Measurement of the generalized form factors near threshold via gamma* p -> n pi(+) at high Q(2)

CLAS Collaboration; K. Park; R. W. Gothe; K. P. Adhikari; D. Adikaram; M. Anghinolfi; H. Baghdasaryan; J. Ball; M. Battaglieri; V. Batourine; I. Bedlinskiy; R. P. Bennett; A. S. Biselli; C. Bookwalter; S. Boiarinov; D. Branford; W. J. Briscoe; W. K. Brooks; V. D. Burkert; D. S. Carman; A. Celentano; S. Chandavar; G. Charles; P. L. Cole; M. Contalbrigo; V. Crede; A. D'Angelo; A. Daniel; N. Dashyan; R. De Vita; E. De Sanctis; A. Deur; C. Djalali; D. Doughty; R. Dupre; A. El Alaoui; L. El Fassi; P. Eugenio; G. Fedotov; A. Fradi; M. Y. Gabrielyan; N. Gevorgyan; G. P. Gilfoyle; K. L. Giovanetti; F. X. Girod; J. T. Goetz; W. Gohn; E. Golovatch; L. Graham; K. A. Griffioen; D. P. Watts

doi:10.1103/PhysRevC.85.035208

Measurement of the generalized form factors near threshold via gamma* p -> n pi(+) at high Q(2)

CLAS Collaboration, K. Park, R. W. Gothe, K. P. Adhikari, D. Adikaram, M. Anghinolfi, H. Baghdasaryan, J. Ball, M. Battaglieri, V. Batourine, I. Bedlinskiy, R. P. Bennett, A. S. Biselli, C. Bookwalter, S. Boiarinov, D. Branford, W. J. Briscoe, W. K. Brooks, V. D. Burkert, D. S. CarmanA. Celentano, S. Chandavar, G. Charles, P. L. Cole, M. Contalbrigo, V. Crede, A. D'Angelo, A. Daniel, N. Dashyan, R. De Vita, E. De Sanctis, A. Deur, C. Djalali, D. Doughty, R. Dupre, A. El Alaoui, L. El Fassi, P. Eugenio, G. Fedotov, A. Fradi, M. Y. Gabrielyan, N. Gevorgyan, G. P. Gilfoyle, K. L. Giovanetti, F. X. Girod, J. T. Goetz, W. Gohn, E. Golovatch, L. Graham, K. A. Griffioen, D. P. Watts

School of Physics and Astronomy

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Abstract / Description of output

We report the first extraction of the pion-nucleon multipoles near the production threshold for the n pi(+) channel at relatively high momentum transfer (Q(2) up to 4.2 GeV2). The dominance of the s-wave transverse multipole (E0+), expected in this region, allowed us to access the generalized form factor G(1) within the light-cone sum-rule (LCSR) framework as well as the axial form factor G(A). The data analyzed in this work were collected by the nearly 4 pi CEBAF Large Acceptance Spectrometer (CLAS) using a 5.754-GeV electron beam on a proton target. The differential cross section and the pi-N multipole E0+/G(D) were measured using two different methods, the LCSR and a direct multipole fit. The results from the two methods are found to be consistent and almost Q(2) independent.

Original language	English
Article number	035208
Pages (from-to)	-
Number of pages	15
Journal	Physical Review C
Volume	85
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevC.85.035208
Publication status	Published - 26 Mar 2012

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10.1103/PhysRevC.85.035208

Illuminating strongly interacting matter
Watts, D.
STFC
1/06/09 → 31/12/13
Project: Research

Cite this

CLAS Collaboration, Park, K., Gothe, R. W., Adhikari, K. P., Adikaram, D., Anghinolfi, M., Baghdasaryan, H., Ball, J., Battaglieri, M., Batourine, V., Bedlinskiy, I., Bennett, R. P., Biselli, A. S., Bookwalter, C., Boiarinov, S., Branford, D., Briscoe, W. J., Brooks, W. K., Burkert, V. D., ... Watts, D. P. (2012). Measurement of the generalized form factors near threshold via gamma* p -> n pi(+) at high Q(2). Physical Review C, 85(3), -. Article 035208. https://doi.org/10.1103/PhysRevC.85.035208

@article{31ced76f41e049678cee6cedea634819,

title = "Measurement of the generalized form factors near threshold via gamma* p -> n pi(+) at high Q(2)",

abstract = "We report the first extraction of the pion-nucleon multipoles near the production threshold for the n pi(+) channel at relatively high momentum transfer (Q(2) up to 4.2 GeV2). The dominance of the s-wave transverse multipole (E0+), expected in this region, allowed us to access the generalized form factor G(1) within the light-cone sum-rule (LCSR) framework as well as the axial form factor G(A). The data analyzed in this work were collected by the nearly 4 pi CEBAF Large Acceptance Spectrometer (CLAS) using a 5.754-GeV electron beam on a proton target. The differential cross section and the pi-N multipole E0+/G(D) were measured using two different methods, the LCSR and a direct multipole fit. The results from the two methods are found to be consistent and almost Q(2) independent.",

author = "{CLAS Collaboration} and K. Park and Gothe, {R. W.} and Adhikari, {K. P.} and D. Adikaram and M. Anghinolfi and H. Baghdasaryan and J. Ball and M. Battaglieri and V. Batourine and I. Bedlinskiy and Bennett, {R. P.} and Biselli, {A. S.} and C. Bookwalter and S. Boiarinov and D. Branford and Briscoe, {W. J.} and Brooks, {W. K.} and Burkert, {V. D.} and Carman, {D. S.} and A. Celentano and S. Chandavar and G. Charles and Cole, {P. L.} and M. Contalbrigo and V. Crede and A. D'Angelo and A. Daniel and N. Dashyan and {De Vita}, R. and {De Sanctis}, E. and A. Deur and C. Djalali and D. Doughty and R. Dupre and {El Alaoui}, A. and {El Fassi}, L. and P. Eugenio and G. Fedotov and A. Fradi and Gabrielyan, {M. Y.} and N. Gevorgyan and Gilfoyle, {G. P.} and Giovanetti, {K. L.} and Girod, {F. X.} and Goetz, {J. T.} and W. Gohn and E. Golovatch and L. Graham and Griffioen, {K. A.} and Watts, {D. P.}",

