Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Preliminary Measurement Of Leading Particle Effects In Hadronic Zsup 0 Decays
Download Preliminary Measurement Of Leading Particle Effects In Hadronic Zsup 0 Decays full books in PDF, epub, and Kindle. Read online Preliminary Measurement Of Leading Particle Effects In Hadronic Zsup 0 Decays ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Preliminary Measurement of Leading Particle Effects in Hadronic Z[sup 0] Decays by :
Download or read book Preliminary Measurement of Leading Particle Effects in Hadronic Z[sup 0] Decays written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present preliminary evidence for leading particle production in hadronic decays of the Z[sup 0] to light quark pairs using 150,000 events recorded in the SLD experiment at SLAC. The highly polarized electron beam produced by the SLC is used to tag quark and antiquark jets, and a signed impact parameter technique is employed to reject heavy flavor events. Charged hadrons are identified in the SLD Cherenkov Ring Imaging Detector (CRID) and[Lambda]/[bar[Lambda]] are reconstructed using their charged decay modes. In a high purity sample of quark jets, the baryon momentum spectrum is harder that that of the antibaryon, and conversely for a sample of antiquark jets, supporting the hypothesis that the faster particles in jets are more likely to carry the primary quark or antiquark from the Z[sup 0] decay. Similarly, more high momentum K[sup -] that K[sup+] are observed in quark jets and conversely for antiquark jets, consistent with the hypothesis that leading K[sup[+-]] are produced predominantly in s[bar s] events rather than[ital u][bar[ital u]] events.
Book Synopsis Preliminary Measurement of Leading Particle Effects in Hadronic Z° Decays by :
Download or read book Preliminary Measurement of Leading Particle Effects in Hadronic Z° Decays written by and published by . This book was released on 1996 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present preliminary evidence for leading particle production in hadronic decays of the Z° to light quark pairs using 150,000 events recorded in the SLD experiment at SLAC. The highly polarized electron beam produced by the SLC is used to tag quark and antiquark jets, and a signed impact parameter technique is employed to reject heavy flavor events. Charged hadrons are identified in the SLD Cherenkov Ring Imaging Detector (CRID) and [Lambda]/{bar {Lambda}} are reconstructed using their charged decay modes. In a high purity sample of quark jets, the baryon momentum spectrum is harder that that of the antibaryon, and conversely for a sample of antiquark jets, supporting the hypothesis that the faster particles in jets are more likely to carry the primary quark or antiquark from the Z° decay. Similarly, more high momentum K− that K are observed in quark jets and conversely for antiquark jets, consistent with the hypothesis that leading K{sup {+-}} are produced predominantly in s{bar s} events rather than {ital u}{bar {ital u}} events.
Book Synopsis Hadron Fragmentation Functions and Leading Particle Effects in Hadronic Z[sup 0] Decays: New Results from SLD. by :
Download or read book Hadron Fragmentation Functions and Leading Particle Effects in Hadronic Z[sup 0] Decays: New Results from SLD. written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors have measured the differential cross sections for the production of[pi][sup[+-]], K[sup[+-]], K[sup 0], K*(892), [phi](1,020), p and[Lambda] in hadronic Z[sup 0] decays and in subsets of flavor-tagged Z[sup 0][yields] light quark (u[anti u], d[anti d], or s[anti s]), Z[sup 0][yields] c[anti c] and Z[sup 0][yields] b[anti b] events. Charged hadrons were identified with the SLD Cherenkov ring imaging detector. The vertex detector was employed to select flavor enriched samples and the polarized electron beam from SLC was used to tag quark and anti-quark jets. The authors observe a flavor dependence in the hadron fragmentation functions. The authors present evidence for leading particle production in hadronic decays of the Z[sup 0] boson to light-flavor jets and a direct measurement of the strangeness suppression factor[gamma][sub s].
