Measurements of the proton elastic-form-factor ratio {mu}{sup p}G{sup p}{sub E}/G{sup p}{sub M} at low momentum transfer.
Journal Article
·
· Phys. Rev. Lett.
High-precision measurements of the proton elastic form-factor ratio, {mu}{sub p}G{sup p}E/G{sup p}M, have been made at four-momentum transfer, Q{sup 2}, values between 0.2 and 0.5 GeV{sup 2}. The new data, while consistent with previous results, clearly show a ratio less than unity and significant differences from the central values of several recent phenomenological fits. By combining the new form-factor ratio data with an existing cross-section measurement, one finds that in this Q{sup 2} range the deviation from unity is primarily due to G{sup p}E being smaller than expected.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); National Science Foundation (NSF); Israel Science Foundation; Korea Research Foundation; US-Israeli Bi-National Science Foundation
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 958533
- Report Number(s):
- ANL/PHY/JA-59493; PRLTAO; TRN: US1000207
- Journal Information:
- Phys. Rev. Lett., Vol. 99, Issue 2007; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- ENGLISH
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