Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Download New Measurements Of The Electron Neutron Spin Asymmetry In The Neutron Beta Decay full books in PDF, epub, and Kindle. Read online New Measurements Of The Electron Neutron Spin Asymmetry In The Neutron Beta Decay ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Author :
Publisher :
ISBN 13 :
Total Pages : 15 pages
Book Rating : 4.:/5 (931 download)
Download or read book New Measurements of the Electron-neutron Spin Asymmetry in the Neutron Beta-decay written by and published by . This book was released on 1991 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : I. A. Kuznecov
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (258 download)
Download or read book New Measurements of the Antineutrino-spin Asymmetry in Beta Decay of the Neutron and Restriction for Mass of MWR written by I. A. Kuznecov and published by . This book was released on 1994 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of the Neutrino-spin Correlation Parameter B Neutron Decay Using Ultracold Neutrons written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a new approach to measuring the neutrino-spin correlation parameter B in neutron decay. The approach combines the technology of large-area ion-implanted silicon detectors being developed for the abBA experiment, with an ultracold neutron source to provide more precise neutron polarimetry. The technique detects both proton and electron from the neutron decay in coincidence. B is determined from an electron-energy-dependent measurement of the proton spin asymmetry. This approach will provide a statistical precision of 1 x 10-4 . The systematic precision is still being evaluated, but is expected to be below 1 x 10-3, and could approach 1 x 10-4 . A measurement of B with this precision would place constraints on supersymmetric extensions to the Standard Model.
Author : Michael Praetorius Mendenhall
Publisher :
ISBN 13 :
Total Pages : 400 pages
Book Rating : 4.:/5 (884 download)
Download or read book Measurement of the Neutron Beta Decay Asymmetry Using Ultracold Neutrons written by Michael Praetorius Mendenhall and published by . This book was released on 2014 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: The free neutron beta decay correlation A0 between neutron polarization and electron emission direction provides the strongest constraint on the ratio [lambda] = g[sub-A]/g[sub-V] of the Axial-vector to Vector coupling constants in Weak decay. In conjunction with the CKM Matrix element V[sub-ud] and the neutron lifetime [tau sub-n], [lambda] provides a test of Standard Model assumptions for the Weak interaction. Leading high-precision measurements of A0 and [tau sub-n] in the 1995-2005 time period showed discrepancies with prior measurements and Standard Model predictions for the relationship between [lambda], [tau sub-n], and V[sub-ud]. The UCNA experiment was developed to measure A0 from decay of polarized ultracold neutrons (UCN), providing a complementary determination of [lambda] with different systematic uncertainties from prior cold neutron beam experiments. This dissertation describes analysis of the dataset collected by UCNA in 2010, with emphasis on detector response calibrations and systematics. The UCNA measurement is placed in the context of the most recent [tau sub-n] results and cold neutron A0 experiments.
Author : Junhua Yuan
Publisher :
ISBN 13 :
Total Pages : 360 pages
Book Rating : 4.:/5 (437 download)
Download or read book Progress Towards a High Precision Measurement of the Neutron Spin--electron Angular Correlation in Polarized Neutron Beta Decay with Ultra-cold Neutrons written by Junhua Yuan and published by . This book was released on 2006 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 339 pages
Book Rating : 4.:/5 (951 download)
Download or read book Measurements of the Neutron Longitudinal Spin Asymmetry A1n and Flavor Decomposition in the Valence Quark Region written by and published by . This book was released on 2014 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: The current data for the nucleon-virtual photon longitudinal spin asymmetry A1 on the proton and neutron have shown that the ratio of the polarized-to-unpolarized down-quarkparton distribution functions, Dd=d, tends towards -1/2 at large x, in disagreement with the perturbative QCD prediction that Dd/d approaches 1 but more in line with constituent quark models. As a part of experiment E06-014 in Hall A of Jefferson Lab, double-spin asymmetries were measured in the scattering of a longitudinally polarized electron beam of energies 4.74 and 5.89 GeV from a longitudinally and transversely polarized 3He target in the deep inelastic scattering and resonance region, allowing for the extraction of the neutron asymmetry An1 and the ratios Dd/d and Du/u. We will discuss our analysis of the data and present results for A1 and g1/F1 on both 3He and the neutron, and the resulting quark ratios for the up and down quarks in the kinematic range of 0.2.
