Beam spin asymmetries in deeply virtual Compton scattering (DVCS) with CLAS at 4.8 GeV

CLAS Collaboration; G. Gavalian; V. D. Burkert; L. Elouadrhiri; M. Holtrop; S. Stepanyan; D. Abrahamyan; G. Adams; M. J. Amaryan; P. Ambrozewicz; M. Anghinolfi; B. Asavapibhop; G. Asryan; H. Avakian; H. Bagdasaryan; N. Baillie; J. P. Ball; N. A. Baltzell; S. Barrow; V. Batourine; M. Battaglieri; K. Beard; I. Bedlinskiy; M. Bektasoglu; M. Bellis; N. Benmouna; B. L. Berman; A. S. Biselli; B. E. Bonner; S. Bouchigny; S. Boiarinov; R. Bradford; D. Branford; W. J. Briscoe; W. K. Brooks; S. Bueltmann; C. Butuceanu; J. R. Calarco; S. L. Careccia; D. S. Carman; B. Carnahan; S. Chen; P. L. Cole; A. Coleman; P. Collins; P. Coltharp; D. Cords; P. Corvisiero; H. Y. Lu; R. Thompson; D. P. Watts

doi:10.1103/PhysRevC.80.035206

Beam spin asymmetries in deeply virtual Compton scattering (DVCS) with CLAS at 4.8 GeV

CLAS Collaboration, G. Gavalian, V. D. Burkert, L. Elouadrhiri, M. Holtrop, S. Stepanyan, D. Abrahamyan, G. Adams, M. J. Amaryan, P. Ambrozewicz, M. Anghinolfi, B. Asavapibhop, G. Asryan, H. Avakian, H. Bagdasaryan, N. Baillie, J. P. Ball, N. A. Baltzell, S. Barrow, V. BatourineM. Battaglieri, K. Beard, I. Bedlinskiy, M. Bektasoglu, M. Bellis, N. Benmouna, B. L. Berman, A. S. Biselli, B. E. Bonner, S. Bouchigny, S. Boiarinov, R. Bradford, D. Branford, W. J. Briscoe, W. K. Brooks, S. Bueltmann, C. Butuceanu, J. R. Calarco, S. L. Careccia, D. S. Carman, B. Carnahan, S. Chen, P. L. Cole, A. Coleman, P. Collins, P. Coltharp, D. Cords, P. Corvisiero, H. Y. Lu, R. Thompson, D. P. Watts

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

Abstract / Description of output

We report measurements of the beam spin asymmetry in deeply virtual Compton scattering (DVCS) at an electron beam energy of 4.8 GeV using the CLAS detector at the Thomas Jefferson National Accelerator Facility. The DVCS beam spin asymmetry has been measured in a wide range of kinematics, 1.0 < Q(2) < 2.8 (GeV/c)(2), 0.12 < x(B) < 0.48, and 0.1 < -t < 0.8 (GeV/c)(2), using the reaction (e) over right arrow -> e'pX. The number of H(e, e'gamma p) and H(e, e'pi(0)p) events are separated in each (Q(2), x(B), t) bin by a fit to the line shape of the H(e, e'p) X M-x(2) distribution. The validity of the method was studied in detail using experimental and simulated data. It was shown that with the achieved missing mass squared resolution and the available statistics, the separation of DVCS-Bethe-Heitler and pi(0) events can reliably be done with less than 5% uncertainty. Also, the Q(2) and t dependences of the sin phi moments of the asymmetry are extracted and compared with theoretical calculations.

Original language	English
Article number	035206
Pages (from-to)	-
Number of pages	14
Journal	Physical Review C
Volume	80
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevC.80.035206
Publication status	Published - Sept 2009

Access to Document

10.1103/PhysRevC.80.035206

publisher final version
Publisher's Version/PDF: author can archive publisher's version/PDF
Final published version, 2.08 MB

http://prc.aps.org/abstract/PRC/v80/i3/e035206

Cite this

CLAS Collaboration, Gavalian, G., Burkert, V. D., Elouadrhiri, L., Holtrop, M., Stepanyan, S., Abrahamyan, D., Adams, G., Amaryan, M. J., Ambrozewicz, P., Anghinolfi, M., Asavapibhop, B., Asryan, G., Avakian, H., Bagdasaryan, H., Baillie, N., Ball, J. P., Baltzell, N. A., Barrow, S., ... Watts, D. P. (2009). Beam spin asymmetries in deeply virtual Compton scattering (DVCS) with CLAS at 4.8 GeV. Physical Review C, 80(3), -. Article 035206. https://doi.org/10.1103/PhysRevC.80.035206