Book Synopsis Strange Particle Production in Hadronic Z[sup 0] Decays by :
Download or read book Strange Particle Production in Hadronic Z[sup 0] Decays written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A study has been made of neutral strange baryons and pseudoscalar mesons produced in hadronic decays of the weak gauge boson V. The experiment was performed at the Stanford Linear Accelerator Center, which has the unique capability of colliding highly polarized electrons with unpolarized positrons. Overall production rates and spectra of the K[sup 0] and the[Lambda][sup 0] (+[Lambda][sup 0]) were measured and compared with other experiments as well as with Quantum Chromodynamics calculations. The combination of the small, stable beam spots produced by the SLAC Linear Collider (SLC) and the precision vertexing capabilities of the SLC Large Detector (SLD) permitted the separation of the hadronic events into three quark flavor-enriched samples. An unfolding was performed to obtain flavor-pure samples, and for the first time measurements were made of K[sup 0] and[Lambda][sup 0] (+[Lambda][sup 0]) production rates and spectra in uds, c, and b quark events at the Z[sup 0] pole. This measurement revealed significant production differences. Utilizing the large quark production asymmetry due to the polarized electron beam, high-purity quark and antiquark jet samples were obtained. The first measurement of production differences of the[Lambda][sup 0] baryon in quark and antiquark jets was performed, which provided clear evidence for a leading particle effect at high momenta.
Book Synopsis Properties of Leading Particles in Hadronic Z° Decays by :
Download or read book Properties of Leading Particles in Hadronic Z° Decays written by and published by . This book was released on 1996 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present studies of leading particle production in Z° decays into light, c, and b quarks performed with the SLD experiment at SLAC. The SLD precision vertex detector was exploited to tag light-flavor events, to tag charmed meson vertices and separate the prompt and B-decay components, and to reconstruct B-hadrons partially. The relative production of prompt pseudoscalar and vector D-mesons was measured to be P{sub V} = 0.53 " 0.06(stat.) " 0.02(syst.) (preliminary). The shape of the B-hadron energy spectrum was found to be consistent with the predictions of a number of models, and the average energy fraction was measured to be x{sub E} = 0.697 " 0.012(stat.) " 0.028(syst.) (preliminary). Separation of light quark and antiquark jets was achieved using the highly polarized SLC electron beam, and hadrons were identified using the SLD Cherenkov Ring Imaging Detector. Production of particles and antiparticles in quark jets was compared, allowing the first direct observation of leading particles in ee− --> u{anti u}, d{anti d}, s{anti s} events. More high momentum baryons and K−'s than antibaryons and K's were observed, providing evidence for leading baryon and kaon production, as well as for strangeness suppression at high momentum.
Book Synopsis Strange Particle Production in Hadronic Z° Decays by :
Download or read book Strange Particle Production in Hadronic Z° Decays written by and published by . This book was released on 1996 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study has been made of neutral strange baryons and pseudoscalar mesons produced in hadronic decays of the weak gauge boson V. The experiment was performed at the Stanford Linear Accelerator Center, which has the unique capability of colliding highly polarized electrons with unpolarized positrons. Overall production rates and spectra of the K° and the [Lambda]° (+[Lambda]°) were measured and compared with other experiments as well as with Quantum Chromodynamics calculations. The combination of the small, stable beam spots produced by the SLAC Linear Collider (SLC) and the precision vertexing capabilities of the SLC Large Detector (SLD) permitted the separation of the hadronic events into three quark flavor-enriched samples. An unfolding was performed to obtain flavor-pure samples, and for the first time measurements were made of K° and [Lambda]° (+[Lambda]°) production rates and spectra in uds, c, and b quark events at the Z° pole. This measurement revealed significant production differences. Utilizing the large quark production asymmetry due to the polarized electron beam, high-purity quark and antiquark jet samples were obtained. The first measurement of production differences of the [Lambda]° baryon in quark and antiquark jets was performed, which provided clear evidence for a leading particle effect at high momenta.
Download or read book Graduel de Lyon written by and published by . This book was released on 1780 with total page 739 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Study of K[sub S] [Lambda] and [bar [Lambda] Production in Hadronic Z[sup 0] Decays by :
Download or read book A Study of K[sub S] [Lambda] and [bar [Lambda] Production in Hadronic Z[sup 0] Decays written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a preliminary measurement of the inclusive production rates of K[sub s], A and X hadrons produced in e[sup +]e[sup [minus]] annihilation at the Z[sup 0] pole. The analysis is based upon approximately 50K Z[sup 0] decays collected in the SLD experiment at SLAC in 1993. The observed rates of (K[sub s]) = 1.02 [plus-minus] 0.02 [plus-minus] 0.09 and ([Lambda]) + ([bar [Lambda]]) = 0.38 [plus-minus] 0.01 [plus-minus] 0.04 are consistent with previous measurements. Our differential cross section peak-position results are shown to be consistent with QCD predictions based on the modified leading logarithm approximation and local parton-hadron duality.