Author : David Flay
Publisher :
ISBN 13 :
Total Pages : 339 pages
Book Rating : 4.:/5 (128 download)
Download or read book Measurements of the Neutron Longitudinal Spin Asymmetry A1 and Flavor Decomposition in the Valence Quark Region written by David Flay and published by . This book was released on 2014 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: The current data for the nucleon-virtual photon longitudinal spin asymmetry A1 on the proton and neutron have shown that the ratio of the polarized-to-unpolarized down-quark parton distribution functions, d/d, tends towards -1/2 at large x, in disagreement with the perturbative QCD prediction that d/d approaches 1 but more in line with constituent quark models. As a part of experiment E06-014 in Hall A of Jefferson Lab, double-spin asymmetries were measured in the scattering of a longitudinally polarized electron beam of energies 4.74 and 5.89 GeV from a longitudinally and transversely polarized 3He target in the deep inelastic scattering and resonance region, allowing for the extraction of the neutron asymmetry A1n and the ratios d/d and u/u. We will discuss our analysis of the data and present results for A1 and g1/F1 on both 3He and the neutron, and the resulting quark ratios for the up and down quarks in the kinematic range of 0.2 2 2 for our deep inelastic scattering data. Invoking duality, we also extract A1n and g1n/F1n in the resonance region, characterized by 0.6 2 2. Our measurements are compared to the world data and various theoretical models and more recent predictions using the Dyson-Schwinger Equation approach. We also present analysis of the unpolarized cross section data, which contributes to the g1 spin structure function and eventually the a2 matrix element, an x2-weighted moment of g1. The extracted a2 data are compared to a Lattice QCD calculation.
Author :
Publisher :
ISBN 13 :
Total Pages : 21 pages
Book Rating : 4.:/5 (931 download)
Download or read book Project of Neutron Beta-decay A-asymmetry Measurement with Relative Accuracy of (1 2) 10 -3 written by and published by . This book was released on 2004 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : John F. Donoghue
Publisher : Cambridge University Press
ISBN 13 : 1009291009
Total Pages : 599 pages
Book Rating : 4.0/5 (92 download)
Download or read book Dynamics of the Standard Model written by John F. Donoghue and published by Cambridge University Press. This book was released on 2023-01-31 with total page 599 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 2014 edition, now OA, provides a detailed and practical account of the Standard Model of particle physics.
Author : Melanie Leigh Cardona
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (139 download)
Download or read book Measuring the Neutron Spin Asymmetry A1n in the Valence Quark Region in Hall C at Jefferson Lab written by Melanie Leigh Cardona and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The quest to understand how the nucleon spin is decomposed into its constituent quark and gluon spin and orbital angular momentum (OAM) components has been at the forefront of nuclear physics for decades. Due to the non-perturbative nature of Quantum Chromodynamics (QCD) - the theory describing how quarks and gluons bind together to form protons and neutrons - making absolute predictions of nucleon spin structure is generally difficult, especially as a function of its quark and gluon longitudinal momentum fraction x. Measurements involving nucleon spin structure serve as a sensitive test for QCD, including ab-initio lattice QCD calculations due to the advent of the quasi-PDF formalism, and various predictions that diverge at large-x. The neutron spin asymmetry A1n at high-x is a key observable for probing nucleon spin structure. In the valence domain (x > 0.5), sea effects are expected to be negligible, and so the total nucleon spin is considered to be carried by the valence quarks. The valence region can therefore enable us to study the role of quark OAM and other non-perturbative effects of the strong force. A1^n was measured in the deep inelastic scattering region of 0.40
Author :
Publisher :
ISBN 13 :
Total Pages : 1 pages
Book Rating : 4.:/5 (946 download)
Download or read book Precision Measurement of the Neutron Spin Asymmetry A{sub 1}{sup N} and Spin-flavor Decomposition in the Valence Quark Region written by and published by . This book was released on 2004 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Christopher R. Gould
Publisher : World Scientific
ISBN 13 : 9810246676
Total Pages : 268 pages
Book Rating : 4.8/5 (12 download)
Download or read book Fundamental Physics with Pulsed Neutron Beams written by Christopher R. Gould and published by World Scientific. This book was released on 2001 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Low energy neutron beams are used to address many questions in nuclear physics, particle physics and astrophysics. The scientific issues include elucidating the nature of time reversal noninvariance; understanding the origin of the baryon asymmetry in the Universe; describing the weak interaction between quarks and between nucleons; understanding the origin of the elements in stellar and big bang nucleosynthesis.This book summarizes how spallation neutron sources work and discuss the advantages of pulsed beams in reducing systematic errors in precision measurements. It also describes recent breakthroughs in ultracold neutron production, together with the physics that will be addressed by the new generation of intense neutron sources.
