Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Measurement Of The Parity Violating Asymmetry A
Download Measurement Of The Parity Violating Asymmetry A full books in PDF, epub, and Kindle. Read online Measurement Of The Parity Violating Asymmetry A ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Parity-violation in Elastic Electron Scattering: A First Measurement of the Parity-violating Asymmetry at Q2 by : Stephanie L. Bailey
Download or read book Parity-violation in Elastic Electron Scattering: A First Measurement of the Parity-violating Asymmetry at Q2 written by Stephanie L. Bailey and published by . This book was released on 2007 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis represents a first measurement of a parity-violating asymmetry in elastic electron scattering at Q2 = 0.631 (GeV/c) 2 off hydrogen at backward angles. This work is based on data obtained during the first part of the run, beginning in March 2006 and ending in May 2006. During this period, a total of 15 C of beam charge was accumulated. The total accumulated charge represents about 15% of the 110 C which was proposed for this Q2. The measured asymmetry is A = (-47.4 +/- 7.1 +/- 5.9 +/- 11.8) ppm, where the first uncertainty is due to statistics, the second uncertainty is systematic, and the third uncertainty is associated with the blinding factor. This result is consistent with a zero contribution from the strange quarks. The helicity-correlated beam properties and slopes are under adequate control for the final precision of the experiment.
Book Synopsis Measurement of the Parity Violating Asymmetry A. by :
Download or read book Measurement of the Parity Violating Asymmetry A. written by and published by . This book was released on 1998 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The weak pion-nucleon coupling constant H{sub {pi}}1 remains poorly determined, despite many years of effort. The recent measurement of the 133Cs anapole moment has been interpreted to give a value of H{sub {pi}}1 almost an order of magnitude larger than the limit established in the 18F parity doublet experiments. A measurement of the gamma ray directional asymmetry A{sub {gamma}} for the capture of polarized neutrons by hydrogen has been proposed at Los Alamos National Laboratory. This experiment will determine H{sub {pi}}1 independent of nuclear structure effects. However, since the predicted asymmetry is small, A{sub {gamma}} (approximately) 5 x 10−8, systematic effects must be reduced to
Book Synopsis Measurement of the Parity-Violating Asymmetry in Deep Inelastic Scattering at JLab 6 GeV. by :
Download or read book Measurement of the Parity-Violating Asymmetry in Deep Inelastic Scattering at JLab 6 GeV. written by and published by . This book was released on 2013 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: The parity-violating asymmetry in deep inelastic scattering (PVDIS) offers us a useful tool to study the weak neutral couplings and the hadronic structure of the nucleon, and provides high precision tests on the Standard Model. During the 6 GeV PVDIS experiment at the Thomas Jefferson National Accelerator Facility, the parity-violating asymmetries A{sub PV} of a polarized electron beam scattering off an unpolarized deuteron target in the deep inelastic scattering region were precisely measured at two Q2 values of 1.1 and 1.9 (GeV/c)2. The asymmetry at Q2=1.9 (GeV/c)2 can be used to extract the weak coupling combination 2C2u - C2d, assuming the higher twist effect is small. The extracted result from this measurement is in good agreement with the Standard Model prediction, and improves the precision by a factor of five over previous data. In addition, combining the asymmetries at both Q2 values provides us extra knowledge on the higher twist effects. The parity violation asymmetries in the resonance region were also measured during this experiment. These results are the first APV data in the resonance region beyond the [Delta] (1232). They provide evidence that the quark hadron duality works for APV at the (10-15)% level, and set constraints on nucleon resonance models that are commonly used for background calculations to other parity-violating electron scattering measurements.
Book Synopsis Parity Violation in Elastic Electron Scattering by :
Download or read book Parity Violation in Elastic Electron Scattering written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of Experiment E04-115 (the G0 backward angle measurement) at Jefferson Lab is to investigate the contributions of strange quarks to the fundamental properties of the nucleon. The experiment measures parity-violating asymmetries in elastic electron scattering off hydrogen and quasielastic electron scattering off deuterium at backward angles at Q2 = 0.631 (GeV/c)2 and Q2 = 0.232 (GeV/c)2. The backward angle measurement represents the second phase of the G0 experiment. The first phase, Experiment E00-006 (the G0 forward angle experiment), measured parity-violating asymmetries in elastic electron scattering off hydrogen at forward angles over a Q2 range of 0.1-1.0 (GeV/c)2. The experiments used a polarized electron beam and unpolarized hydrogen and deuterium liquid targets. From these measurements, along with the electromagnetic form factors, one can extract the contribution of the strange quark to the proton's charge and magnetization distributions. This thesis represents a fi.
