Measurement of the Q2 Dependence of the Deuteron Spin Structure Function g1 and its Moments at Low Q2 with CLAS

CLAS Collaboration

doi:10.1103/PhysRevLett.120.062501

Measurement of the Q2 Dependence of the Deuteron Spin Structure Function g1 and its Moments at Low Q2 with CLAS

CLAS Collaboration

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

27 Scopus citations

Abstract

We measured the g1 spin structure function of the deuteron at low Q2, where QCD can be approximated with chiral perturbation theory (χPT). The data cover the resonance region, up to an invariant mass of W≈1.9 GeV. The generalized Gerasimov-Drell-Hearn sum, the moment Γ1d and the spin polarizability γ0d are precisely determined down to a minimum Q2 of 0.02 GeV2 for the first time, about 2.5 times lower than that of previous data. We compare them to several χPT calculations and models. These results are the first in a program of benchmark measurements of polarization observables in the χPT domain.

Original language	English
Article number	062501
Journal	Physical Review Letters
Volume	120
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevLett.120.062501
State	Published - Feb 8 2018
Externally published	Yes

Funding

This work was supported by the U.S. Department of Energy (DOE), the U.S. National Science Foundation, the U.S. Jeffress Memorial Trust, the Physics and Astronomy Department and the Office of Research and Economic Development at Mississippi State University, the United Kingdom Science and Technology Facilities Council (STFC), the Italian Istituto Nazionale di Fisica Nucleare, the French Institut National de Physique Nucléaire et de Physique des Particules, the French Centre National de la Recherche Scientifique, and the National Research Foundation of Korea. This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under Contract No. DE-AC05-06OR23177.

Funders	Funder number
Not added	ST/P004458/1, ST/L005719/1
Physics and Astronomy Department
United Kingdom Science and Technology Facilities Council
National Science Foundation	1506172, 1505615
National Science Foundation
U.S. Department of Energy
Office of Science
Nuclear Physics	DE-AC05-06OR23177
Nuclear Physics
Thomas F. and Kate Miller Jeffress Memorial Trust
Office of Research and Economic Development, Mississippi State University
Science and Technology Facilities Council	ST/J000175/1
Science and Technology Facilities Council
National Research Foundation of Korea
Centre National de la Recherche Scientifique
Institut National de Physique Nucléaire et de Physique des Particules
Istituto Nazionale di Fisica Nucleare

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10.1103/PhysRevLett.120.062501

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@article{9ffa2cfd5beb4694b42087f2f98ce8c4,

title = "Measurement of the Q2 Dependence of the Deuteron Spin Structure Function g1 and its Moments at Low Q2 with CLAS",

abstract = "We measured the g1 spin structure function of the deuteron at low Q2, where QCD can be approximated with chiral perturbation theory (χPT). The data cover the resonance region, up to an invariant mass of W≈1.9 GeV. The generalized Gerasimov-Drell-Hearn sum, the moment Γ1d and the spin polarizability γ0d are precisely determined down to a minimum Q2 of 0.02 GeV2 for the first time, about 2.5 times lower than that of previous data. We compare them to several χPT calculations and models. These results are the first in a program of benchmark measurements of polarization observables in the χPT domain.",

author = "{CLAS Collaboration} and Adhikari, {K. P.} and A. Deur and {El Fassi}, L. and H. Kang and Kuhn, {S. E.} and M. Ripani and K. Slifer and X. Zheng and S. Adhikari and Z. Akbar and Amaryan, {M. J.} and H. Avakian and J. Ball and I. Balossino and L. Barion and M. Battaglieri and I. Bedlinskiy and Biselli, {A. S.} and P. Bosted and Briscoe, {W. J.} and J. Brock and S. B{\"u}ltmann and Burkert, {V. D.} and {Thanh Cao}, F. and C. Carlin and Carman, {D. S.} and A. Celentano and G. Charles and Chen, {J. P.} and T. Chetry and S. Choi and G. Ciullo and L. Clark and Cole, {P. L.} and M. Contalbrigo and V. Crede and A. D'Angelo and N. Dashyan and {De Vita}, R. and {De Sanctis}, E. and M. Defurne and C. Djalali and Dodge, {G. E.} and V. Drozdov and R. Dupre and H. Egiyan and {El Alaoui}, A. and L. Elouadrhiri and P. Eugenio and J. Pierce",