Book Synopsis Measurements of Hadronic Decays of Z[sup 0] Bosons by :
Download or read book Measurements of Hadronic Decays of Z[sup 0] Bosons written by and published by . This book was released on 1992 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Z[degrees] bosons have been produced by collisions of longitudinally polarized electrons with unpolarized positrons at the SLAC Linear Collider and their decays have been recorded by the SLD experiment. We present preliminary measurements of the properties of the resulting Z[degrees] decays into multi-hadronic final states. We find good agreement with the predictions of perturbative QCD and fragmentation models.
Book Synopsis Preliminary Measurements of Production Of?{sup {plus_minus}}, K{sup {plus_minus}}, P, K° And?° in Hadronic Z° Decays by :
Download or read book Preliminary Measurements of Production Of?{sup {plus_minus}}, K{sup {plus_minus}}, P, K° And?° in Hadronic Z° Decays written by and published by . This book was released on 1996 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have measured production of?{sup {+-}},?{sup {+-}}, {ital p}/{ital {bar p}},?° and?°/{bar?}° as a function of momentum in inclusive hadronic {ital Z}° decay events and separately in events containing primary light-({ital uds}) and {ital b}-quarks. The SLD Cherenkov Ring Imaging Detector was used to identify charged pions, kaons, and protons over most of the available momentum range 0.8>{ital p}>33 GeV/c. The neutral?°{sub s} and {Lambda}° were reconstructed using the??− and {ital p}?− decay modes, respectively. We present the first comparisons of momentum of charged tracks measured in the SLD Vertex Detector. Substantial differences are observed, consistent with the kinematics of {ital B}-hadron production in Z° decays and the properties of {ital B}-hadron decays as measured at lower energies.
Book Synopsis Preliminary Measurement of the First Hadronic Spectral Moment from Semileptonic B Decays by :
Download or read book Preliminary Measurement of the First Hadronic Spectral Moment from Semileptonic B Decays written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A preliminary determination of the first moment of the hadronic mass distributionM[sub X][sup 2] -[bar m][sub D][sup 2] in semileptonic B decays has been obtained as a function of the minimum lepton momentum, ranging from 0.9 to 1.6 GeV/c. The measurement is based on a new technique involving B[bar B] events in which one fully reconstructed B meson decays hadronically and the recoiling B decays semileptonically. The mass of the hadrons in the semileptonic decay is determined from a kinematic fit to the whole event. For different minimum lepton momenta, the mass distribution is decomposed into contributions from various charm resonant states and a non-resonant contribution, allowing for the determination of the first moment. From these moments the Heavy Quark Effective Theory (HQET) parameters[lambda][sub 1] and[bar[Lambda]] can be derived. For lepton momenta in the B rest frame above 1.5 GeV/c, we find a first moment that is compatible with existing measurements. However, if we extend the measurement to lower values of lepton momenta, the data can only be described by Operator Product Expansion calculations if we use significantly different values for[bar[Lambda]] and[lambda][sub 1] than obtained from earlier measurements based on lepton momentum spectra and the photon spectrum in b[yields] s[gamma] transitions.
Book Synopsis Production of Charged [pi]{sup {+-}}, [Kappa]{sup {+-}} and P/p in Hadronic Z° Decays by :
Download or read book Production of Charged [pi]{sup {+-}}, [Kappa]{sup {+-}} and P/p in Hadronic Z° Decays written by and published by . This book was released on 1999 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have updated our results on identified charged hadron production using the full SLD data sample of 550,000 hadronic Z° decays taken between 1993 and 1998. The SLD Cherenkov Ring Imaging Detector allows the identification of clean samples of charged pions, kaons and protons over a wide momentum range, providing precise tests of perturbative QCD calculations and of fragmentation models. We have studied flavor-inclusive Z° decays, as well as decays into light, c and b flavors, selected using the SLD vertex detector. In addition we have updated our comparison of hadron and antihadron production in light quark (rather than antiquark) jets, selected using the high SLC electron beam polarization. Differences between hadron and antihadron production at high momentum fraction provide precise measurements of leading particle production and new, stringent tests of fragmentation models.
