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Title: Determination of the Pion Charge Form Factor at Q 2 = 1.60 and 2.45 ( GeV / c ) 2

Abstract

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.

Authors:
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Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE - Office of Energy Research (ER)
Contributing Org.:
Jefferson Lab Fπ Collaboration
OSTI Identifier:
894664
Report Number(s):
JLAB-PHY-06-523; DOE/ER/40150-4100; nucl-ex/0607005
Journal ID: ISSN 0031-9007; PRLTAO; TRN: US0700212
DOE Contract Number:  
AC05-06OR23177
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 97; Journal Issue: 19; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CROSS SECTIONS; ELECTROPRODUCTION; FORECASTING; FORM FACTORS; FOUR MOMENTUM TRANSFER; MONOPOLES; NUCLEONS; PHOTONS; PIONS

Citation Formats

Horn, T., Aniol, K., Arrington, J., Barrett, B., Beise, E. J., Blok, H. P., Boeglin, W., Brash, E. J., Breuer, H., Chang, C. C., Christy, M. E., Ent, R., Gaskell, D., Gibson, E., Holt, R. J., Huber, G. M., Jin, S., Jones, M. K., Keppel, C. E., Kim, W., King, P. M., Kovaltchouk, V., Liu, J., Lolos, G. J., Mack, D. J., Margaziotis, D. J., Markowitz, P., Matsumura, A., Meekins, D., Miyoshi, T., Mkrtchyan, H., Niculescu, I., Okayasu, Y., Pentchev, L., Perdrisat, C., Potterveld, D., Punjabi, V., Reimer, P., Reinhold, J., Roche, J., Roos, P. G., Sarty, A., Smith, G. R., Tadevosyan, V., Tang, L. G., Tvaskis, V., Vidakovic, S., Volmer, J., Vulcan, W., Warren, G., Wood, S. A., Xu, C., and Zheng, X. Determination of the Pion Charge Form Factor at Q2=1.60 and 2.45  (GeV/c)2. United States: N. p., 2006. Web. doi:10.1103/PhysRevLett.97.192001.
Horn, T., Aniol, K., Arrington, J., Barrett, B., Beise, E. J., Blok, H. P., Boeglin, W., Brash, E. J., Breuer, H., Chang, C. C., Christy, M. E., Ent, R., Gaskell, D., Gibson, E., Holt, R. J., Huber, G. M., Jin, S., Jones, M. K., Keppel, C. E., Kim, W., King, P. M., Kovaltchouk, V., Liu, J., Lolos, G. J., Mack, D. J., Margaziotis, D. J., Markowitz, P., Matsumura, A., Meekins, D., Miyoshi, T., Mkrtchyan, H., Niculescu, I., Okayasu, Y., Pentchev, L., Perdrisat, C., Potterveld, D., Punjabi, V., Reimer, P., Reinhold, J., Roche, J., Roos, P. G., Sarty, A., Smith, G. R., Tadevosyan, V., Tang, L. G., Tvaskis, V., Vidakovic, S., Volmer, J., Vulcan, W., Warren, G., Wood, S. A., Xu, C., & Zheng, X. Determination of the Pion Charge Form Factor at Q2=1.60 and 2.45  (GeV/c)2. United States. https://doi.org/10.1103/PhysRevLett.97.192001
Horn, T., Aniol, K., Arrington, J., Barrett, B., Beise, E. J., Blok, H. P., Boeglin, W., Brash, E. J., Breuer, H., Chang, C. C., Christy, M. E., Ent, R., Gaskell, D., Gibson, E., Holt, R. J., Huber, G. M., Jin, S., Jones, M. K., Keppel, C. E., Kim, W., King, P. M., Kovaltchouk, V., Liu, J., Lolos, G. J., Mack, D. J., Margaziotis, D. J., Markowitz, P., Matsumura, A., Meekins, D., Miyoshi, T., Mkrtchyan, H., Niculescu, I., Okayasu, Y., Pentchev, L., Perdrisat, C., Potterveld, D., Punjabi, V., Reimer, P., Reinhold, J., Roche, J., Roos, P. G., Sarty, A., Smith, G. R., Tadevosyan, V., Tang, L. G., Tvaskis, V., Vidakovic, S., Volmer, J., Vulcan, W., Warren, G., Wood, S. A., Xu, C., and Zheng, X. Wed . "Determination of the Pion Charge Form Factor at Q2=1.60 and 2.45  (GeV/c)2". United States. https://doi.org/10.1103/PhysRevLett.97.192001. https://www.osti.gov/servlets/purl/894664.
@article{osti_894664,
title = {Determination of the Pion Charge Form Factor at Q2=1.60 and 2.45  (GeV/c)2},
author = {Horn, T. and Aniol, K. and Arrington, J. and Barrett, B. and Beise, E. J. and Blok, H. P. and Boeglin, W. and Brash, E. J. and Breuer, H. and Chang, C. C. and Christy, M. E. and Ent, R. and Gaskell, D. and Gibson, E. and Holt, R. J. and Huber, G. M. and Jin, S. and Jones, M. K. and Keppel, C. E. and Kim, W. and King, P. M. and Kovaltchouk, V. and Liu, J. and Lolos, G. J. and Mack, D. J. and Margaziotis, D. J. and Markowitz, P. and Matsumura, A. and Meekins, D. and Miyoshi, T. and Mkrtchyan, H. and Niculescu, I. and Okayasu, Y. and Pentchev, L. and Perdrisat, C. and Potterveld, D. and Punjabi, V. and Reimer, P. and Reinhold, J. and Roche, J. and Roos, P. G. and Sarty, A. and Smith, G. R. and Tadevosyan, V. and Tang, L. G. and Tvaskis, V. and Vidakovic, S. and Volmer, J. and Vulcan, W. and Warren, G. and Wood, S. A. and Xu, C. and Zheng, X.},
abstractNote = {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.},
doi = {10.1103/PhysRevLett.97.192001},
url = {https://www.osti.gov/biblio/894664}, journal = {Physical Review Letters},
issn = {0031-9007},
number = 19,
volume = 97,
place = {United States},
year = {2006},
month = {11}
}

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