@article{034c6460c4df4a438a4835b9406054b1,

title = "Beam spin asymmetries in deeply virtual Compton scattering (DVCS) with CLAS at 4.8 GeV",

abstract = "We report measurements of the beam spin asymmetry in deeply virtual Compton scattering (DVCS) at an electron beam energy of 4.8 GeV using the CLAS detector at the Thomas Jefferson National Accelerator Facility. The DVCS beam spin asymmetry has been measured in a wide range of kinematics, 1.0 < Q(2) < 2.8 (GeV/c)(2), 0.12 < x(B) < 0.48, and 0.1 < -t < 0.8 (GeV/c)(2), using the reaction (e) over right arrow -> e'pX. The number of H(e, e'gamma p) and H(e, e'pi(0)p) events are separated in each (Q(2), x(B), t) bin by a fit to the line shape of the H(e, e'p) X M-x(2) distribution. The validity of the method was studied in detail using experimental and simulated data. It was shown that with the achieved missing mass squared resolution and the available statistics, the separation of DVCS-Bethe-Heitler and pi(0) events can reliably be done with less than 5% uncertainty. Also, the Q(2) and t dependences of the sin phi moments of the asymmetry are extracted and compared with theoretical calculations.",

author = "{CLAS Collaboration} and G. Gavalian and Burkert, {V. D.} and L. Elouadrhiri and M. Holtrop and S. Stepanyan and D. Abrahamyan and G. Adams and Amaryan, {M. J.} and P. Ambrozewicz and M. Anghinolfi and B. Asavapibhop 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 K. Beard and I. Bedlinskiy and M. Bektasoglu and M. Bellis and N. Benmouna and Berman, {B. L.} and Biselli, {A. S.} and Bonner, {B. E.} and S. Bouchigny and S. Boiarinov and R. Bradford and D. Branford and Briscoe, {W. J.} and Brooks, {W. K.} and S. Bueltmann and C. Butuceanu and Calarco, {J. R.} and Careccia, {S. L.} and Carman, {D. S.} and B. Carnahan and S. Chen and Cole, {P. L.} and A. Coleman and P. Collins and P. Coltharp and D. Cords and P. Corvisiero and Lu, {H. Y.} and R. Thompson and Watts, {D. P.}",

year = "2009",

month = sep,

doi = "10.1103/PhysRevC.80.035206",

language = "English",

volume = "80",

pages = "--",

journal = "Physical Review C",

issn = "0556-2813",

publisher = "American Physical Society",

number = "3",

}

CLAS Collaboration, Gavalian, G, Burkert, VD, Elouadrhiri, L, Holtrop, M, Stepanyan, S, Abrahamyan, D, Adams, G, Amaryan, MJ, Ambrozewicz, P, Anghinolfi, M, Asavapibhop, B, Asryan, G, Avakian, H, Bagdasaryan, H, Baillie, N, Ball, JP, Baltzell, NA, Barrow, S, Batourine, V, Battaglieri, M, Beard, K, Bedlinskiy, I, Bektasoglu, M, Bellis, M, Benmouna, N, Berman, BL, Biselli, AS, Bonner, BE, Bouchigny, S, Boiarinov, S, Bradford, R, Branford, D, Briscoe, WJ, Brooks, WK, Bueltmann, S, Butuceanu, C, Calarco, JR, Careccia, SL, Carman, DS, Carnahan, B, Chen, S, Cole, PL, Coleman, A, Collins, P, Coltharp, P, Cords, D, Corvisiero, P, Lu, HY, Thompson, R & Watts, DP 2009, 'Beam spin asymmetries in deeply virtual Compton scattering (DVCS) with CLAS at 4.8 GeV', Physical Review C, vol. 80, no. 3, 035206, pp. -. https://doi.org/10.1103/PhysRevC.80.035206

TY - JOUR

T1 - Beam spin asymmetries in deeply virtual Compton scattering (DVCS) with CLAS at 4.8 GeV

AU - CLAS Collaboration

AU - Gavalian, G.

