Single and double spin asymmetries for deeply virtual Compton scattering measured with CLAS and a longitudinally polarized proton target

CLAS Collaboration; S. Pisano; A. Biselli; S. Niccolai; E. Seder; M. Guidal; M. Mirazita; K. P. Adhikari; D. Adikaram; M. J. Amaryan; M. D. Anderson; S. Anefalos Pereira; H. Avakian; J. Ball; M. Battaglieri; V. Batourine; I. Bedlinskiy; P. Bosted; B. Briscoe; J. Brock; W. K. Brooks; V. D. Burkert; C. Carlin; D. S. Carman; A. Celentano; S. Chandavar; G. Charles; L. Colaneri; P. L. Cole; N. Compton; M. Contalbrigo; O. Cortes; D. G. Crabb; V. Crede; A. D'Angelo; R. De Vita; E. De Sanctis; A. Deur; C. Djalali; R. Dupre; H. Egiyan; A. El Alaoui; L. El Fassi; L. Elouadrhiri; P. Eugenio; G. Fedotov; S. Fegan; Gary Smith; D. P. Watts; Nicholas Zachariou; L. Zana

doi:10.1103/PhysRevD.91.052014

Single and double spin asymmetries for deeply virtual Compton scattering measured with CLAS and a longitudinally polarized proton target

CLAS Collaboration, S. Pisano^*, A. Biselli, S. Niccolai, E. Seder, M. Guidal, M. Mirazita, K. P. Adhikari, D. Adikaram, M. J. Amaryan, M. D. Anderson, S. Anefalos Pereira, H. Avakian, J. Ball, M. Battaglieri, V. Batourine, I. Bedlinskiy, P. Bosted, B. Briscoe, J. BrockW. K. Brooks, V. D. Burkert, C. Carlin, D. S. Carman, A. Celentano, S. Chandavar, G. Charles, L. Colaneri, P. L. Cole, N. Compton, M. Contalbrigo, O. Cortes, D. G. Crabb, V. Crede, A. D'Angelo, R. De Vita, E. De Sanctis, A. Deur, C. Djalali, R. Dupre, H. Egiyan, A. El Alaoui, L. El Fassi, L. Elouadrhiri, P. Eugenio, G. Fedotov, S. Fegan, Gary Smith, D. P. Watts, Nicholas Zachariou, L. Zana

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract / Description of output

Single-beam, single-target, and double spin asymmetries for hard exclusive electroproduction of a photon on the proton (e) over right arrow(p) over right arrow. e'p'gamma are presented. The data were taken at Jefferson Lab using the CEBAF large acceptance spectrometer and a longitudinally polarized (NH3)-N-14 target. The three asymmetries were measured in 165 four-dimensional kinematic bins, covering the widest kinematic range ever explored simultaneously for beam and target-polarization observables in the valence quark region. The kinematic dependences of the obtained asymmetries are discussed and compared to the predictions of models of generalized parton distributions. The measurement of three DVCS spin observables at the same kinematic points allows a quasi-model-independent extraction of the imaginary parts of the H and (H) over tilde Compton form factors, which give insight into the electric and axial charge distributions of valence quarks in the proton.

Original language	English
Article number	052014
Number of pages	27
Journal	Physical Review D
Volume	91
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevD.91.052014
Publication status	Published - 19 Mar 2015

Keywords / Materials (for Non-textual outputs)

GENERALIZED PARTON DISTRIBUTIONS
ELECTROPRODUCTION
NUCLEON
MESONS
QCD

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10.1103/PhysRevD.91.052014

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CLAS Collaboration, Pisano, S., Biselli, A., Niccolai, S., Seder, E., Guidal, M., Mirazita, M., Adhikari, K. P., Adikaram, D., Amaryan, M. J., Anderson, M. D., Pereira, S. A., Avakian, H., Ball, J., Battaglieri, M., Batourine, V., Bedlinskiy, I., Bosted, P., Briscoe, B., ... Zana, L. (2015). Single and double spin asymmetries for deeply virtual Compton scattering measured with CLAS and a longitudinally polarized proton target. Physical Review D, 91(5), Article 052014. https://doi.org/10.1103/PhysRevD.91.052014

