Determination of the Pion Charge Form Factor at Q2=1.60 and 2.45  (GeV/c)2

doi:https://doi.org/10.1103/PhysRevLett.97.192001

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:

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.;

; Jin, S.; Jones, M. K.; Keppel, C. E.; Kim, W. more »

Publication Date:: 2006-11-01

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 F_π 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.

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                    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

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                    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.

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@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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Works referenced in this record:

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

Abstract

Citation Formats

Pion Form Factor journal, July 1979

Separation of σL and σU in π+-electroproduction above the resonance region journal, August 1977

Pion electromagnetic form factor in the spacelike region and P phase δ 1 1 ( s ) of π π scattering from the value of the modulus of the form factor in the timelike region journal, January 2000

Pseudovector components of the pion, π 0 → γ γ , and F π ( q 2 ) journal, December 1998

A measurement of the space-like pion electromagnetic form factor journal, January 1986

Sum rules and the pion form factor in QCD journal, September 1982

Measurement of the pion form factor in the time-like region for q2 values between 0.1 (GeV/c)2 and 0.18 (GeV/c)2 journal, April 1984

Exclusive processes in quantum chromodynamics: Evolution equations for hadronic wavefunctions and the form factors of mesons journal, November 1979

The aerogel threshold Cherenkov detector for the High Momentum Spectrometer in Hall C at Jefferson Lab journal, August 2005

Pion and kaon photoproduction at high energies: forward and intermediate angles journal, December 1997

The applicability of perturbative QCD to exclusive processes journal, May 1989

Pion form factor in QCD: From nonlocal condensates to next-to-leading-order analytic perturbation theory journal, August 2004

Implications of the discrepancy between proton form factor measurements journal, February 2004

Electroproduction of ?+ n, ?- p andK + ?,K + 2211; 0 final states above the resonance region journal, June 1979

Asymptotic Q 2 for Exclusive Processes in Quantum Chromodynamics journal, March 1984

Determination of the pion form factor up to Q 2 = 4 GeV 2 from single-charged-pion electroproduction journal, January 1976

Electroproduction of single pions at low ε and a measurement of the pion form factor up to Q 2 = 10 GeV 2 journal, April 1978

Determination of the longitudinal and the transverse part in π+ electroproduction journal, May 1978

Regge description of charged pseudoscalar meson electroproduction above the resonance region journal, March 1998

Measurement of the Charged Pion Electromagnetic Form Factor journal, February 2001

π, K + , and K 0 electromagnetic form factors journal, October 2000

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

Pion Form Factor
journal, July 1979

Separation of σL and σU in π+-electroproduction above the resonance region
journal, August 1977

Pion electromagnetic form factor in the spacelike region and P phase $δ_{1}^{1} (s)$ of $π π$ scattering from the value of the modulus of the form factor in the timelike region
journal, January 2000

Pseudovector components of the pion, $π^{0} \to γ γ,$ and $F_{π} {(q}^{2})$
journal, December 1998

A measurement of the space-like pion electromagnetic form factor
journal, January 1986

Sum rules and the pion form factor in QCD
journal, September 1982

Measurement of the pion form factor in the time-like region for q2 values between 0.1 (GeV/c)2 and 0.18 (GeV/c)2
journal, April 1984

Exclusive processes in quantum chromodynamics: Evolution equations for hadronic wavefunctions and the form factors of mesons
journal, November 1979

The aerogel threshold Cherenkov detector for the High Momentum Spectrometer in Hall C at Jefferson Lab
journal, August 2005

Pion and kaon photoproduction at high energies: forward and intermediate angles
journal, December 1997

The applicability of perturbative QCD to exclusive processes
journal, May 1989

Pion form factor in QCD: From nonlocal condensates to next-to-leading-order analytic perturbation theory
journal, August 2004

Implications of the discrepancy between proton form factor measurements
journal, February 2004

Electroproduction of ?+ n, ?- p andK + ?,K + 2211; 0 final states above the resonance region
journal, June 1979

Asymptotic $Q^{2}$ for Exclusive Processes in Quantum Chromodynamics
journal, March 1984

Determination of the pion form factor up to $Q^{2} = 4$ ${GeV}^{2}$ from single-charged-pion electroproduction
journal, January 1976

Electroproduction of single pions at low $ε$ and a measurement of the pion form factor up to $Q^{2} = 10$ ${GeV}^{2}$
journal, April 1978

Determination of the longitudinal and the transverse part in π+ electroproduction
journal, May 1978

Regge description of charged pseudoscalar meson electroproduction above the resonance region
journal, March 1998

Measurement of the Charged Pion Electromagnetic Form Factor
journal, February 2001

π, $K^{+},$ and $K^{0}$ electromagnetic form factors
journal, October 2000