AU - Burkert, V. D.

AU - Elouadrhiri, L.

AU - Holtrop, M.

AU - Stepanyan, S.

AU - Abrahamyan, D.

AU - Adams, G.

AU - Amaryan, M. J.

AU - Ambrozewicz, P.

AU - Anghinolfi, M.

AU - Asavapibhop, B.

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 - Beard, K.

AU - Bedlinskiy, I.

AU - Bektasoglu, M.

AU - Bellis, M.

AU - Benmouna, N.

AU - Berman, B. L.

AU - Biselli, A. S.

AU - Bonner, B. E.

AU - Bouchigny, S.

AU - Boiarinov, S.

AU - Bradford, R.

AU - Branford, D.

AU - Briscoe, W. J.

AU - Brooks, W. K.

AU - Bueltmann, S.

AU - Butuceanu, C.

AU - Calarco, J. R.

AU - Careccia, S. L.

AU - Carman, D. S.

AU - Carnahan, B.

AU - Chen, S.

AU - Cole, P. L.

AU - Coleman, A.

AU - Collins, P.

AU - Coltharp, P.

AU - Cords, D.

AU - Corvisiero, P.

AU - Lu, H. Y.

AU - Thompson, R.

AU - Watts, D. P.

PY - 2009/9

Y1 - 2009/9

N2 - We report measurements of the beam spin asymmetry in deeply virtual Compton scattering (DVCS) at an electron beam energy of 4.8 GeV using the CLAS detector at the Thomas Jefferson National Accelerator Facility. The DVCS beam spin asymmetry has been measured in a wide range of kinematics, 1.0 < Q(2) < 2.8 (GeV/c)(2), 0.12 < x(B) < 0.48, and 0.1 < -t < 0.8 (GeV/c)(2), using the reaction (e) over right arrow -> e'pX. The number of H(e, e'gamma p) and H(e, e'pi(0)p) events are separated in each (Q(2), x(B), t) bin by a fit to the line shape of the H(e, e'p) X M-x(2) distribution. The validity of the method was studied in detail using experimental and simulated data. It was shown that with the achieved missing mass squared resolution and the available statistics, the separation of DVCS-Bethe-Heitler and pi(0) events can reliably be done with less than 5% uncertainty. Also, the Q(2) and t dependences of the sin phi moments of the asymmetry are extracted and compared with theoretical calculations.

AB - We report measurements of the beam spin asymmetry in deeply virtual Compton scattering (DVCS) at an electron beam energy of 4.8 GeV using the CLAS detector at the Thomas Jefferson National Accelerator Facility. The DVCS beam spin asymmetry has been measured in a wide range of kinematics, 1.0 < Q(2) < 2.8 (GeV/c)(2), 0.12 < x(B) < 0.48, and 0.1 < -t < 0.8 (GeV/c)(2), using the reaction (e) over right arrow -> e'pX. The number of H(e, e'gamma p) and H(e, e'pi(0)p) events are separated in each (Q(2), x(B), t) bin by a fit to the line shape of the H(e, e'p) X M-x(2) distribution. The validity of the method was studied in detail using experimental and simulated data. It was shown that with the achieved missing mass squared resolution and the available statistics, the separation of DVCS-Bethe-Heitler and pi(0) events can reliably be done with less than 5% uncertainty. Also, the Q(2) and t dependences of the sin phi moments of the asymmetry are extracted and compared with theoretical calculations.

U2 - 10.1103/PhysRevC.80.035206

DO - 10.1103/PhysRevC.80.035206

M3 - Article

SN - 0556-2813

VL - 80

SP - -

JO - Physical Review C

JF - Physical Review C

IS - 3

M1 - 035206

ER -

Beam spin asymmetries in deeply virtual Compton scattering (DVCS) with CLAS at 4.8 GeV

Abstract / Description of output

Access to Document

Fingerprint

Cite this