Unitary constraints on neutral pion electroproduction

Laget, J. -M.

doi:10.1016/j.physletb.2010.11.014

Unitary constraints on neutral pion electroproduction

Journal Article · Wed Nov 10 00:00:00 EST 2010 · Physics Letters. B

DOI:https://doi.org/10.1016/j.physletb.2010.11.014· OSTI ID:1003852

Laget, J. -M. ^[1]

Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)

At large virtuality $Q^2$, the coupling to the vector meson production channels provides us with a natural explanation of the surprisingly large cross section of the neutral pion electroproduction recently measured at Jefferson Laboratory, without destroying the good agreement between the Regge pole model and the data at the real photon point. Lastly, elastic rescattering of the $$\pi^0$$ provides us with a way to explain why the node, that appears at $$t\sim -0.5$$~GeV$^2$ at the real photon point, disappears as soon as $Q^2$ differs from zero.

View Accepted Manuscript (DOE)

Research Organization:: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC05-06OR23177

OSTI ID:: 1003852

Alternate ID(s):: OSTI ID: 21496090

Report Number(s):: DOE/OR/23177--1193; JLAB-THY--10-1161; arXiv:1004.1949

Journal Information:: Physics Letters. B, Journal Name: Physics Letters. B Journal Issue: 1-4 Vol. 695; ISSN PYLBAJ; ISSN 0370-2693

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

References (44)

