Exclusive π+ electroproduction off the proton from low to high -t

doi:10.1103/PhysRevC.100.065204

This content will become publicly available on December 11, 2020

Title: Exclusive $π^{+}$ electroproduction off the proton from low to high $- t$

Abstract

Background: Measurements of exclusive meson production are a valuable tool in the study of hadronic structure. Specifically, one can discern the relevant degrees of freedom at different distance scales through these studies. Purpose: To study the transition between non-perturbative and perturbative Quantum Chromodyanmics as the square of four momentum transfer to the struck proton, –t, is increased. Method: Cross sections for the ¹H(e,e'π ⁺)n reaction were measured over the –t range of 0.272 to 2.127 GeV ²with limited azimuthal coverage at fixed beam energy of 4.709 GeV, Q ² of 2.4 GeV ² and W of 2.0 GeV at the Thomas Jefferson National Accelerator Facility (JLab) Hall C. Results: The –t dependence of the measured π ⁺ electroproduction cross section generally agrees with prior data from JLab Halls B and C. The data are consistent with a Regge amplitude based theoretical model, but show poor agreement with a Generalized Parton Distribution (GPD) based model. Conclusion: The agreement of cross sections with prior data suggests small contribution from the interference terms, and the confirmation of the change in t-slopes between the low- and high -–t regions previously observed in photoproduction indicates the changing nature of the electroproduction reaction in our kinematicmore » regime.« less

Authors:

Basnet, S.;

; Li, W. B.; Blok, H. P.; Gaskell, D.; Horn, T.; Aniol, K.; Arrington, J.; Beise, E. J.; Boeglin, W.; Brash, E. J.; Breuer, H.; Chang, C. C.; Christy, M. E.; Ent, R.; Gibson, E.; Holt, R. J.; Jin, S.; Jones, M. K.; Keppel, C. E. more »

Publication Date:: 2019-12-11

Research Org.:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Org.:: USDOE

Contributing Org.:: Jefferson Lab F(pi)-2 Collaboration

OSTI Identifier:: 1582308

Report Number(s):: JLAB-PHY-19-3125; DOE/OR/23177-4890; arXiv:1911.11681
Journal ID: ISSN 2469-9985; PRVCAN

Grant/Contract Number:: SAPIN-2016-00031

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review C

Additional Journal Information:: Journal Volume: 100; Journal Issue: 6; Journal ID: ISSN 2469-9985

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats


                    Basnet, S., Huber, G. M., Li, W. B., Blok, H. P., Gaskell, D., Horn, T., Aniol, K., Arrington, J., Beise, E. J., Boeglin, W., Brash, E. J., Breuer, H., Chang, C. C., Christy, M. E., Ent, R., Gibson, E., Holt, R. J., 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., Sarty, A., Smith, G. R., Tadevosyan, V., Tang, L. G., Tvaskis, V., Volmer, J., Vulcan, W., Warren, G., Wood, S. A., Xu, C., and Zheng, X. Exclusive π+ electroproduction off the proton from low to high -t.  United States: N. p., 2019. 
        Web.  doi:10.1103/PhysRevC.100.065204.

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                    Basnet, S., Huber, G. M., Li, W. B., Blok, H. P., Gaskell, D., Horn, T., Aniol, K., Arrington, J., Beise, E. J., Boeglin, W., Brash, E. J., Breuer, H., Chang, C. C., Christy, M. E., Ent, R., Gibson, E., Holt, R. J., 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., Sarty, A., Smith, G. R., Tadevosyan, V., Tang, L. G., Tvaskis, V., Volmer, J., Vulcan, W., Warren, G., Wood, S. A., Xu, C., & Zheng, X. Exclusive π+ electroproduction off the proton from low to high -t.  United States.  doi:10.1103/PhysRevC.100.065204.

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                    Basnet, S., Huber, G. M., Li, W. B., Blok, H. P., Gaskell, D., Horn, T., Aniol, K., Arrington, J., Beise, E. J., Boeglin, W., Brash, E. J., Breuer, H., Chang, C. C., Christy, M. E., Ent, R., Gibson, E., Holt, R. J., 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., Sarty, A., Smith, G. R., Tadevosyan, V., Tang, L. G., Tvaskis, V., Volmer, J., Vulcan, W., Warren, G., Wood, S. A., Xu, C., and Zheng, X. Wed .  
        "Exclusive π+ electroproduction off the proton from low to high -t".  United States.  doi:10.1103/PhysRevC.100.065204.