note = "Publisher Copyright: {\textcopyright} 2018 American Physical Society.",

year = "2018",

month = feb,

day = "8",

doi = "10.1103/PhysRevLett.120.062501",

language = "English",

volume = "120",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "6",

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TY - JOUR

T1 - Measurement of the Q2 Dependence of the Deuteron Spin Structure Function g1 and its Moments at Low Q2 with CLAS

AU - CLAS Collaboration

AU - Adhikari, K. P.

AU - Deur, A.

AU - El Fassi, L.

AU - Kang, H.

AU - Kuhn, S. E.

AU - Ripani, M.

AU - Slifer, K.

AU - Zheng, X.

AU - Adhikari, S.

AU - Akbar, Z.

AU - Amaryan, M. J.

AU - Avakian, H.

AU - Ball, J.

AU - Balossino, I.

AU - Barion, L.

AU - Battaglieri, M.

AU - Bedlinskiy, I.

AU - Biselli, A. S.

AU - Bosted, P.

AU - Briscoe, W. J.

AU - Brock, J.

AU - Bültmann, S.

AU - Burkert, V. D.

AU - Thanh Cao, F.

AU - Carlin, C.

AU - Carman, D. S.

AU - Celentano, A.

AU - Charles, G.

AU - Chen, J. P.

AU - Chetry, T.

AU - Choi, S.

AU - Ciullo, G.

AU - Clark, L.

AU - Cole, P. L.

AU - Contalbrigo, M.

AU - Crede, V.

AU - D'Angelo, A.

AU - Dashyan, N.

AU - De Vita, R.

AU - De Sanctis, E.

AU - Defurne, M.

AU - Djalali, C.

AU - Dodge, G. E.

AU - Drozdov, V.

AU - Dupre, R.

AU - Egiyan, H.

AU - El Alaoui, A.

AU - Elouadrhiri, L.

AU - Eugenio, P.

AU - Pierce, J.

PY - 2018/2/8

Y1 - 2018/2/8

N2 - We measured the g1 spin structure function of the deuteron at low Q2, where QCD can be approximated with chiral perturbation theory (χPT). The data cover the resonance region, up to an invariant mass of W≈1.9 GeV. The generalized Gerasimov-Drell-Hearn sum, the moment Γ1d and the spin polarizability γ0d are precisely determined down to a minimum Q2 of 0.02 GeV2 for the first time, about 2.5 times lower than that of previous data. We compare them to several χPT calculations and models. These results are the first in a program of benchmark measurements of polarization observables in the χPT domain.

AB - We measured the g1 spin structure function of the deuteron at low Q2, where QCD can be approximated with chiral perturbation theory (χPT). The data cover the resonance region, up to an invariant mass of W≈1.9 GeV. The generalized Gerasimov-Drell-Hearn sum, the moment Γ1d and the spin polarizability γ0d are precisely determined down to a minimum Q2 of 0.02 GeV2 for the first time, about 2.5 times lower than that of previous data. We compare them to several χPT calculations and models. These results are the first in a program of benchmark measurements of polarization observables in the χPT domain.

UR - http://www.scopus.com/inward/record.url?scp=85041807453&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.120.062501

DO - 10.1103/PhysRevLett.120.062501

M3 - Article

C2 - 29481214

AN - SCOPUS:85041807453

SN - 0031-9007

VL - 120

JO - Physical Review Letters

JF - Physical Review Letters

IS - 6

M1 - 062501

ER -

Measurement of the Q2 Dependence of the Deuteron Spin Structure Function g1 and its Moments at Low Q2 with CLAS

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