Published July 12, 2007
| Version v1
Report
Scaling study of the pion electroproduction cross sections and the pion form factor
Creators
- Tanja Horn
- Xin Qian
- John Arrington
- Razmik Asaturyan
- Fatiha Benmokthar
- Werner Boeglin
- Peter Bosted
- Antje Bruell
- Eric Christy
- Eugene Chudakov
- Ben Clasie
- Mark Dalton
- AJI Daniel
- Donal Day
- Dipangkar Dutta
- Lamiaa El Fassi
- Rolf Ent
- Howard Fenker
- J. Ferrer
- Nadia Fomin
- H. Gao
- K Garrow
- Dave Gaskell
- C Gray
- G. Huber
- M. Jones
- N Kalantarians
- C. Keppel
- K Kramer
- Y Li
- Y Liang
- A. Lung
- S Malace
- P. Markowitz
- A. Matsumura
- D. Meekins
- T Mertens
- T Miyoshi
- H. Mykrtchyan
- R. Monson
- T. Navasardyan
- G. Niculescu
- I. Niculescu
- Y. Okayasu
- A. Opper
- C Perdrisat
- V. Punjabi
- A. Rauf
- V. Rodriguez
- D. Rohe
- J Seely
- E Segbefia
- G. Smith
- M. Sumihama
- V. Tadevoyan
- L Tang
- V. Tvaskis
- A. Villano
- W. Vulcan
- F. Wesselmann
- S. Wood
- L. Yuan
- X. Zheng
- Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Description
The 1H(e,e(prime)π+)n cross section was measured for a range of four-momentum transfer up to Q2=3.91 GeV2 at values of the invariant mass, W, above the resonance region. The Q2-dependence of the longitudinal component is consistent with the Q2-scaling prediction for hard exclusive processes. This suggests that perturbative QCD concepts are applicable at rather low values of Q2. Pion form factor results, while consistent with the Q2-scaling prediction, are inconsistent in magnitude with perturbative QCD calculations. The extraction of Generalized Parton Distributions from hard exclusive processes assumes the dominance of the longitudinal term. However, transverse contributions to the cross section are still significant at Q2=3.91 GeV2
Availability note (English)
Available from http://www1.jlab.org/Ul/Publications/documents/ACF1683.pdf; PURL: https://www.osti.gov/servlets/purl/909652-p48DYb/Additional details
Identifiers
Publishing Information
- Imprint Pagination
- vp.
- Report number
- JLAB-PHY--07-679
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 39005320
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Resource subtype / Literary indicator
- Non-conventional Literature
- Descriptors DEI
- CROSS SECTIONS; ELECTROPRODUCTION; FORM FACTORS; PIONS; QUANTUM CHROMODYNAMICS; RESONANCE
- Descriptors DEC
- BASIC INTERACTIONS; BOSONS; DIMENSIONLESS NUMBERS; ELECTROMAGNETIC INTERACTIONS; ELEMENTARY PARTICLES; FIELD THEORIES; HADRONS; INTERACTIONS; MESONS; PARTICLE INTERACTIONS; PARTICLE PRODUCTION; PARTICLE PROPERTIES; PSEUDOSCALAR MESONS; QUANTUM FIELD THEORY
Optional Information
- Contract/Grant/Project number
- AC05-84ER40150
- Funding organization
- USDOE - Office of Energy Research (ER) (United States)
- Secondary number(s)
- DOE/ER--40150-4286