Book Synopsis Dalitz Plot Analysis of D0 Hadronic Decays D0-]K0K-pi+, D0-]antiK0K+pi- and D0-]antiK0K+K- by :
Download or read book Dalitz Plot Analysis of D0 Hadronic Decays D0-]K0K-pi+, D0-]antiK0K+pi- and D0-]antiK0K+K- written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A Dalitz plot analysis of the D[sup 0] hadronic decays D[sup 0][yields] K[sup 0]K[sup -][pi][sup+], D[sup 0][yields][bar K][sup 0] K[sup+][pi][sup -] and D[sup 0][yields][bar K][sup 0] K[sup+] K[sup -] is presented. This analysis is based on a data sample of 22 fb[sup -1] collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC running on or near the[Upsilon](4S) resonance. The events are selected from continuum e[sup+]e[sup -] annihilations using the decay D*[sup+][yields] D[sup 0][pi][sup+]. Preliminary measurements of the branching fractions of the above hadronic decays are obtained. Preliminary estimates of fractions and phases for resonant and nonresonant contributions to the Dalitz plot are also presented.
Book Synopsis Measurements of Hadronic Decays of Z° Bosons by :
Download or read book Measurements of Hadronic Decays of Z° Bosons written by and published by . This book was released on 1992 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Z° bosons have been produced by collisions of longitudinally polarized electrons with unpolarized positrons at the SLAC Linear Collider and their decays have been recorded by the SLD experiment. We present preliminary measurements of the properties of the resulting Z° decays into multi-hadronic final states. We find good agreement with the predictions of perturbative QCD and fragmentation models.
Book Synopsis A Preliminary Improved Measurement of the B Hadron Energy Distribution in Z° Decays by :
Download or read book A Preliminary Improved Measurement of the B Hadron Energy Distribution in Z° Decays written by and published by . This book was released on 1998 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors have measured the B hadron energy distribution in Z° decays using a new technique applied to a sample of inclusive B decays recorded in the SLD experiment at SLAC between 1996 and 1997. The upgraded CCD vertex detector is used to reconstruct B-decay vertices with high efficiency and purity, and to provide precise measurements of the kinematic quantities used in this technique. For each reconstructed B-decay vertex, the part of the B energy missing from the vertex is derived from the kinematic quantities. B vertices with low missing mass are selected to provide a very high purity sample and to obtain good energy resolution. The authors compare the scaled B hadron energy distribution with the predictions of several QCD and phenomenological models of heavy quark fragmentation. The average scaled energy x{sub B} is measured to be 0.719"0.005 (stat.)"0.001 (unfolding) (preliminary).
Book Synopsis Particle Correlations in Hadronic Decays of the Z Boson by : Aly Aamer Syed
Download or read book Particle Correlations in Hadronic Decays of the Z Boson written by Aly Aamer Syed and published by . This book was released on 1994 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government reports annual index by :
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 890 pages. Available in PDF, EPUB and Kindle. Book excerpt:
![Download Preliminary Measurement of Leading Particle Effects in Hadronic Z[sup 0] Decays PDF Online Free](https://books.google.com/books/content/images/frontcover/O-UDkAEACAAJ?fife=w200-h370)
![Download Hadron Fragmentation Functions and Leading Particle Effects in Hadronic Z[sup 0] Decays: New Results from SLD. PDF Online Free](https://books.google.com/books/content/images/frontcover/pZ_vjwEACAAJ?fife=w200-h370)
![Download Strange Particle Production in Hadronic Z[sup 0] Decays PDF Online Free](https://books.google.com/books/content/images/frontcover/PsTgjwEACAAJ?fife=w200-h370)
![Download A Study of K[sub S] [Lambda] and [bar [Lambda] Production in Hadronic Z[sup 0] Decays PDF Online Free](https://books.google.com/books/content/images/frontcover/XI-mDAEACAAJ?fife=w200-h370)
![Download Measurements of Hadronic Decays of Z[sup 0] Bosons PDF Online Free](https://books.google.com/books/content/images/frontcover/P-iqAQAACAAJ?fife=w200-h370)
![Download Production of Charged [pi]{sup {+-}}, [Kappa]{sup {+-}} and P/p in Hadronic Z° Decays PDF Online Free](https://books.google.com/books/content/images/frontcover/xdIxngAACAAJ?fife=w200-h370)
![Download Dalitz Plot Analysis of D0 Hadronic Decays D0-]K0K-pi+, D0-]antiK0K+pi- and D0-]antiK0K+K- PDF Online Free](https://books.google.com/books/content/images/frontcover/SP3-jwEACAAJ?fife=w200-h370)