year = "2012",

month = mar,

day = "26",

doi = "10.1103/PhysRevC.85.035208",

language = "English",

volume = "85",

pages = "--",

journal = "Physical Review C",

issn = "0556-2813",

publisher = "American Physical Society",

number = "3",

}

CLAS Collaboration, Park, K, Gothe, RW, Adhikari, KP, Adikaram, D, Anghinolfi, M, Baghdasaryan, H, Ball, J, Battaglieri, M, Batourine, V, Bedlinskiy, I, Bennett, RP, Biselli, AS, Bookwalter, C, Boiarinov, S, Branford, D, Briscoe, WJ, Brooks, WK, Burkert, VD, Carman, DS, Celentano, A, Chandavar, S, Charles, G, Cole, PL, Contalbrigo, M, Crede, V, D'Angelo, A, Daniel, A, Dashyan, N, De Vita, R, De Sanctis, E, Deur, A, Djalali, C, Doughty, D, Dupre, R, El Alaoui, A, El Fassi, L, Eugenio, P, Fedotov, G, Fradi, A, Gabrielyan, MY, Gevorgyan, N, Gilfoyle, GP, Giovanetti, KL, Girod, FX, Goetz, JT, Gohn, W, Golovatch, E, Graham, L, Griffioen, KA & Watts, DP 2012, 'Measurement of the generalized form factors near threshold via gamma* p -> n pi(+) at high Q(2)', Physical Review C, vol. 85, no. 3, 035208, pp. -. https://doi.org/10.1103/PhysRevC.85.035208

TY - JOUR

T1 - Measurement of the generalized form factors near threshold via gamma* p -> n pi(+) at high Q(2)

AU - CLAS Collaboration

AU - Park, K.

AU - Gothe, R. W.

AU - Adhikari, K. P.

AU - Adikaram, D.

AU - Anghinolfi, M.

AU - Baghdasaryan, H.

AU - Ball, J.

AU - Battaglieri, M.

AU - Batourine, V.

AU - Bedlinskiy, I.

AU - Bennett, R. P.

AU - Biselli, A. S.

AU - Bookwalter, C.

AU - Boiarinov, S.

AU - Branford, D.

AU - Briscoe, W. J.

AU - Brooks, W. K.

AU - Burkert, V. D.

AU - Carman, D. S.

AU - Celentano, A.

AU - Chandavar, S.

AU - Charles, G.

AU - Cole, P. L.

AU - Contalbrigo, M.

AU - Crede, V.

AU - D'Angelo, A.

AU - Daniel, A.

AU - Dashyan, N.

AU - De Vita, R.

AU - De Sanctis, E.

AU - Deur, A.

AU - Djalali, C.

AU - Doughty, D.

AU - Dupre, R.

AU - El Alaoui, A.

AU - El Fassi, L.

AU - Eugenio, P.

AU - Fedotov, G.

AU - Fradi, A.

AU - Gabrielyan, M. Y.

AU - Gevorgyan, N.

AU - Gilfoyle, G. P.

AU - Giovanetti, K. L.

AU - Girod, F. X.

AU - Goetz, J. T.

AU - Gohn, W.

AU - Golovatch, E.

AU - Graham, L.

AU - Griffioen, K. A.

AU - Watts, D. P.

PY - 2012/3/26

Y1 - 2012/3/26

N2 - We report the first extraction of the pion-nucleon multipoles near the production threshold for the n pi(+) channel at relatively high momentum transfer (Q(2) up to 4.2 GeV2). The dominance of the s-wave transverse multipole (E0+), expected in this region, allowed us to access the generalized form factor G(1) within the light-cone sum-rule (LCSR) framework as well as the axial form factor G(A). The data analyzed in this work were collected by the nearly 4 pi CEBAF Large Acceptance Spectrometer (CLAS) using a 5.754-GeV electron beam on a proton target. The differential cross section and the pi-N multipole E0+/G(D) were measured using two different methods, the LCSR and a direct multipole fit. The results from the two methods are found to be consistent and almost Q(2) independent.

AB - We report the first extraction of the pion-nucleon multipoles near the production threshold for the n pi(+) channel at relatively high momentum transfer (Q(2) up to 4.2 GeV2). The dominance of the s-wave transverse multipole (E0+), expected in this region, allowed us to access the generalized form factor G(1) within the light-cone sum-rule (LCSR) framework as well as the axial form factor G(A). The data analyzed in this work were collected by the nearly 4 pi CEBAF Large Acceptance Spectrometer (CLAS) using a 5.754-GeV electron beam on a proton target. The differential cross section and the pi-N multipole E0+/G(D) were measured using two different methods, the LCSR and a direct multipole fit. The results from the two methods are found to be consistent and almost Q(2) independent.

U2 - 10.1103/PhysRevC.85.035208

DO - 10.1103/PhysRevC.85.035208

M3 - Article

SN - 0556-2813

VL - 85

SP - -

JO - Physical Review C

JF - Physical Review C

IS - 3

M1 - 035208

ER -

Measurement of the generalized form factors near threshold via gamma* p -> n pi(+) at high Q(2)

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