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Showing 1 to 20 of 72 for “"precision measurement"”.
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Toward a Precision Measurement of CEvNS on Liquid Argon
The COHERENT collaboration has made measurements of the coherent elastic neutrino nucleus scattering (CEvNS) cross section on several targets. The first liquid argon measurement was made in 2021. The collaboration is currently undertaking precise measurements of the CEvNS cross section, the first …
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Precision Measurement of Relative Dipole Matrix Elements in Atomic Sodium
<p>Relative dipole matrix elements are measured by means of a new spectroscopic technique called polarization interference spectroscopy. It is a two-color two-photon nonresonant process that maps the matrix elements into the energy domain by means of quantum mechanical interference. The technique …
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A Precision Measurement of the Neutron d2: Probing the Color Force
… date, theoretical calculations and experimental measurements of the neutron d2 differ by about two standard deviations. Therefore, JLab experiment E06-014, performed in Hall A, made a precision measurement of this quantity. Double spin asymmetries and absolute cross-sections were measured in both …
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A High Precision Measurement of the Proton Charge Radius at JLab
… from the compilation of all previous $r_{p}$ measurements, creating the ``proton charge radius puzzle".</p><p>In order to investigate the puzzle, </p><p>the PRad experiment (E12-11-106\footnote{Spokespersons: A. Gasparian (contact), H. Gao, M. Khandaker, D. Dutta}) was first proposed in 2011 …
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Spectroscopy of ultracold metastable hydrogen : in pursuit of a precision measurement
… that will be used later in the proposed precision measurements of 2S-nS transitions. The design, construction and characterization of the diode laser system for performing spectroscopy of the two photon 2S-8S transition is explained and recommended parameters for a proposed signal search …
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Precision Measurement of the Mass Difference of Neutral and Charged B Mesons
This work presents a precision determination of the mass difference of neutral and charged B mesons, m(B0) - m(B+). The measurement is based on a data sample of about 232 million B-meson pairs recorded with the BABAR detector at the e+e- storage-ring system PEP-II. In events of e+e- --> …
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Precision Measurement of the Spin Structure of the Proton and the Deuteron
<p>Experiment E155 at the Stanford Linear Accelerator Center measured the spin structure functions <em>g</em>1 and <em>g</em>2 of the proton and deuteron using deep inelastic scattering of 50 GeV polarized electrons from dynamically polarized, solid <sup>15</sup>NH<sub>3</sub> and <sup>6</sup>LiD …
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Computational Canopy Models For Precision Measurement And Adaptive Management Of Grapevine Performance
… response. Although the sub-discipline of precision viticulture has established that a quantitative understanding of plot-scale spatial variability can guide cultural inputs toward plot-scale consistency, the existence and small-scale spatial patterns and their effect on precision …
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Precision Measurement of the Proton's Weak Charge using Parity-Violating Electron Scattering
… beamline background correction, the nonlinearity measurement, and the simulation to constrain error for a rescattering effect. Also detailed here is the final, unblinded Qweak result, which determined Qpw to 6.2% and provided the highest precision measurement of sin2θW at low energy.
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Control and diagnosis of real-time systems under finite-precision measurement of time
… DESs in which the digital-clocks of finite-precision are employed to observe the event occurrence times, thereby relaxing the assumption of the prior works that time can be measured precisely. In our setting, the passing of time is measured using the number of ticks generated by a …
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Precision measurement of the proton electric to magnetic form factor ratio with BLAST
We have measured ... in the South Hall Ring of the MIT-Bates Linear Accelerator Facility. This experiment used a polarized electron beam, a pure hydrogen internal polarized target, and the symmetric Bates Large Acceptance Spectrometer Toroid (BLAST) detector. By measuring the spin-dependent elastic …
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High precision measurement of the proton elastic form factor ratio at low Q²
… (FPP). In this low Q2 region, previous measurement from Jefferson Lab Hall A (LEDEX) along with various fits and calculations indicate substantial deviations of the ratio from unity. For this new measurement, the proposed statistical uncertainty (< 1%) was achieved. These new results are …
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Muon-Catalyzed Fusion Effects in the Precision Measurement of Muon Capture on the Deuteron
… rate of muon capture on the deuteron to 1.5~\% precision. This reaction is related to solar $pp$ fusion and the $\nu d$ scattering reaction at the Sudbury Neutrino Observatory through effective field theories like chiral perturbation theory. The Gamow-Teller transition in all of these processes …
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A precision measurement of the cosmic ray positron fraction on the International Space Station
AMS-02 is a precision particle physics experiment in space aiming to study dark matter, antimatter, and properties of cosmic rays to the TeV energy scale. This thesis presents a study of the cosmic ray positron fraction in AMS-02 data covering an energy range of 0.5 GeV to 500 GeV, and identifies …
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Precision measurement of the boron to carbon ratio in cosmic rays with AMS-02
A precision measurement of the Boron to Carbon ratio in cosmic rays is carried out in the range 1 GeV/n to 670 GeV/n using the first 30 months of flight data of AMS-02 located on the International Space Station. Above 20 GeV/n, it is the first accurate measurement. About 5 million clean Boron and …
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Precision measurement of carbon isotope ratio in exhaled breath for the detection of helicobacter pylori
… that performs whole band integrated absorption measurements. Detection is based on a novel feedback mechanism whereby an imbalance in the channel absorptions causes the pathlength along one of the channels to be altered in order to bring the system back to balance. This change in ratio of …
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Precision measurement of electron and positron flux in cosmic rays with the AMS-02 Detector
The cosmic ray electron and positron flux measurement can address a series of astrophysics and particle physics questions. This thesis presents an analysis of electron and positron flux from 0.5 GeV to 1 TeV using the first 30 months of data taking( over 41 billion events), with the AMS-02 detector …
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Precision measurement of neutron spin asymmetry An1 at large xBj using CEBAF at 5.7 GeV
… An1 and spin structure function gn1 to a good precision at three kinematics x = 0.33, 0.47 and 0.60, with Q2 = 2.7, 3.6 and 4.9 (GeV/c)2, respectively. The data at the two higher XBj points have improved the statistical accuracy of the world data by one order of magnitude. They show a zero …
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Precision measurement of charged pion and kaon multiplicities in e+e− annihilation at Q = 10.52 GeV
Made available in DSpace on 2013-05-24T22:09:02Z (GMT). No. of bitstreams: 5 Martin_Leitgab.pdf: 6750099 bytes, checksum: 1c74072a10bbfe37134a1d5008553558 (MD5) 0_Leitgab_Martin.zip: 156182 bytes, checksum: 0978b364213855e38da13a5c7b30072f (MD5) Leitgab_Martin.zip: 156182 bytes, checksum: …
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Precision measurement of and search for dark matter in the transverse momentum spectra of Z bosons
A measurement of the differential Z boson production cross section in proton-proton collisions is presented. It furnishes a precision test of the Standard Model, and constrains the parton distribution functions of the proton. Moreover, it is a building block for future measurements of the mass of …
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