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A Measurement Of The B Quark Fragmentation Function At Square Rootq2
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Book Synopsis A Measurement of the B Quark Fragmentation Function at (square Root)Q2 by :
Download or read book A Measurement of the B Quark Fragmentation Function at (square Root)Q2 written by and published by . This book was released on 1996 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presented here is a measurement of the b quark fragmentation function D{sub b}(X), taken from a sample of 504 semi-leptonic B decays which were selected from the 150,000 Z° decays collected between 1993 and 1995 at the SLD at SLAC. The energy of each tagged B hadron is reconstructed using missing jet energy, based on the information from the lepton and a partially-reconstructed charm-decay vertex. Account is taken of the effect of primary orbitally excited mesons (B**s). An iterative unfolding procedure is used which serves to effectively extract the true fragmentation function from the reconstructed B energy spectrum. The final result is shown to be compatible with many theoretical models. A comparison is made with other b fragmentation function measurements at 45.6 GeV, and this measurement is shown to be consistent with those results. The average scaled energy is found to be (x{sub E}) = 0.697" 0.017(stat) " 0.034(sys).
Book Synopsis Measurement of the B Quark Fragmentation Function in Z0 Decays by : Danning Dong
Download or read book Measurement of the B Quark Fragmentation Function in Z0 Decays written by Danning Dong and published by . This book was released on 2000 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Measurement of the [beta] Quark Fragmentation Function at [square Root Of]Q2 by : Eric Decker Church
Download or read book A Measurement of the [beta] Quark Fragmentation Function at [square Root Of]Q2 written by Eric Decker Church and published by . This book was released on 1996 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 私のサマーセーター独習帖 written by and published by . This book was released on 1989 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Preliminary Measurement of the B Quark Fragmentation Function in Hadronic Z° Decays by :
Download or read book A Preliminary Measurement of the B Quark Fragmentation Function in Hadronic Z° Decays written by and published by . This book was released on 1996 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a measurement of the {ital b} quark fragmentation function from a sample of semi-leptonic {bold B} decays collected between 1993 and 1995 in the SLD experiment at SLAC. The energy of each tagged {bold B} hadron was reconstructed using information from the lepton and a partially reconstructed charm decay vertex. A comparison of the scaled energy distribution with several phenomenological models of heavy quark fragmentation was made, using the same model in each case to correct the data. The average scaled energy was found to be {l_angle}[chi]{sub E}{r_angle} = 0.697±0.012({ital stat}){sup +0. 028}{sub -0.024} ({ital syst})(preliminary).
Book Synopsis The B Quark Fragmentation Function, From LEP to TeVatron by :
Download or read book The B Quark Fragmentation Function, From LEP to TeVatron written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract Not Provided.
Book Synopsis A Measurement of B-quark Fragmentation Fractions in P¢p Collisions at [centre of Mass Energy] by : Wendy Jane Taylor
Download or read book A Measurement of B-quark Fragmentation Fractions in P¢p Collisions at [centre of Mass Energy] written by Wendy Jane Taylor and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fragmentation is the process by which quarks and gluons organize themselves into hadrons. The fragmentation properties of the bottom quark cannot be predicted from fundamental principles and hence must be determined empirically. We investigate one such property, namely the flavour dependence of the fragmentation process for bottom quarks produced in 1.8-TeV proton-antiproton collisions. This flavour dependence is investigated by determining the 'B'-hadron production ratios. We use a sample of pp data corresponding to an integrated luminosity of 110 pb-1 and reconstruct the following semileptonic 'B'-hadron decays into electrons and charmed hadrons: B+[right arrow]e+neD 0X,hsp sp="0.265"B0[right arrow]e+n eD*-X , B0[right arrow]e+neD- X,hsp sp="0.265"B0s[right arrow]e +neD-s X and L0b [right arrow]e+neL- cX . With these data, we measure the ratios of fragmentation fractions fd/fuvmk id="vm1"=88± 21%, fs/fu+fdvmkr rid="vm1"= 21.5±7.1%hsp sp="0.265"and fbaryon/fu+fd vmkr rid="vm1"=12.0±4.2%. Assuming that these four hadrons saturate production of weakly-decaying ' B' hadrons, that is, that fu+fd+fs+fbaryon 1 , we determine fuvmk id="vm1"=39.8±5.4 %, fdvmkr rid="vm1"=35.2±4.8 %, fsvmkr rid="vm1"=16.1±4.5 %hsp sp="0.265"and fbaryonvmkr rid="vm1"=9.0± 2.9%. These results represent the first measurement of all four 'b'-quark fragmentation fractions in a single experiment. These fractions are in agreement both with previous phenomenological interpretations and with other experimental measurements.
Book Synopsis Measurement of the Doubly Inclusive B-bbar Quark Fragmentation Function in Z0 Decays and First Measurement of Angle Dependent B-Bbar Energy Correlation by :
Download or read book Measurement of the Doubly Inclusive B-bbar Quark Fragmentation Function in Z0 Decays and First Measurement of Angle Dependent B-Bbar Energy Correlation written by and published by . This book was released on 2002 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present preliminary results of a measurement of the double-inclusive b quark fragmentation function in Z° decays using a novel kinematic B hadron energy reconstruction technique. The measurement is performed using 350,000 hadronic Z° events recorded in the SLD experiment at SLAC between 1996 and 1998. The small and stable SLC beam spot and the CCD-based vertex detector are used to reconstruct topological B-decay vertices with high efficiency and purity, and to provide precise measurements of the kinematic quantities used in this technique. We measure the B energy with good efficiency and resolution over the full kinematic range. We present a preliminary measurement of the angle dependent correlations between the B and {bar B} hadron energies in Z° b{bar b} events, and compare with the leading order QCD predictions.
