Exclusive ${\pi}^0$ electroproduction at $W>2$ GeV with CLAS - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Physical Review C Year : 2014

Exclusive ${\pi}^0$ electroproduction at $W>2$ GeV with CLAS

I. Bedlinskiy , V. Kubarovsky , S. Niccolai , P. Stoler , K. P. Adhikari , M. D. Anderson , S. Anefalos Pereira , H. Avakian , J. Ball (1) , N. A. Baltzell , M. Battaglieri , V. Batourine , A. S. Biselli , S. Boiarinov , J. Bono , W. J. Briscoe , W. K. Brooks , V. D. Burkert , D. S. Carman , A. Celentano , S. Chandavar , L. Colaneri , P. L. Cole , M. Contalbrigo , O. Cortes , V. Crede , A. d'Angelo , N. Dashyan , R. de Vita , E. de Sanctis , A. Deur , C. Djalali , D. Doughty , R. Dupre (2) , H. Egiyan , A. El Alaoui , L. El Fassi , L. Elouadrhiri , P. Eugenio , G. Fedotov , S. Fegan , J. A. Fleming , T. A. Forest , B. Garillon , M. Garçon (1) , G. Gavalian , N. Gevorgyan , Y. Ghandilyan , G. P. Gilfoyle , K. L. Giovanetti , F. X. Girod , E. Golovatch , R. W. Gothe , K. A. Griffioen , B. Guegan (2) , L. Guo , K. Hafidi , H. Hakobyan , N. Harrison , M. Hattawy (2) , K. Hicks , M. Holtrop , D. G. Ireland , B. S. Ishkhanov , E. L. Isupov , D. Jenkins , H. S. Jo (2) , K. Joo , D. Keller , M. Khandaker , A. Kim , W. Kim , A. Klein , F. J. Klein , S. Koirala , S. E. Kuhn , S. V. Kuleshov , P. Lenisa , W. I. Levine , K. Livingston , H. Y. Lu , I . J . D. Macgregor , N. Markov , M. Mayer , B. Mckinnon , M. Mirazita , V. Mokeev , R. A. Montgomery , C. I. Moody , H. Moutarde (1) , A Movsisyan , C. Muñoz Camacho (2) , P. Nadel-Turonski , I. Niculescu , M. Osipenko , A. I. Ostrovidov , L. L. Pappalardo , K. Park , S. Park , E. Pasyuk , E. Phelps , W. Phelps , J. J. Phillips , S. Pisano (2) , O. Pogorelko , J. W. Price , Y. Prok , D. Protopopescu , S. Procureur (1) , A. J. R. Puckett , B. A. Raue , M. Ripani , B. G. Ritchie , A. Rizzo , P. Rossi , P. Roy , F. Sabatié (1) , C. Salgado , D. Schott , R. A. Schumacher , E. Seder , I. Senderovich , Y. G. Sharabian , A. Simonyan , G. D. Smith , D. I. Sober , D. Sokhan (2) , S. S. Stepanyan , S. Strauch , V. Sytnik , W. Tang , Ye Tian , M. Ungaro , A. V. Vlassov , H. Voskanyan , E. Voutier (3) , N. K. Walford , D. Watts , X. Wei , L. B. Weinstein , M. Yurov , N. Zachariou , L. Zana , J. Zhang , Z. W. Zhao , I. Zonta
I. Bedlinskiy
V. Kubarovsky
  • Function : Author
S. Niccolai
  • Function : Author
P. Stoler
  • Function : Author
K. P. Adhikari
  • Function : Author
M. D. Anderson
  • Function : Author
S. Anefalos Pereira
  • Function : Author
H. Avakian
  • Function : Author
N. A. Baltzell
  • Function : Author
M. Battaglieri
  • Function : Author
V. Batourine
  • Function : Author
A. S. Biselli
  • Function : Author
S. Boiarinov
  • Function : Author
J. Bono
  • Function : Author
W. J. Briscoe
  • Function : Author
W. K. Brooks
  • Function : Author
V. D. Burkert
  • Function : Author
D. S. Carman
  • Function : Author
A. Celentano
S. Chandavar
  • Function : Author
L. Colaneri
  • Function : Author
P. L. Cole
  • Function : Author
M. Contalbrigo
  • Function : Author
O. Cortes
  • Function : Author
V. Crede
  • Function : Author
A. d'Angelo
N. Dashyan
  • Function : Author
R. de Vita
  • Function : Author
E. de Sanctis
  • Function : Author
A. Deur
C. Djalali
  • Function : Author
D. Doughty
  • Function : Author
R. Dupre
H. Egiyan
A. El Alaoui
  • Function : Author
L. El Fassi
  • Function : Author
L. Elouadrhiri
  • Function : Author
P. Eugenio
  • Function : Author
G. Fedotov
  • Function : Author
S. Fegan
J. A. Fleming
  • Function : Author
T. A. Forest
  • Function : Author
B. Garillon
  • Function : Author
G. Gavalian
  • Function : Author
N. Gevorgyan
  • Function : Author
Y. Ghandilyan
  • Function : Author
G. P. Gilfoyle
  • Function : Author
K. L. Giovanetti
  • Function : Author
F. X. Girod
  • Function : Author
E. Golovatch
  • Function : Author
R. W. Gothe
  • Function : Author
K. A. Griffioen
  • Function : Author
L. Guo
  • Function : Author
K. Hafidi
  • Function : Author
H. Hakobyan
  • Function : Author
N. Harrison
  • Function : Author
K. Hicks
  • Function : Author
M. Holtrop
D. G. Ireland
  • Function : Author
B. S. Ishkhanov
  • Function : Author
E. L. Isupov
  • Function : Author
D. Jenkins
  • Function : Author
K. Joo
  • Function : Author
D. Keller
M. Khandaker
A. Kim
  • Function : Author
W. Kim
  • Function : Author
A. Klein
  • Function : Author
F. J. Klein
  • Function : Author
S. Koirala
  • Function : Author
S. E. Kuhn
  • Function : Author
S. V. Kuleshov
  • Function : Author
P. Lenisa
W. I. Levine
  • Function : Author
K. Livingston
  • Function : Author
H. Y. Lu
  • Function : Author
I . J . D. Macgregor
  • Function : Author
N. Markov
  • Function : Author
M. Mayer
  • Function : Author
B. Mckinnon
  • Function : Author
M. Mirazita
  • Function : Author
V. Mokeev
R. A. Montgomery
  • Function : Author
C. I. Moody
  • Function : Author
A Movsisyan
  • Function : Author
P. Nadel-Turonski
  • Function : Author
I. Niculescu
  • Function : Author
M. Osipenko
A. I. Ostrovidov
  • Function : Author
L. L. Pappalardo
  • Function : Author
K. Park
  • Function : Author
S. Park
  • Function : Author
E. Pasyuk
E. Phelps
  • Function : Author
W. Phelps
  • Function : Author
J. J. Phillips
  • Function : Author
O. Pogorelko
  • Function : Author
J. W. Price
  • Function : Author
Y. Prok
  • Function : Author
D. Protopopescu
A. J. R. Puckett
  • Function : Author
B. A. Raue
  • Function : Author
M. Ripani
B. G. Ritchie
  • Function : Author
A. Rizzo
  • Function : Author
P. Rossi
  • Function : Author
P. Roy
  • Function : Author
C. Salgado
  • Function : Author
D. Schott
  • Function : Author
R. A. Schumacher
  • Function : Author
E. Seder
  • Function : Author
I. Senderovich
  • Function : Author
Y. G. Sharabian
  • Function : Author
A. Simonyan
  • Function : Author
G. D. Smith
  • Function : Author
D. I. Sober
  • Function : Author
S. S. Stepanyan
  • Function : Author
S. Strauch
  • Function : Author
V. Sytnik
  • Function : Author
W. Tang
  • Function : Author
Ye Tian
M. Ungaro
  • Function : Author
A. V. Vlassov
  • Function : Author
H. Voskanyan
  • Function : Author
N. K. Walford
  • Function : Author
D. Watts
X. Wei
  • Function : Author
L. B. Weinstein
  • Function : Author
M. Yurov
  • Function : Author
N. Zachariou
L. Zana
J. Zhang
  • Function : Author
Z. W. Zhao
  • Function : Author
I. Zonta
  • Function : Author

