Cross sections and beam asymmetries for (e)over-right-arrowp -> en pi(+) in the nucleon resonance region for 1.7 Q(2)GeV2

Clas Collaboration; K. Park; V. D. Burkert; W. Kim; I. G. Aznauryan; R. Minehart; L. C. Smith; K. Joo; L. Elouadrhiri; G. Adams; M. J. Amaryan; P. Ambrozewicz; M. Anghinolfi; G. Asryan; H. Avakian; H. Bagdasaryan; N. Baillie; J. P. Ball; N. A. Baltzell; S. Barrow; V. Batourine; M. Battaglieri; I. Bedlinskiy; M. Bektasoglu; M. Bellis; N. Benmouna; B. L. Berman; A. S. Biselli; L. Blaszczyk; B. E. Bonner; C. Bookwalter; S. Bouchigny; S. Boiarinov; R. Bradford; D. Branford; J. Briscoe; W. K. Brooks; S. Bultmann; C. Butuceanu; J. R. Calarco; S. L. Careccia; D. S. Carman; L. Casey; A. Cazes; S. Chen; L. Cheng; P. L. Cole; P. Collins; P. Coltharp; D. Cords; D. P. Watts

doi:10.1103/PhysRevC.77.015208

Cross sections and beam asymmetries for (e)over-right-arrowp -> en pi(+) in the nucleon resonance region for 1.7 Q(2)GeV2

Clas Collaboration, K. Park, V. D. Burkert, W. Kim, I. G. Aznauryan, R. Minehart, L. C. Smith, K. Joo, L. Elouadrhiri, G. Adams, M. J. Amaryan, P. Ambrozewicz, M. Anghinolfi, G. Asryan, H. Avakian, H. Bagdasaryan, N. Baillie, J. P. Ball, N. A. Baltzell, S. BarrowV. Batourine, M. Battaglieri, I. Bedlinskiy, M. Bektasoglu, M. Bellis, N. Benmouna, B. L. Berman, A. S. Biselli, L. Blaszczyk, B. E. Bonner, C. Bookwalter, S. Bouchigny, S. Boiarinov, R. Bradford, D. Branford, J. Briscoe, W. K. Brooks, S. Bultmann, C. Butuceanu, J. R. Calarco, S. L. Careccia, D. S. Carman, L. Casey, A. Cazes, S. Chen, L. Cheng, P. L. Cole, P. Collins, P. Coltharp, D. Cords, D. P. Watts

School of Physics and Astronomy

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Abstract / Description of output

The exclusive electroproduction process (e) over right arrowp -> e(')n pi(+) was measured in the range of the photon virtuality Q(2)=1.7-4.5 GeV2, and the invariant mass range for the n pi(+) system of W=1.15-1.7 GeV using the CEBAF Large Acceptance Spectrometer. For the first time, these kinematics are probed in exclusive pi(+) production from protons with nearly full coverage in the azimuthal and polar angles of the n pi(+) center-of-mass system. The n pi(+) channel has particular sensitivity to the isospin 1/2 excited nucleon states, and together with the p pi(0) final state will serve to determine the transition form factors of a large number of resonances. The largest discrepancy between these results and present modes was seen in the sigma(')(LT) structure function. In this experiment, 31,295 cross section and 4,184 asymmetry data points were measured. Because of the large volume of data, only a reduced set of structure functions and Legendre polynomial moments can be presented that are obtained in model-independent fits to the differential cross sections.

Original language	English
Article number	015208
Pages (from-to)	-
Number of pages	17
Journal	Physical Review C
Volume	77
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevC.77.015208
Publication status	Published - Jan 2008

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Clas Collaboration, Park, K., Burkert, V. D., Kim, W., Aznauryan, I. G., Minehart, R., Smith, L. C., Joo, K., Elouadrhiri, L., Adams, G., Amaryan, M. J., Ambrozewicz, P., Anghinolfi, M., Asryan, G., Avakian, H., Bagdasaryan, H., Baillie, N., Ball, J. P., Baltzell, N. A., ... Watts, D. P. (2008). Cross sections and beam asymmetries for (e)over-right-arrowp -> en pi(+) in the nucleon resonance region for 1.7 Q(2)GeV2. Physical Review C, 77(1), -. Article 015208. https://doi.org/10.1103/PhysRevC.77.015208