Author :Wendy Jane Taylor Publisher :National Library of Canada = Bibliothèque nationale du Canada ISBN 13 :9780612413238 Total Pages :123 pages Book Rating :4.4/5 (132 download)
Book Synopsis A Measurement of B-quark Fragmentation Fractions in P̄p Collisions at [centre of Mass Energy] by : Wendy Jane Taylor
Download or read book A Measurement of B-quark Fragmentation Fractions in P̄p Collisions at [centre of Mass Energy] written by Wendy Jane Taylor and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1999 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Measurement of B-quark Fragmentation Fractions in PØp Collisions at [centre of Mass Energy] by :
Download or read book A Measurement of B-quark Fragmentation Fractions in PØp Collisions at [centre of Mass Energy] written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the Relative Fragmentation Fractions of B-bar Hadrons by : Karen Ruth Gibson
Download or read book Measurement of the Relative Fragmentation Fractions of B-bar Hadrons written by Karen Ruth Gibson and published by . This book was released on 2006 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes the first Run II measurement of b quark fragmentation into {bar B}{sup 0}, B{sup -}, and {bar B}{sub s}{sup 0} mesons and {Lambda}{sub b}{sup 0} baryons using semileptonic B decays. The result is based on 360 pb{sup -1} of data collected with the CDF detector in p{bar p} collisions at {radical}s = 1,960 GeV at the Tevatron Collider at Fermilab. The fragmentation fractions are measured for an effective {bar B} hadron p{sub T} threshold of 7 GeV/c to be f{sub u}/f{sub d} = 1.054 {+-} 0.018(stat){sub -0.045}{sup +0.025}(syst) {+-} 0.058(BR), f{sub s}/(f{sub u} + f{sub d}) = 0.160 {+-} 0.005(stat){sub -0.010}{sup +0.011}(syst){sub -0.034}{sup +0.057}(BR), and f{sub {Lambda}{sub b}}/(f{sub u} + f{sub d}) = 0.281 {+-} 0.012(stat){sub -0.056}{sup +0.058}(syst){sub -0.086}{sup +0.128}(BR). f{sub s}/(f{sub u} + f{sub d}) agrees both with previous CDF measurements and the world averages, dominated by the LEP measurements, with {approx} 1{sigma}. However, f{sub {Lambda}{sub b}}/(f{sub u} + f{sub d}) is approximately twice the value which has been measured at LEP and in CDF Run I and disagrees with the LEP results by approximately 2 {sigma}.
Book Synopsis Measurements of Heavy Quark Fragmentation at TRISTAN. by :
Download or read book Measurements of Heavy Quark Fragmentation at TRISTAN. written by and published by . This book was released on 1990 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: The momentum spectrum of muons contained in multihadron ee− annihilation events at an average center-of-mass energy (square root)s = 57.3 GeV is used to study the fragmentation functions for heavy quarks. We obtain average values for the fragmentation variable, x{sub E} = E{sub hadron}/E{sub beam} for the b- and c-quark of {l angle}x{sub E}{r angle}{sub b} = 0.77 (+0.12/-0.11) and {l angle}x{sub E}{r angle}{sub c} = 0.57 (+0.08/-0.10), respectively.
Book Synopsis Measurement of the Ratio of B-quark Production Cross Sections at (square Root)s by :
Download or read book Measurement of the Ratio of B-quark Production Cross Sections at (square Root)s written by and published by . This book was released on 1996 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on a measurement of the ratio of b-quark production cross section in p{ovr p} collisions at (square root)s = 630 GeV and (square root)s = 1800 GeV collected by the Collider Detector at Fermilab. Results are compared to the predictions of next-to-leading order QCD calculations. 16 refs., 4 figs.
Book Synopsis Experimental studies on the heavy quark fragmentation functions by : Siegfried Bethke
Download or read book Experimental studies on the heavy quark fragmentation functions written by Siegfried Bethke and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the Asymmetry of B Quark Production in E+e- Annihilation at [square Root of S] by : TASSO Collaboration
Download or read book Measurement of the Asymmetry of B Quark Production in E+e- Annihilation at [square Root of S] written by TASSO Collaboration and published by . This book was released on 1990 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Precision Measurements of Quark Fragmentation Functions in E + E- -annihilation at Belle by : Dominik Gabbert
Download or read book Precision Measurements of Quark Fragmentation Functions in E + E- -annihilation at Belle written by Dominik Gabbert and published by . This book was released on 2005 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Quark Fragmentation Functions in Hadronic and Deep Inelastic Single Particle Inclusive Processes by :
Download or read book Quark Fragmentation Functions in Hadronic and Deep Inelastic Single Particle Inclusive Processes written by and published by . This book was released on 1974 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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