Download or read book A Study of the Spin Structure on the Neutron in Deep Inelastic Scattering of Polarized Electrons on Polarized Neutrons written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The internal spin structure of the neutron, was studied in deep inelastic scattering of longitudinally polarized electrons from a polarized [sup 3]He target in the End Station A of the Stanford Linear Accelerator Center (SLAC). The spin asymmetry of the neutron was measured at energies between 19 and 26 GeV in the range 0.03 [le] x [le] 0.06 at an average Q[sup 2] of 2 (GeV/c)[sup 2]. The results are in agreement with a new measurement of the asymmetry by SMC within their six times larger uncertainties. The spin dependent structure function g[sub 1](x) for the neutron was determined from the asymmetry measurement and, its integral over x is found to be [integral]g[sub 1][sup n](x)dx = -0.038 [+-] 0.009. This result is 2.7 standard deviations from the Ellis-Jaffe Sum Rule and combined with the EMC results from the proton in very good agreement with the Bjorken Sum Rule. In the Quark Parton Model (QPM), in conjunction with the weak coupling constants F and D, from baryon decay, the result implies that the quarks contribute approximately 32% of the nucleon helicity. Finally, different ways of evolving the data, based on various theoretical models, is attempted and future aspects for spin physics, with emphasis at spin physics at SLAC, are discussed.
Author : Atomic Energy of Canada Limited
Publisher :
ISBN 13 :
Total Pages : 5 pages
Book Rating : 4.:/5 (719 download)
Download or read book Electron Asymmetry in the Beta Decay of Polarized Neutrons written by Atomic Energy of Canada Limited and published by . This book was released on 1960 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Alexander Milovan Converse
Publisher :
ISBN 13 :
Total Pages : 248 pages
Book Rating : 4.:/5 (89 download)
Download or read book A Measurement of the Asymmetry Parameter for 35ARl-decay as a Test of the CVC Hypothesis written by Alexander Milovan Converse and published by . This book was released on 1993 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 234 pages
Book Rating : 4.:/5 (957 download)
Download or read book Measurements of the Double-Spin Asymmetry A1 on Helium-3 written by and published by . This book was released on 2011 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: The spin structure of protons and neutrons has been an open question for nearly twenty-five years, after surprising experimental results disproved the simple model in which valence quarks were responsible for nearly 100% of the nucleon spin. Diverse theoretical approaches have been brought to bear on the problem, but a shortage of precise data - especially on neutron spin structure - has prevented a thorough understanding. Experiment E06-014, conducted in Hall A of Jefferson Laboratory in 2009, presented an opportunity to add to the world data set for the neutron in the poorly covered valence-quark region. Jefferson Laboratory's highly polarized electron beam, combined with Hall A's facilities for a high-density, highly polarized 3He target, allowed a high-luminosity double-polarized experiment, while the large acceptance of the BigBite spectrometer gave coverage over a wide kinematic range: 0.15
Download or read book New Precision Measurements of Free Neutron Beta Decay with Cold Neutrons written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Precision measurements in free neutron beta decay serve to determine the coupling constants of beta decay, and offer several stringent tests of the standard model. This study describes the free neutron beta decay program planned for the Fundamental Physics Beamline at the Spallation Neutron Source at Oak Ridge National Laboratory, and finally puts it into the context of other recent and planned measurements of neutron beta decay observables.
