Determination of the Charged Pion Form Factor at Q2

Determination of the Charged Pion Form Factor at Q2 PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 192001

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Book Description
The H(e, e(prime)pi+)n cross section was measured at four-momentum transfers of Q2=1.60 and 2.45 GeV2 at an invariant mass of the photon nucleon system of W=2.22 GeV. The charged pion form factor (F{sub pi}) was extracted from the data by comparing the separated longitudinal pion electroproduction cross section to a Regge model prediction in which F{sub pi} is a free parameter. The results indicate that the pion form factor deviates from the charge-radius constrained monopole form at these values of Q2 by one sigma, but is still far from its perturbative Quantum Chromo-Dynamics prediction.

Determination of the Pion Charge Form Factor for Q^2

Determination of the Pion Charge Form Factor for Q^2 PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 55205

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Book Description
The data analysis for the reaction H(e, e(prime) pi)n, which was used to determine values for the charged pion form factor Fpi for values of Q2 = 0.6-1.6 (gEv/C)2, has been repeated with careful inspection of all steps and special attention to systematic uncertainties. Also the method used to extract Fpi from the measured longitudinal cross section was critically reconsidered. Final values for the separated longitudinal and transverse cross sections and the extracted values of Fpi are presented.

Charged Pion Form Factor Between $Q^2$

Charged Pion Form Factor Between $Q^2$ PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 45203

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Book Description
DOI: http://dx.doi.org/10.1103/PhysRevC.78.045203 The charged pion form factor, Fpi(Q2), is an important quantity that can be used to advance our knowledge of hadronic structure. However, the extraction of Fpi from data requires a model of the 1H(e, e'pi+)n reaction and thus is inherently model dependent. Therefore, a detailed description of the extraction of the charged pion form factor from electroproduction data obtained recently at Jefferson Lab is presented, with particular focus given to the dominant uncertainties in this procedure. Results for Fpi are presented for Q2=0.60-2.45 GeV2. Above Q2=1.5 GeV2, the Fpi values are systematically below the monopole parametrization that describes the low Q2 data used to determine the pion charge radius. The pion form factor can be calculated in a wide variety of theoretical approaches, and the experimental results are compared to a number of calculations. This comparison is helpful in understanding the role of soft versus hard c.

Determining the Pion Form Factor at High Q2, 1992

Determining the Pion Form Factor at High Q2, 1992 PDF Author: Richard Kahler
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Nuclear Science Abstracts

Nuclear Science Abstracts PDF Author:
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 1292

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Precision Measurement of the Charged Pion Form Factor

Precision Measurement of the Charged Pion Form Factor PDF Author: Tanja Horn
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Hadronic form factors are objects that contribute significantly to our understanding of the structure of matter. The simplest hadronic system is the pion, whose electromagnetic structure is given by a single form factor (F). In this talk the results from the most recent Fpi at Jefferson Lab are presented.

The Pion Charge Form Factor Through Pion Electroproduction

The Pion Charge Form Factor Through Pion Electroproduction PDF Author:
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ISBN:
Category :
Languages : en
Pages :

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The goal of Jefferson Lab experiment E01-004 (F?-2) was the measurement of the longitudinal and transverse cross sections via pion electroproduction from hydrogen and deuterium for the purpose of extracting the charged pion form factor using pole dominance. The data were taken at two values of Q2 (1.60 and 2.45 GeV/c)2. In order to attain full coverage in R?, charged pions were detected in parallel kinematics (along the direction of momentum transfer, q), and at ±3 degrees off the direction of momentum transfer. For each Q2 data were taken for two values of the virtual photon polarization,?, respectively. All data were taken at a fixed center of mass energy, W=2.22 GeV. The longitudinal and transverse pieces of the cross section were separated using the Rosenbluth separation method.

Measurement of the Charged Pion Form Factor Slope from the Reaction [pi]−p --> Nee− at Rest

Measurement of the Charged Pion Form Factor Slope from the Reaction [pi]−p --> Nee− at Rest PDF Author: Richard Garland
Publisher:
ISBN:
Category : Form factor (Nuclear physics)
Languages : en
Pages : 126

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Measurement of the Charged Pion Form Factor Slope from the Reaction [pi]−p --> Ne+e− at Rest

Measurement of the Charged Pion Form Factor Slope from the Reaction [pi]−p --> Ne+e− at Rest PDF Author: Richard Garland
Publisher:
ISBN:
Category : Pions
Languages : en
Pages : 126

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Electromagnetic Interactions and Hadronic Structure

Electromagnetic Interactions and Hadronic Structure PDF Author: Frank Close
Publisher: Cambridge University Press
ISBN: 1139463810
Category : Science
Languages : en
Pages : 495

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Book Description
Written by leading experts in the field, this book provides an authoritative overview on electromagnetic interactions. It describes the main features of the experimental data and the theoretical ideas used in their interpretation, and is an essential reference for graduate students and researchers in particle physics and electromagnetic interactions.