Regge cuts and neutral pion electroproduction Collins, P. D. B.; Wilkie, T. D. B. Zeitschrift f�r Physik C Particles and Fields, Vol. 7, Issue 4 https://doi.org/10.1007/bf01431568	journal	December 1981
Charged ? photoproduction in the energy range 2.8?4.8 GeV Barber, D. P.; Dainton, J. B.; Lee, L. C. Y. Zeitschrift f�r Physik C Particles and Fields, Vol. 2, Issue 1 https://doi.org/10.1007/bf01546228	journal	March 1979
Pion photoproduction on few body systems Laget, J. Physics Reports, Vol. 69, Issue 1 https://doi.org/10.1016/0370-1573(81)90164-2	journal	March 1981
Electroproduction of neutral pions at energies above the resonance region Brasse, F. W.; Fehrenbach, W.; Flauger, W. Physics Letters B, Vol. 58, Issue 4 https://doi.org/10.1016/0370-2693(75)90703-0	journal	September 1975
Photoproduction of ϱ0, ω and ϱ− mesons on deuterons at energies between 1 and 5 GeV Benz, P.; Braun, O.; Butenschön, H. Nuclear Physics B, Vol. 79, Issue 1 https://doi.org/10.1016/0550-3213(74)90176-x	journal	September 1974
Exclusive channels in deep inelastic Lepton-Nucleon scattering and the nature of gluons Nachtmann, Otto Nuclear Physics B, Vol. 115, Issue 1 https://doi.org/10.1016/0550-3213(76)90278-9	journal	November 1976
Measurement of differential cross sections for the π−p→π0n charge exchange scattering from 1969 MeV/c to 2965 MeV/c Suzuki, Y.; Adachi, T.; Daigo, M. Nuclear Physics B, Vol. 294 https://doi.org/10.1016/0550-3213(87)90616-x	journal	January 1987
Unitarity constraints on charged pion photoproduction at large p⊥ Laget, J. M. Physics Letters B, Vol. 685, Issue 2-3 https://doi.org/10.1016/j.physletb.2010.01.052	journal	March 2010
Pion and kaon photoproduction at high energies: forward and intermediate angles Guidal, M.; Laget, J. -M.; Vanderhaeghen, M. Nuclear Physics A, Vol. 627, Issue 4 https://doi.org/10.1016/s0375-9474(97)00612-x	journal	December 1997
Regge description of charged pseudoscalar meson electroproduction above the resonance region Vanderhaeghen, M.; Guidal, M.; Laget, J. -M. Physical Review C, Vol. 57, Issue 3 https://doi.org/10.1103/physrevc.57.1454	journal	March 1998
The Primakoff effect on a proton target Laget, J. M. Physical Review C, Vol. 72, Issue 2 https://doi.org/10.1103/physrevc.72.022202	journal	August 2005
Rescattering in meson photoproduction from few body systems Laget, J. -M. Physical Review C, Vol. 73, Issue 4 https://doi.org/10.1103/physrevc.73.044003	journal	April 2006
Charged pion form factor between Q 2 = 0 . 60 and 2 . 45 GeV 2 . II. Determination of, and results for, the pion form factor Huber, G. M.; Blok, H. P.; Horn, T. Physical Review C, Vol. 78, Issue 4 https://doi.org/10.1103/physrevc.78.045203	journal	October 2008
Neutral-Boson Photoproduction on Hydrogen at High Energies Anderson, R.; Gustavson, D.; Johnson, J. Physical Review D, Vol. 1, Issue 1 https://doi.org/10.1103/physrevd.1.27	journal	January 1970
High-Energy π 0 Photoproduction from Hydrogen with Unpolarized and Linearly Polarized Photons Anderson, R. L.; Gustavson, D. B.; Johnson, J. R. Physical Review D, Vol. 4, Issue 7 https://doi.org/10.1103/physrevd.4.1937	journal	October 1971
π 0 Photoproduction in a Weak-Regge-Cut Model Goldstein, Gary R.; Owens, Joseph F. Physical Review D, Vol. 7, Issue 3 https://doi.org/10.1103/physrevd.7.865	journal	February 1973
Investigation of the Reaction π − p → ω 0 n at 3.65, 4.50, and 5.50 GeV/ c Holloway, L. E.; Huld, B.; Jordan, M. Physical Review D, Vol. 8, Issue 9 https://doi.org/10.1103/physrevd.8.2814	journal	November 1973
Dual Absorptive Model for Dips in Inelastic Hadron Processes Harari, Haim Physical Review Letters, Vol. 26, Issue 22 https://doi.org/10.1103/physrevlett.26.1400	journal	May 1971
Electroproduction of π 0 — a Crucial Test of Dip Mechanisms Harari, Haim Physical Review Letters, Vol. 27, Issue 15 https://doi.org/10.1103/physrevlett.27.1028	journal	October 1971
Beam spin asymmetry in deep and exclusive pi0 electroproduction Collaboration, Clas; De Masi, R. arXiv https://doi.org/10.48550/arxiv.0711.4736	text	January 2007
Deeply virtual and exclusive electroproduction of omega mesons Collaboration, Clas; Morand, L. arXiv https://doi.org/10.48550/arxiv.hep-ex/0504057	text	January 2005
Measurement of Deeply Virtual Compton Scattering with a Polarized Proton Target Chen, S.; Avakian, H.; Burkert, V. arXiv https://doi.org/10.48550/arxiv.hep-ex/0605012	text	January 2006
Photoproduction of Vector Mesons at Large Transfer Laget, J. M. arXiv https://doi.org/10.48550/arxiv.hep-ph/0003213	text	January 2000
The space-time structure of hard scattering processes Laget, J. M. arXiv https://doi.org/10.48550/arxiv.hep-ph/0406153	text	January 2004
Regge cuts and neutral pion electroproduction Collins, P. D. B.; Wilkie, T. D. B. Zeitschrift f�r Physik C Particles and Fields, Vol. 7, Issue 4 https://doi.org/10.1007/BF01431568	journal	December 1981
