written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper presents the charged particle multiplicity distributions of ee− annihilation at .sqrt. s = 29 GeV measured in the High Resolution Spectrometer. The data, which corresponds to an integrated luminosity of 185 pb−1, were obtained at the ee− storage ring PEP. The multiplicity distribution of the charged particles has a mean value n = 12.87 +- 0.03 +- 0.30, a dispersion D2 = 3.67 +- 0.02 +- 0.18, and an f2 momentum of 0.60 +- 0.02 +- 0.18. Results are also presented for a two-jet sample selected with low sphericity and aplanarity. The charged particle distributions are almost Poissonian and narrower than results reported by other e+e− experiments in this energy range. The mean multiplicity increases with the event sphericity and for the sample of three-fold-symmetric three-jet events, a value of n = 16.3 +- 0.3 +- 0.7 is found. No correlation is observed between the multiplicities in the two hemispheres when the events are divided into two jets by a plane perpendicular to the thrust axis. For the single jets, a mean multiplicity of n = 6.43 +- 0.02 +- 0.15 and dispersion value of D2 = 2.55 +- 0.02 +- 0.13 are found. These values give further support to the idea of independent jet fragmentation. 20 refs., 13 figs.

Download or read book Measurement of R in E E Annihilation for s Between 7 4 and 9 4 GeV written by and published by . This book was released on 1982 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Multiplicity Distributions in Ee Annihilation at 29 GeV written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The charged particle multiplicity distributions for single jets in ee− annihilation at 29 GeV have been measured using the High Resolution Spectrometer at PEP. The shape of the distribution agrees well with a Poisson distribution. No correlation is observed between the multiplicities in the two jets of an event. For fixed values of the prong number of the total event, the multiplicity sharing between the two jets is in good agreement with a binomial distribution. These observations are contrasted to the results from soft hadronic collisions and conclusions are drawn about the nature of clusters. 21 refs., 4 figs.

Download or read book Measurement of pi 0 and eta Meson Production in E e Annihilation at square Root of S Near 10 GeV written by CRYSTAL BALL Collaboration and published by . This book was released on 1990 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book D Meson Production in E e Annihilation written by Petros-Afentoulis Rapidis and published by . This book was released on 1979 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Charged Particle Multiplicities in Electron positron Annihilation at Center of mass Energies from 50 to 61 4 GeV written by Hong Wei Zheng and published by . This book was released on 1990 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Inclusive Production of Vector Mesons in Ee Annihilation At Sqrt S written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes the measurement of multiplicities and differential cross-sections of the [rho]°, K*°, and [phi] in ee− annihilation at .sqrt.s = 29 GeV, using data collected by the TPC/2.gamma. Detector Facility at PEP. The number of vector mesons per event is determined to be N(/rho/°) = 0.77 +- 0.08 +- 0.15, N(K*° + /bar K/*°) = 0.58 +- 0.05 +- 0.11, and N(/phi/) = 0.076 +- 0.010 +- 0.012. These multiplicities are used to find that the ratio of strange quarks to up quarks produced in the hadronization process is 0.30 +- 0.07, and that the ratio of light vector mesons to all light mesons produced in the hadronization process is 0.45 +- 0.08. All results agree with previous measurements. Measurements are compared with predictions of the Lund and Webber hadronization models, neither model is particularly favored nor disfavored. 60 refs., 32 figs., 24 tabs.

Download or read book Properties of Ee Interactions At Sqrt S written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Bhabha scattering and multi-hadronic ee− annihilation events have been observed in the AMY detector at .sqrt.s = 50 GeV and .sqrt.s = 52 GeV at the TRISTAN ee− storage ring. Here we report the results of a preliminary analysis of the properties of these events. We present results for the e+e− .-->. e+e−, e+e− .-->. .gamma gamma. and e+e− .-->. .mu.+.mu.− differential cross sections as well as for R, the ratio of e+e− annihilation into hadrons to that for dimuons. In addition we present results on the characteristics of the final state hadrons in the annihilation events.

Download or read book Production of Eta Mesons in Ee Annihilations At Sqrt S written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Data from ee− annihilations at 29 GeV have been used to measure the production and fragmentation of eta mesons. The signal is observed in the eta .-->. .gamma gamma. decay channel. The fragmentation function for p/sub eta/> 1.5 GeV/c agrees well with the shapes predicted by both the Lund and Webber models. However, the mean multiplicity is measured to be = 0.37 +- 0.08 eta mesons per hadronic annihilation event, which is significantly lower than the values predicted by either model. 6 refs., 2 figs., 1 tab.

Download or read book Particle Production in Ee Annihilation at 29 GeV written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent results on particle production in ee− annihilation at 29 GeV are reviewed. The data were obtained using the High Resolution Spectrometer at PEP and correspond to an integrated luminosity of 300 pb−1. The mean charged particle multiplicity in gluon jets from the three-jet events is found not to differ from that measured for quark jets. The production of the scalar meson S(975) and the tensor mesons f°(1270) and K*(1430) are observed and the rates are compared to the previously observed vector mesons, rho and K*(890). Finally, some of the global properties of charged particle production are presented and compared with similar results from soft hadronic collisions. 16 refs., 7 figs.

Download or read book Determination of Alpha sub S from Energy energy Correlations in Ee Annihilation at 29 GeV written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We have studied the energy-energy correlation in ee− annihilation into hadrons at .sqrt.s = 29 GeV using the Mark II detector at PEP. We find to O(.cap alpha./sub s/2) that .cap alpha./sub s/ = 0.158 +- 003 +- 008 if hadronization is described by string fragmentation. Independent fragmentation schemes give .cap alpha./sub s/ = .10 - 14, and give poor agreement with the data. A leading-log shower fragmentation model is found to describe the data well.

Download or read book MEASUREMENT OF THE CHARGED PARTICLE MULTIPLICITY IN Pp COLLISIONS AT 102 GeV c written by and published by . This book was released on 1972 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Charged Particle Multiplicities at Brahms written by and published by . This book was released on 2001 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the measurement of charged particle multiplicity densities dN/d[eta] in ultrarelativistic heavy ion collisions as function of [eta] and the centrality of the collisions. This distributions were extracted from data collected by the BRAHMS collaboration during the first RHK run with gold ions at √s{sub NN} = 130A · GeV. The analysis method is described and, results are compared to some model predictions.