Abstract

Exclusive neutral-pion electroproduction ($ep\to e^\prime p^\prime \pi^0$) was measured at Jefferson Lab with a 5.75-GeV electron beam and the CLAS detector. Differential cross sections $d^4\sigma/dtdQ^2dx_Bd\phi_\pi$ and structure functions $\sigma_T+\epsilon\sigma_L, \sigma_{TT}$ and $\sigma_{LT}$ as functions of $t$ were obtained over a wide range of $Q^2$ and $x_B$. The data are compared with Regge and handbag theoretical calculations. Analyses in both frameworks find that a large dominance of transverse processes is necessary to explain the experimental results. For the Regge analysis it is found that the inclusion of vector meson rescattering processes is necessary to bring the magnitude of the calculated and measured structure functions into rough agreement. In the handbag framework, there are two independent calculations, both of which appear to roughly explain the magnitude of the structure functions in terms of transversity generalized parton distributions.

Dates and versions

in2p3-00987386 , version 1 (06-05-2014)

Identifiers

Cite

I. Bedlinskiy, V. Kubarovsky, S. Niccolai, P. Stoler, K. P. Adhikari, et al.. Exclusive ${\pi}^0$ electroproduction at $W>2$ GeV with CLAS. Physical Review C, 2014, 90, pp.025205. ⟨10.1103/PhysRevC.90.025205⟩. ⟨in2p3-00987386⟩
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