Charged ? photoproduction in the energy range 2.8?4.8 GeV Barber, D. P.; Dainton, J. B.; Lee, L. C. Y. Zeitschrift f�r Physik C Particles and Fields, Vol. 2, Issue 1 https://doi.org/10.1007/BF01546228	journal	March 1979
Photoproduction of ϱ0, ω and ϱ− mesons on deuterons at energies between 1 and 5 GeV Benz, P.; Braun, O.; Butenschön, H. Nuclear Physics B, Vol. 79, Issue 1 https://doi.org/10.1016/0550-3213(74)90176-X	journal	September 1974
Measurement of differential cross sections for the π−p→π0n charge exchange scattering from 1969 MeV/c to 2965 MeV/c Suzuki, Y.; Adachi, T.; Daigo, M. Nuclear Physics B, Vol. 294 https://doi.org/10.1016/0550-3213(87)90616-X	journal	January 1987
Photoproduction of vector mesons at large momentum transfer Laget, J. -M. Physics Letters B, Vol. 489, Issue 3-4 https://doi.org/10.1016/S0370-2693(00)00945-X	journal	September 2000
Pion and kaon photoproduction at high energies: forward and intermediate angles Guidal, M.; Laget, J. -M.; Vanderhaeghen, M. Nuclear Physics A, Vol. 627, Issue 4 https://doi.org/10.1016/S0375-9474(97)00612-X	journal	December 1997
Regge description of charged pseudoscalar meson electroproduction above the resonance region Vanderhaeghen, M.; Guidal, M.; Laget, J. -M. Physical Review C, Vol. 57, Issue 3 https://doi.org/10.1103/PhysRevC.57.1454	journal	March 1998
The Primakoff effect on a proton target Laget, J. M. Physical Review C, Vol. 72, Issue 2 https://doi.org/10.1103/PhysRevC.72.022202	journal	August 2005
Rescattering in meson photoproduction from few body systems Laget, J. -M. Physical Review C, Vol. 73, Issue 4 https://doi.org/10.1103/PhysRevC.73.044003	journal	April 2006
Measurement of ep → ep π 0 beam spin asymmetries above the resonance region Masi, R. De; Garçon, M.; Zhao, B. Physical Review C, Vol. 77, Issue 4 https://doi.org/10.1103/PhysRevC.77.042201	journal	April 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 Huber, G. M.; Blok, H. P.; Horn, T. Physical Review C, Vol. 78, Issue 4 https://doi.org/10.1103/PhysRevC.78.045203	journal	October 2008
Neutral-Boson Photoproduction on Hydrogen at High Energies Anderson, R.; Gustavson, D.; Johnson, J. Physical Review D, Vol. 1, Issue 1 https://doi.org/10.1103/PhysRevD.1.27	journal	January 1970
High-Energy π 0 Photoproduction from Hydrogen with Unpolarized and Linearly Polarized Photons Anderson, R. L.; Gustavson, D. B.; Johnson, J. R. Physical Review D, Vol. 4, Issue 7 https://doi.org/10.1103/PhysRevD.4.1937	journal	October 1971
π 0 Photoproduction in a Weak-Regge-Cut Model Goldstein, Gary R.; Owens, Joseph F. Physical Review D, Vol. 7, Issue 3 https://doi.org/10.1103/PhysRevD.7.865	journal	February 1973
Space-time structure of hard-scattering processes Laget, J. M. Physical Review D, Vol. 70, Issue 5 https://doi.org/10.1103/PhysRevD.70.054023	journal	September 2004
Investigation of the Reaction π − p → ω 0 n at 3.65, 4.50, and 5.50 GeV/ c Holloway, L. E.; Huld, B.; Jordan, M. Physical Review D, Vol. 8, Issue 9 https://doi.org/10.1103/PhysRevD.8.2814	journal	November 1973
Dual Absorptive Model for Dips in Inelastic Hadron Processes Harari, Haim Physical Review Letters, Vol. 26, Issue 22 https://doi.org/10.1103/PhysRevLett.26.1400	journal	May 1971
Electroproduction of π 0 — a Crucial Test of Dip Mechanisms Harari, Haim Physical Review Letters, Vol. 27, Issue 15 https://doi.org/10.1103/PhysRevLett.27.1028	journal	October 1971
Measurement of Deeply Virtual Compton Scattering with a Polarized-Proton Target Chen, S.; Avakian, H.; Burkert, V. D. Physical Review Letters, Vol. 97, Issue 7 https://doi.org/10.1103/PhysRevLett.97.072002	journal	August 2006
Deeply virtual and exclusive electroproduction of ω-mesons Morand, L.; Doré, D.; Garçon, M. The European Physical Journal A, Vol. 24, Issue 3 https://doi.org/10.1140/epja/i2005-10032-4	journal	June 2005

Cited By (4)

Beam asymmetry Σ for the photoproduction of η and η ′ mesons at E γ = 8.8 GeV Adhikari, S.; Ali, A.; Amaryan, M. Physical Review C, Vol. 100, Issue 5 https://doi.org/10.1103/physrevc.100.052201	journal	November 2019
Exclusive π 0 electroproduction at W > 2 GeV with CLAS Bedlinskiy, I.; Kubarovsky, V.; Niccolai, S. Physical Review C, Vol. 90, Issue 2 https://doi.org/10.1103/physrevc.90.025205	journal	August 2014
Measurement of the beam asymmetry Σ for π 0 and η photoproduction on the proton at E γ = 9 GeV Al Ghoul, H.; Anassontzis, E. G.; Austregesilo, A. Physical Review C, Vol. 95, Issue 4 https://doi.org/10.1103/physrevc.95.042201	journal	April 2017
Measurement of the beam asymmetry Σ for π0 and η photoproduction on the proton at Eγ=9 GeV Al Ghoul, H.; Anassontzis, E. G.; Austregesilo, A. Figshare https://doi.org/10.1184/r1/4926080	text	January 2017

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