@article{be602aa018f149149970fc3451a1622c,

title = "Cross sections and beam asymmetries for (e)over-right-arrowp -> en pi(+) in the nucleon resonance region for 1.7 Q(2)GeV2",

abstract = "The exclusive electroproduction process (e) over right arrowp -> e(')n pi(+) was measured in the range of the photon virtuality Q(2)=1.7-4.5 GeV2, and the invariant mass range for the n pi(+) system of W=1.15-1.7 GeV using the CEBAF Large Acceptance Spectrometer. For the first time, these kinematics are probed in exclusive pi(+) production from protons with nearly full coverage in the azimuthal and polar angles of the n pi(+) center-of-mass system. The n pi(+) channel has particular sensitivity to the isospin 1/2 excited nucleon states, and together with the p pi(0) final state will serve to determine the transition form factors of a large number of resonances. The largest discrepancy between these results and present modes was seen in the sigma(')(LT) structure function. In this experiment, 31,295 cross section and 4,184 asymmetry data points were measured. Because of the large volume of data, only a reduced set of structure functions and Legendre polynomial moments can be presented that are obtained in model-independent fits to the differential cross sections.",

author = "{Clas Collaboration} and K. Park and Burkert, {V. D.} and W. Kim and Aznauryan, {I. G.} and R. Minehart and Smith, {L. C.} and K. Joo and L. Elouadrhiri and G. Adams and Amaryan, {M. J.} and P. Ambrozewicz and M. Anghinolfi and G. Asryan and H. Avakian and H. Bagdasaryan and N. Baillie and Ball, {J. P.} and Baltzell, {N. A.} and S. Barrow and V. Batourine and M. Battaglieri and I. Bedlinskiy and M. Bektasoglu and M. Bellis and N. Benmouna and Berman, {B. L.} and Biselli, {A. S.} and L. Blaszczyk and Bonner, {B. E.} and C. Bookwalter and S. Bouchigny and S. Boiarinov and R. Bradford and D. Branford and J. Briscoe and Brooks, {W. K.} and S. Bultmann and C. Butuceanu and Calarco, {J. R.} and Careccia, {S. L.} and Carman, {D. S.} and L. Casey and A. Cazes and S. Chen and L. Cheng and Cole, {P. L.} and P. Collins and P. Coltharp and D. Cords and Watts, {D. P.}",

year = "2008",

month = jan,

doi = "10.1103/PhysRevC.77.015208",

language = "English",

volume = "77",

pages = "--",

journal = "Physical Review C",

issn = "0556-2813",

publisher = "American Physical Society",

number = "1",

}

Clas Collaboration, Park, K, Burkert, VD, Kim, W, Aznauryan, IG, Minehart, R, Smith, LC, Joo, K, Elouadrhiri, L, Adams, G, Amaryan, MJ, Ambrozewicz, P, Anghinolfi, M, Asryan, G, Avakian, H, Bagdasaryan, H, Baillie, N, Ball, JP, Baltzell, NA, Barrow, S, Batourine, V, Battaglieri, M, Bedlinskiy, I, Bektasoglu, M, Bellis, M, Benmouna, N, Berman, BL, Biselli, AS, Blaszczyk, L, Bonner, BE, Bookwalter, C, Bouchigny, S, Boiarinov, S, Bradford, R, Branford, D, Briscoe, J, Brooks, WK, Bultmann, S, Butuceanu, C, Calarco, JR, Careccia, SL, Carman, DS, Casey, L, Cazes, A, Chen, S, Cheng, L, Cole, PL, Collins, P, Coltharp, P, Cords, D & Watts, DP 2008, 'Cross sections and beam asymmetries for (e)over-right-arrowp -> en pi(+) in the nucleon resonance region for 1.7 Q(2)GeV2', Physical Review C, vol. 77, no. 1, 015208, pp. -. https://doi.org/10.1103/PhysRevC.77.015208

TY - JOUR

T1 - Cross sections and beam asymmetries for (e)over-right-arrowp -> en pi(+) in the nucleon resonance region for 1.7 Q(2)GeV2

AU - Clas Collaboration

AU - Park, K.