Book Synopsis Measurement of the Parity-violating Asymmetry in Inclusive Electroproduction of [pi]- Near the Delta0 Resonance by :
Download or read book Measurement of the Parity-violating Asymmetry in Inclusive Electroproduction of [pi]- Near the Delta0 Resonance written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The parity-violating (PV) asymmetry of inclusive [pi]- production in electron scattering from a liquid deuterium target was measured at backward angles. The measurement was conducted as a part of the G0 experiment, at a beam energy of 360 MeV. The physics process dominating pion production for these kinematics is quasi-free photoproduction off the neutron via the [Delta]0 resonance. In the context of heavy-baryon chiral perturbation theory (HB[chi]PT), this asymmetry is related to a low energy constant d[Delta]- that characterizes the parity-violating [gamma]N[Delta] coupling. Zhu et al. calculated d[Delta]- in a model benchmarked by the large asymmetries seen in hyperon weak radiative decays, and predicted potentially large asymmetries for this process, ranging from A[gamma]- = -5.2 to +5.2 ppm. The measurement performed in this work leads to A[gamma]- = -0.36 " 1.06 " 0.37 " 0.03 ppm (where sources of statistical, systematic and theoretical uncertainties are included), which would disfavor enchancements considered by Zhu et al. proportional to Vud/Vus. The measurement is part of a program of inelastic scattering measurements that were conducted by the G0 experiment, seeking to determine the N-[Delta] axial transition form-factors using PV electron scattering.
Book Synopsis Measurement of the Parity Violating Asymmetry in Elastic Electron Scattering Off 208Pb by : Jonathan William Wexler
Download or read book Measurement of the Parity Violating Asymmetry in Elastic Electron Scattering Off 208Pb written by Jonathan William Wexler and published by . This book was released on 2014 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Lead Radius Experiment (PREX) was carried out in order to provide a model independent measurement of the RMS radius square root r2 of the neutron distribution in the 208Pb nucleus. The parity-violating scattering asymmetry for longitudinally polarized 1.06 GeV electrons from an unpolarized 208Pb target was measured at Q2 = 0.00880 GeV2. This measurement was performed by the PREX collaboration in Hall A at Jefferson Laboratory in Newport News, VA, between March and June, 2010. The electron detectors used in this measurement were designed and fabricated by University of Massachusetts-Amherst and Smith College. The resulting parity-violating asymmetry was measured as APV = 656±60(stat.)±14(sys.) ppb. This asymmetry extrapolates to a difference in radii between the nuclear neutron and proton distributions of square root r2n - square root r2p =0.33 +0.16 -0.18 fm.
Book Synopsis Measurement of Parity-violating Asymmetry in Electron-deuteron Inelastic Scattering by :
Download or read book Measurement of Parity-violating Asymmetry in Electron-deuteron Inelastic Scattering written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The parity-violating asymmetries between a longitudinally-polarized electron beam and an unpolarized deuterium target have been measured recently. The measurement covered two kinematic points in the deep inelastic scattering region and five in the nucleon resonance region. We provide here details of the experimental setup, data analysis, and results on all asymmetry measurements including parity-violating electron asymmetries and those of inclusive pion production and beam-normal asymmetries. The parity-violating deep-inelastic asymmetries were used to extract the electron-quark weak effective couplings, and the resonance asymmetries provided the first evidence for quark-hadron duality in electroweak observables. These electron asymmetries and their interpretation were published earlier, but are presented here in more detail.
Book Synopsis A Measurement of the Parity-Violating Asymmetry in Aluminum and Its Contribution to a Measurement of the Proton's Weak Charge by :
Download or read book A Measurement of the Parity-Violating Asymmetry in Aluminum and Its Contribution to a Measurement of the Proton's Weak Charge written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Q_weak experiment, which ran at the Thomas Jefferson National Accelerator Facility, made a precision measurement of the proton's weak charge, Q^p_W. The weak charge is extracted via a measurement of the parity-violating asymmetry in elastic electron-proton scattering from hydrogen at low momentum transfer (Q^2=0.025 GeV^2). This result is directly related to the electroweak mixing angle, sin^2(Theta_W), a fundamental parameter in the Standard Model of particle physics. This provides a precision test sensitive to new, as yet unknown, fundamental physics. This dissertation focuses on two central corrections to the Q_weak measurement: the target window contribution and sub-percent determination of the electron beam polarization. The aluminum target windows contribute approximately 30% of the measured asymmetry. Removal of this background requires precise measurements of both the elastic electron-aluminum scattering rate and its parity-violating asymmetry. The results reported here are the most precise measurement of the Q_weak target dilution and asymmetry to date. The parity-violating asymmetry for the aluminum alloy was found to be 1.6174 +/- 0.0704 (stat.) +/- 0.0113 (sys.) parts-per-million. The first sub-percent precision polarization measurements made from the Hall C Moller polarimeter are also reported, with systematic uncertainties of 0.84%.