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@article{osti_1582308,

  title        = {Exclusive π+ electroproduction off the proton from low to high -t},

  author       = {Basnet, S. and Huber, G. M. and Li, W. B. and Blok, H. P. and Gaskell, D. and Horn, T. and Aniol, K. and Arrington, J. and Beise, E. J. and Boeglin, W. and Brash, E. J. and Breuer, H. and Chang, C. C. and Christy, M. E. and Ent, R. and Gibson, E. and Holt, R. J. 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 Sarty, A. and Smith, G. R. and Tadevosyan, V. and Tang, L. G. and Tvaskis, V. and Volmer, J. and Vulcan, W. and Warren, G. and Wood, S. A. and Xu, C. and Zheng, X.},

  abstractNote = {Background: Measurements of exclusive meson production are a valuable tool in the study of hadronic structure. Specifically, one can discern the relevant degrees of freedom at different distance scales through these studies. Purpose: To study the transition between non-perturbative and perturbative Quantum Chromodyanmics as the square of four momentum transfer to the struck proton, –t, is increased. Method: Cross sections for the 1H(e,e'π+)n reaction were measured over the –t range of 0.272 to 2.127 GeV2with limited azimuthal coverage at fixed beam energy of 4.709 GeV, Q2 of 2.4 GeV2 and W of 2.0 GeV at the Thomas Jefferson National Accelerator Facility (JLab) Hall C. Results: The –t dependence of the measured π+ electroproduction cross section generally agrees with prior data from JLab Halls B and C. The data are consistent with a Regge amplitude based theoretical model, but show poor agreement with a Generalized Parton Distribution (GPD) based model. Conclusion: The agreement of cross sections with prior data suggests small contribution from the interference terms, and the confirmation of the change in t-slopes between the low- and high -–t regions previously observed in photoproduction indicates the changing nature of the electroproduction reaction in our kinematic regime.},

  doi          = {10.1103/PhysRevC.100.065204},

  journal      = {Physical Review C},

  number       = 6,

  volume       = 100,

  place        = {United States},

  year         = {2019},

  month        = {12}

}

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This content will become publicly available on December 11, 2020

Title: Exclusive π + electroproduction off the proton from low to high - t

Abstract

Citation Formats

Space-time structure of hard-scattering processes journal, September 2004

Scaling study of the pion electroproduction cross sections journal, November 2008

Charged pion form factor between Q 2 = 0 . 60 and 2.45 GeV 2 . I. Measurements of the cross section for the 1 H ( e , e ' π + ) n reaction journal, October 2008

Charged pion form factor between Q 2 = 0 . 60 and 2 . 45 GeV 2 . II. Determination of, and results for, the pion form factor journal, October 2008

Modifications of nucleons in nuclei and other consequences of the quark substructure journal, January 1990

Review of Particle Physics journal, August 2014

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

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

Deep exclusive π+ electroproduction off the proton at CLAS journal, January 2013

Radiative corrections for ( e , e ′ p ) reactions at GeV energies journal, October 2001

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

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

Charged-pion electroproduction above the resonance region journal, February 2014

An attempt to understand exclusive π + electroproduction journal, November 2009

Transversity in hard exclusive electroproduction of pseudoscalar mesons journal, September 2011

Measurement of deeply virtual Compton scattering and its t-dependence at HERA journal, January 2008

Title: Exclusive $π^{+}$ electroproduction off the proton from low to high $- t$

Space-time structure of hard-scattering processes
journal, September 2004

Scaling study of the pion electroproduction cross sections
journal, November 2008

Charged pion form factor between $Q^{2} = 0.60$ and 2.45 ${GeV}^{2}$ . I. Measurements of the cross section for the $^{1} H (e, e^{'} π^{+}) n$ reaction
journal, October 2008

Charged pion form factor between $Q^{2} = 0.60$ and $2.45 GeV^{2}$ . II. Determination of, and results for, the pion form factor
journal, October 2008

Modifications of nucleons in nuclei and other consequences of the quark substructure
journal, January 1990

Review of Particle Physics
journal, August 2014

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

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

Deep exclusive π+ electroproduction off the proton at CLAS
journal, January 2013

Radiative corrections for ${(e, e}^{'} p)$ reactions at GeV energies
journal, October 2001

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

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

Charged-pion electroproduction above the resonance region
journal, February 2014

An attempt to understand exclusive π + electroproduction
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journal, September 2011

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journal, January 2008