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Showing 1 to 10 of 10 for “"weak charge"”.
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First determination of the weak charge of the proton
The Qweak experiment measures the parity violating asymmetry in elastic e[upper script right arrow]p scattering at Q² = 0.02455 (GeV/c)² with a 180 [mu]A and 88.7% longitudinally polarized electron beam of 1.165 GeV and a 34.4 cm liquid hydrogen target in experimental Hall C at Jefferson Lab. As …
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Precision Measurement of the Proton's Weak Charge using Parity-Violating Electron Scattering
The Qweak experiment has precisely determined the weak charge of the proton Qp w by measuring the parity-violating asymmetry in elastic electron-proton scattering at a low momentum transfer of Q2 = 0.0249 (GeV/c)2 . Qpw has a definite prediction in the Standard Model, and a value of sin2 θW can be …
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DIRECT DETERMINATION OF THE WEAK CHARGE OF THE PROTON VIA PARITY-VIOLATING ELECTRON SCATTERING
<p>The weak charge of the proton is determined via Qweak experiment at Thomas Jefferson Laboratory in Newport News, VA. A longitudinally polarized electron beam was scattered by a liquid hydrogen target. The spin direction of the electron beam was switched between left and right helicity states. …
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Precision measurement of the weak charge of the proton and parity violation in the N → ∆ transition
The Q<sub>weak</sub> Experiment ran for two and a half years at the Thomas Jefferson National Accelerator Facility in pursuit of Q<sub>w</sub><sup>p</sup>, the neutral weak analog to the electric charge of the proton. Qweak measured the parity-violating asymmetry in elastic electron-proton …
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Measuring the Weak Charge of the Proton and the Hadronic Parity Violation of the N →Δ Transition
Qweak will determine the weak charge of the proton, QpW, via an asymmetry measurement of parity-violating elastic electron-proton scattering at low four momentum transfer to a precision of 4%. QpW has firm Standard Model prediction and is related to the weak mixing angle, sin20W, a well-defined …
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Parity-Violating Elastic Electron Nucleon Scattering: Measurement of the Strange Quark Content of the Nucleon and Towards a Measurement of the Weak Charge of the Proton
… Jefferson National Accelerator Facility. Q<sub>weak</sub> will measure the weak mixing angle, sin²θ<sub>W</sub>, via a measurement of the weak charge of the proton, at a four-momentum transfer, Q² ~ 0.026 GeV²/c². The precision of this measurement gives Q<sub>weak</sub> access to new physics at …
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Compton polarimeter for Qweak Experiment at Jefferson Laboratory
The Qweak experiment at Jefferson Lab aims to make the first precision measurement of the proton's weak charge, QP = 1 - 4 sin 2 9w at Q2 = 0.026GeV 2 . Given the precision goals in the Qweak experiment, the electron beam polarization must be known to an absolute uncertainty of 1%. A new Compton …
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Constraints on New Physics from Neutrino and Other Particle Experiments
… Properties, we utilize a new measurement of the weak charge of cesium-133, and preliminary Tau-decay branching fractions from Babar. Analysis of semileptonic D-decay is improved by the inclusion of experimentally measured form-factors into the calculation of the Standard Model predictions.
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Immunohistochemistry for studying cyclic nucleotides in the central nervous system, with particular reference to guanosine 3',5'-monophosphate
… bound non -specifically to C.N.S. tissue, via a weak charge attachment between IgG and basic tissue proteins. Specific antibodies were raised in rabbits by immunization with succinyl cyclic nucleotide- protein conjugates, and radioiunological techniques with[3H]tracers were used to study binding …
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First Leptonic Probe of Neutron Radii in Lead at Low-Q2
… structure, the nucleon form factor and the weak charge of proton and electron. They have done so through the technique of the parity-violating asymmetry measurement with limited theoretical uncertainties. My dissertation focuses on the study of nuclear structure, namely the thickness of the …