Book Synopsis Measurement of the Parity Violating Asymmetry in Elastic Electron Scattering Off 208Pb by :
Download or read book Measurement of the Parity Violating Asymmetry in Elastic Electron Scattering Off 208Pb written by and published by . This book was released on 2014 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Lead Radius Experiment (PREX) was carried out in order to provide a model-independent measurement of the RMS radius sqrt(r-2/n) of the neutron distribution in the 208Pb nucleus. The parity-violating scattering asymmetry for longitudinally polarized 1.06 GeV electrons from an unpolarized 208Pb target was measured at Q2 = 0.00880 GeV2. This measurement was performed by the PREX collaboration in Hall A at Jefferson Laboratory in Newport News, VA, between March and June, 2010. The electron detectors used in this measurement were designed and fabricated by University of Massachusetts-Amherst and Smith College. The resulting parity-violating asymmetry was measured as APV = 656±60(stat.)±14(sys.) ppb. This asymmetry extrapolates to a difference in radii between the nuclear neutron and proton distributions of sqrt(r-2/n)-sqrt(r-2/p)=0.33^+0.16/-0.18 fm.
Book Synopsis Measurement of the Parity-Violating Asymmetries in Electron-Deuteron Scattering in the Nucleon Resonance Region by :
Download or read book Measurement of the Parity-Violating Asymmetries in Electron-Deuteron Scattering in the Nucleon Resonance Region written by and published by . This book was released on 2013 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on parity-violating asymmetries in the nucleon resonance region measured using 5 - 6 GeV longitudinally polarized electrons scattering off an unpolarized deuterium target. These results are the first parity-violating asymmetry data in the resonance region beyond the [Delta](1232), and provide a verification of quark-hadron duality in the nucleon electroweak [gamma] Z interference structure functions at the (10-15)% level. The results are of particular interest to models relevant for calculating the [gamma] Z box-diagram corrections to elastic parity-violating electron scattering measurements.
Book Synopsis Measurement of Parity-violating Asymmetries in the G[superscript]0 Experiment in Forward Mode by : Silviu Doru Covrig
Download or read book Measurement of Parity-violating Asymmetries in the G[superscript]0 Experiment in Forward Mode written by Silviu Doru Covrig and published by . This book was released on 2005 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Parity Violation In Electron Scattering - Proceedings Of The Workshop by : E J Beise
Download or read book Parity Violation In Electron Scattering - Proceedings Of The Workshop written by E J Beise and published by World Scientific. This book was released on 1990-08-23 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings cover the recent progress and future directions of parity violation in electron scattering. Both experimental and theoretical issues are discussed, such as those of hadronic structure, radiative corrections, and tests of the standard model. There are three sessions, the first of which serves as a general overview of theory and experiment. The second session deals with the technical aspects of making a measurement of the parity violating asymmetry in electron scattering, including not only detector design but polarized electron beams and beam polarimeters.. The remaining session covers the corrections to lowest order parity violating cross sections.
Book Synopsis A Measurement of the Parity Violating Asymmetry in the Neutron Capture on 3He at SNS by : Md Latiful Kabir
Download or read book A Measurement of the Parity Violating Asymmetry in the Neutron Capture on 3He at SNS written by Md Latiful Kabir and published by . This book was released on 2017 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Measurement of the Parity-violating Asymmetry in Aluminum and Its Contribution to a Measurement of the Proton's Weak Charge by : Joshua Allen Magee (Ph.D.)
Download or read book A Measurement of the Parity-violating Asymmetry in Aluminum and Its Contribution to a Measurement of the Proton's Weak Charge written by Joshua Allen Magee (Ph.D.) and published by . This book was released on 2016 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Qweak experiment, which ran at the Thomas Jefferson National Accelerator Facility, made a precision measurement of the protons weak charge, Q_p^W . The weak charge is extracted via a measurement of the parity-violating asymmetry in elastic electron-proton scattering from hydrogen at low momentum transfer (Q^2=0.025 GeV^2). This result is directly related to the electroweak mixing angle, sin2 (theta_W), a fundamental parameter in the Standard Model of particle physics. This provides a precision test sensitive to new, as yet unknown, fundamental physics. This dissertation focuses on two central corrections to the Qweak measurement: the target window contribution and sub-percent determination of the electron beam polarization. The aluminum target windows contribute approximately 30% of the measured asymmetry. Removal of this background requires precise measurements of both the elastic electron-aluminum scattering rate and its parity-violating asymmetry. The results reported here are the most precise measurement of the Qweak target dilution and asymmetry to date. The parity-violating asymmetry for the aluminum alloy was found to be 1.6174 0.0704 (stat.) 0.0113 (sys.) parts-per-million. The first sub-percent precision polarization measurements made from the Hall C Mller polarimeter are also reported, with systematic uncertainties of 0.84%.