@article{11d5cc143778437c81dad6b9834b7b97,

title = "Single and double spin asymmetries for deeply virtual Compton scattering measured with CLAS and a longitudinally polarized proton target",

abstract = "Single-beam, single-target, and double spin asymmetries for hard exclusive electroproduction of a photon on the proton (e) over right arrow(p) over right arrow. e'p'gamma are presented. The data were taken at Jefferson Lab using the CEBAF large acceptance spectrometer and a longitudinally polarized (NH3)-N-14 target. The three asymmetries were measured in 165 four-dimensional kinematic bins, covering the widest kinematic range ever explored simultaneously for beam and target-polarization observables in the valence quark region. The kinematic dependences of the obtained asymmetries are discussed and compared to the predictions of models of generalized parton distributions. The measurement of three DVCS spin observables at the same kinematic points allows a quasi-model-independent extraction of the imaginary parts of the H and (H) over tilde Compton form factors, which give insight into the electric and axial charge distributions of valence quarks in the proton.",

keywords = "GENERALIZED PARTON DISTRIBUTIONS, ELECTROPRODUCTION, NUCLEON, MESONS, QCD",

author = "{CLAS Collaboration} and S. Pisano and A. Biselli and S. Niccolai and E. Seder and M. Guidal and M. Mirazita and Adhikari, {K. P.} and D. Adikaram and Amaryan, {M. J.} and Anderson, {M. D.} and Pereira, {S. Anefalos} and H. Avakian and J. Ball and M. Battaglieri and V. Batourine and I. Bedlinskiy and P. Bosted and B. Briscoe and J. Brock and Brooks, {W. K.} and Burkert, {V. D.} and C. Carlin and Carman, {D. S.} and A. Celentano and S. Chandavar and G. Charles and L. Colaneri and Cole, {P. L.} and N. Compton and M. Contalbrigo and O. Cortes and Crabb, {D. G.} and V. Crede and A. D'Angelo and {De Vita}, R. and {De Sanctis}, E. and A. Deur and C. Djalali and R. Dupre and H. Egiyan and {El Alaoui}, A. and {El Fassi}, L. and L. Elouadrhiri and P. Eugenio and G. Fedotov and S. Fegan and Gary Smith and Watts, {D. P.} and Nicholas Zachariou and L. Zana",

year = "2015",

month = mar,

day = "19",

doi = "10.1103/PhysRevD.91.052014",

language = "English",

volume = "91",

journal = "Physical Review D",

issn = "1550-7998",

publisher = "American Physical Society",

number = "5",

}

CLAS Collaboration, Pisano, S, Biselli, A, Niccolai, S, Seder, E, Guidal, M, Mirazita, M, Adhikari, KP, Adikaram, D, Amaryan, MJ, Anderson, MD, Pereira, SA, Avakian, H, Ball, J, Battaglieri, M, Batourine, V, Bedlinskiy, I, Bosted, P, Briscoe, B, Brock, J, Brooks, WK, Burkert, VD, Carlin, C, Carman, DS, Celentano, A, Chandavar, S, Charles, G, Colaneri, L, Cole, PL, Compton, N, Contalbrigo, M, Cortes, O, Crabb, DG, Crede, V, D'Angelo, A, De Vita, R, De Sanctis, E, Deur, A, Djalali, C, Dupre, R, Egiyan, H, El Alaoui, A, El Fassi, L, Elouadrhiri, L, Eugenio, P, Fedotov, G, Fegan, S, Smith, G, Watts, DP, Zachariou, N & Zana, L 2015, 'Single and double spin asymmetries for deeply virtual Compton scattering measured with CLAS and a longitudinally polarized proton target', Physical Review D, vol. 91, no. 5, 052014. https://doi.org/10.1103/PhysRevD.91.052014

TY - JOUR

T1 - Single and double spin asymmetries for deeply virtual Compton scattering measured with CLAS and a longitudinally polarized proton target

AU - CLAS Collaboration

AU - Pisano, S.