AU - Burkert, V. D.

AU - Kim, W.

AU - Aznauryan, I. G.

AU - Minehart, R.

AU - Smith, L. C.

AU - Joo, K.

AU - Elouadrhiri, L.

AU - Adams, G.

AU - Amaryan, M. J.

AU - Ambrozewicz, P.

AU - Anghinolfi, M.

AU - Asryan, G.

AU - Avakian, H.

AU - Bagdasaryan, H.

AU - Baillie, N.

AU - Ball, J. P.

AU - Baltzell, N. A.

AU - Barrow, S.

AU - Batourine, V.

AU - Battaglieri, M.

AU - Bedlinskiy, I.

AU - Bektasoglu, M.

AU - Bellis, M.

AU - Benmouna, N.

AU - Berman, B. L.

AU - Biselli, A. S.

AU - Blaszczyk, L.

AU - Bonner, B. E.

AU - Bookwalter, C.

AU - Bouchigny, S.

AU - Boiarinov, S.

AU - Bradford, R.

AU - Branford, D.

AU - Briscoe, J.

AU - Brooks, W. K.

AU - Bultmann, S.

AU - Butuceanu, C.

AU - Calarco, J. R.

AU - Careccia, S. L.

AU - Carman, D. S.

AU - Casey, L.

AU - Cazes, A.

AU - Chen, S.

AU - Cheng, L.

AU - Cole, P. L.

AU - Collins, P.

AU - Coltharp, P.

AU - Cords, D.

AU - Watts, D. P.

PY - 2008/1

Y1 - 2008/1

N2 - The exclusive electroproduction process (e) over right arrowp -> e(')n pi(+) was measured in the range of the photon virtuality Q(2)=1.7-4.5 GeV2, and the invariant mass range for the n pi(+) system of W=1.15-1.7 GeV using the CEBAF Large Acceptance Spectrometer. For the first time, these kinematics are probed in exclusive pi(+) production from protons with nearly full coverage in the azimuthal and polar angles of the n pi(+) center-of-mass system. The n pi(+) channel has particular sensitivity to the isospin 1/2 excited nucleon states, and together with the p pi(0) final state will serve to determine the transition form factors of a large number of resonances. The largest discrepancy between these results and present modes was seen in the sigma(')(LT) structure function. In this experiment, 31,295 cross section and 4,184 asymmetry data points were measured. Because of the large volume of data, only a reduced set of structure functions and Legendre polynomial moments can be presented that are obtained in model-independent fits to the differential cross sections.

AB - The exclusive electroproduction process (e) over right arrowp -> e(')n pi(+) was measured in the range of the photon virtuality Q(2)=1.7-4.5 GeV2, and the invariant mass range for the n pi(+) system of W=1.15-1.7 GeV using the CEBAF Large Acceptance Spectrometer. For the first time, these kinematics are probed in exclusive pi(+) production from protons with nearly full coverage in the azimuthal and polar angles of the n pi(+) center-of-mass system. The n pi(+) channel has particular sensitivity to the isospin 1/2 excited nucleon states, and together with the p pi(0) final state will serve to determine the transition form factors of a large number of resonances. The largest discrepancy between these results and present modes was seen in the sigma(')(LT) structure function. In this experiment, 31,295 cross section and 4,184 asymmetry data points were measured. Because of the large volume of data, only a reduced set of structure functions and Legendre polynomial moments can be presented that are obtained in model-independent fits to the differential cross sections.

U2 - 10.1103/PhysRevC.77.015208

DO - 10.1103/PhysRevC.77.015208

M3 - Article

SN - 0556-2813

VL - 77

SP - -

JO - Physical Review C

JF - Physical Review C

IS - 1

M1 - 015208

ER -

Cross sections and beam asymmetries for (e)over-right-arrowp -> en pi(+) in the nucleon resonance region for 1.7 Q(2)GeV2

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