Book Synopsis A Measurement of Parity-violating Asymmetries in the G0 Experiment in Forward Mode by :
Download or read book A Measurement of Parity-violating Asymmetries in the G0 Experiment in Forward Mode written by and published by . This book was released on 2004 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: The G0 experiment in Hall C at Jefferson Lab measures the parity-violating asymmetry in elastic electron scattering off hydrogen and quasielastic electron scattering off deuterium in the Q2 range from 0.1 to 1 (GeV)2 in both forward and backward running modes by using a longitudinally polarized electron beam on unpolarized liquid targets. By measuring three independent asymmetries, one in forward running mode off liquid hydrogen and two in backward running mode, one off liquid hydrogen and one off liquid deuterium, the experiment aims to perform for the first time a complete separation and mapping of the strange vector form factors of the nucleon (G_Ms, G_Es) and the isovector axial form factor (G_Ae(T=1)) in three Q2 bins over the Q2 range from 0.1 to 1 (GeV/c)2. To complete the physics program in both forward and backward modes it will take about five years. To accomplish the forward running mode program some 100 C of data are needed. This thesis is based on 9 C of physics data taken during the first chekout of the G0 apparatus during October 2002 - January 2003.
Book Synopsis A Scaler-based Data Acquisition System for Measuring Parity Violation Asymmetry in Deep Inelastic Scattering by : Kai Pan (S.M.)
Download or read book A Scaler-based Data Acquisition System for Measuring Parity Violation Asymmetry in Deep Inelastic Scattering written by Kai Pan (S.M.) and published by . This book was released on 2013 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experiment that measured the parity violating (PV) asymmetry Ad in e- 2H deep inelastic scattering (DIS) at Q2 ~ 1.10 and 1.90 (GeV/c) 2 and XB ~ 0.3 was completed in experimental Hall A at the Thomas Jefferson National Accelerator Facility. The asymmetry can be used to extract the neutral weak coupling combination (2C2u-C2d), providing a factor of five to six improvement over the current world data. To achieve this precision, asymmetries of the 10- level needed to be measured at event rates up to 500 kHz with high electron detection efficiency and high pion background rejection capability. A specialized scaler-based counting data acquisition system (DAQ) with hardware-based particle identification was successfully implemented. The overall pion contamination in the electron sample was controlled to approximately 2 x 10-4 or lower with an electron efficiency above 91% throughout the experiment. The DAQ deadtime contributed an approximately 0.2% uncertainty to the final asymmetries. The statistical quality of the asymmetry measurement agreed with the Gaussian distribution to over five orders of magnitudes and the experimental goal of 3-4% statistical uncertainty was achieved. The results presented here demonstrate that this type of scaler-based DAQ is able to perform accurate measurements of small asymmetries at the 1ppm level. The design of the DAQ system is presented including the analysis of PID performance, deadtime effect and the capability of measuring small asymmetries.
Book Synopsis Parity Violation Inelastic Scattering Experiments at 6 GeV and 12 GeV Jefferson Lab by :
Download or read book Parity Violation Inelastic Scattering Experiments at 6 GeV and 12 GeV Jefferson Lab written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on the measurement of parity-violating asymmetries in the deep inelastic scattering and nucleon resonance regions using inclusive scattering of longitudinally polarized electrons from an unpolarized deuterium target. The effective weak couplings C$_{2q}$ are accessible through the deep-inelastic scattering measurements. Here we report a measurement of the parity-violating asymmetry, which yields a determination of 2C$_{2u}$ - C$_{2d}$ with an improved precision of a factor of five relative to the previous result. This result indicates evidence with 95% confidence that the 2C$_{2u}$ - C$_{2d}$ is non-zero. This experiment also provides the first parity-violation data covering the whole resonance region, which provide constraints on nucleon resonance models. Finally, the program to extend these measurements at Jefferson Lab in the 12 GeV era using the Solenoidal Large Intensity Device was also discussed.
![Download Measurement of the Parity-violating Asymmetry in Inclusive Electroproduction of [pi]- Near the Delta0 Resonance PDF Online Free](https://books.google.com/books/content/images/frontcover/RmTinQAACAAJ?fife=w200-h370)
![Download Measurement of Parity-violating Asymmetries in the G[superscript]0 Experiment in Forward Mode PDF Online Free](https://books.google.com/books/content/images/frontcover/mbi_SgAACAAJ?fife=w200-h370)