AU - Biselli, A.

AU - Niccolai, S.

AU - Seder, E.

AU - Guidal, M.

AU - Mirazita, M.

AU - Adhikari, K. P.

AU - Adikaram, D.

AU - Amaryan, M. J.

AU - Anderson, M. D.

AU - Pereira, S. Anefalos

AU - Avakian, H.

AU - Ball, J.

AU - Battaglieri, M.

AU - Batourine, V.

AU - Bedlinskiy, I.

AU - Bosted, P.

AU - Briscoe, B.

AU - Brock, J.

AU - Brooks, W. K.

AU - Burkert, V. D.

AU - Carlin, C.

AU - Carman, D. S.

AU - Celentano, A.

AU - Chandavar, S.

AU - Charles, G.

AU - Colaneri, L.

AU - Cole, P. L.

AU - Compton, N.

AU - Contalbrigo, M.

AU - Cortes, O.

AU - Crabb, D. G.

AU - Crede, V.

AU - D'Angelo, A.

AU - De Vita, R.

AU - De Sanctis, E.

AU - Deur, A.

AU - Djalali, C.

AU - Dupre, R.

AU - Egiyan, H.

AU - El Alaoui, A.

AU - El Fassi, L.

AU - Elouadrhiri, L.

AU - Eugenio, P.

AU - Fedotov, G.

AU - Fegan, S.

AU - Smith, Gary

AU - Watts, D. P.

AU - Zachariou, Nicholas

AU - Zana, L.

PY - 2015/3/19

Y1 - 2015/3/19

N2 - Single-beam, single-target, and double spin asymmetries for hard exclusive electroproduction of a photon on the proton (e) over right arrow(p) over right arrow. e'p'gamma are presented. The data were taken at Jefferson Lab using the CEBAF large acceptance spectrometer and a longitudinally polarized (NH3)-N-14 target. The three asymmetries were measured in 165 four-dimensional kinematic bins, covering the widest kinematic range ever explored simultaneously for beam and target-polarization observables in the valence quark region. The kinematic dependences of the obtained asymmetries are discussed and compared to the predictions of models of generalized parton distributions. The measurement of three DVCS spin observables at the same kinematic points allows a quasi-model-independent extraction of the imaginary parts of the H and (H) over tilde Compton form factors, which give insight into the electric and axial charge distributions of valence quarks in the proton.

AB - Single-beam, single-target, and double spin asymmetries for hard exclusive electroproduction of a photon on the proton (e) over right arrow(p) over right arrow. e'p'gamma are presented. The data were taken at Jefferson Lab using the CEBAF large acceptance spectrometer and a longitudinally polarized (NH3)-N-14 target. The three asymmetries were measured in 165 four-dimensional kinematic bins, covering the widest kinematic range ever explored simultaneously for beam and target-polarization observables in the valence quark region. The kinematic dependences of the obtained asymmetries are discussed and compared to the predictions of models of generalized parton distributions. The measurement of three DVCS spin observables at the same kinematic points allows a quasi-model-independent extraction of the imaginary parts of the H and (H) over tilde Compton form factors, which give insight into the electric and axial charge distributions of valence quarks in the proton.

KW - GENERALIZED PARTON DISTRIBUTIONS

KW - ELECTROPRODUCTION

KW - NUCLEON

KW - MESONS

KW - QCD

U2 - 10.1103/PhysRevD.91.052014

DO - 10.1103/PhysRevD.91.052014

M3 - Article

SN - 1550-7998

VL - 91

JO - Physical Review D

JF - Physical Review D

IS - 5

M1 - 052014

ER -

Single and double spin asymmetries for deeply virtual Compton scattering measured with CLAS and a longitudinally polarized proton target

Abstract / Description of output

Keywords / Materials (for Non-textual outputs)

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